Boxster Parts Catalog Boxster Accessories Catalog Boxster Technical Articles Boxster Tech Forums
 
  Search our site:    
View Recent Cars  |   Cart  | Project List | Order Status | Help    
 >  >
Engine Sensor Replacement
 
Bookmark and Share

Pelican Technical Article:

Engine Sensor Replacement

Time:

1-3 hrs

Tab:

$3 to $900

Talent:

***

Applicable Models:

Porsche 986 Boxster (1997-04)
Porsche 986 Boxster S (2000-04)
Porsche 987 Boxster (2005-08)
Porsche 987 Boxster S (2005-08)

Parts Required:

Engine sensors

Hot Tip:

Check the codes first prior to replacing sensors

Performance Gain:

Optimal running engine

Complementary Modification:

Replace oxygen sensors
101 Performance Projects for Your Porsche Boxster

This article is one in a series that have been released in conjunction with Wayne's new book, 101 Performance Projects for Your Porsche Boxster. The book contains 312 pages of full color projects detailing everything from performance mods to changing your brake pads. With more than 950+ full-color glossy photos accompanying extensive step-by-step procedures, this book is required reading in any Boxster owner's collection. The book is currently available and in stock now. See The Official Book Website for more details.

I've split this article up into various photos of the sensors and their locations on the engines so that you can easily find them when you need to replace them.
Figure 1

I've split this article up into various photos of the sensors and their locations on the engines so that you can easily find them when you need to replace them. The ambient air temperature sensor measures the air temperature in the engine compartment. This tells the DME computer how hot it is inside the engine compartment, so that the engine compartment fan can be turned on or off. This sensor is simply held in place by a rubber grommet that is attached to the intake manifold on the right side of the engine near the air pump.

The coolant temperature sensor is located on the pulley side of the engine off to the left side of the car near the cylinder head.
Figure 2

The coolant temperature sensor is located on the pulley side of the engine off to the left side of the car near the cylinder head. This sensor measures the temperature of the coolant and is used to adjust mixture levels as the engine begins to heat up to optimum operating temperature.

Shown by the blue arrow is the oil level sensor / oil temperature sensor.
Figure 3

Shown by the blue arrow is the oil level sensor / oil temperature sensor. This is a somewhat unique sensor in that it contains both level and temperature sensing functions within a single unit. Next to it is the knock sensor (purple arrow). There is one installed on both the left and right side of the engine block. Located under the intake manifold, both of these sensors are relatively difficult to get to (you need to remove the intake tubes to access them: see Pelican Technical Article: Starter Replacement).

This photo shows the group of sensors located on the right rear of the engine.
Figure 4

This photo shows the group of sensors located on the right rear of the engine. The purple arrow shows the crank angle sensor or flywheel sensor, which reads the toothed flywheel as it rotates past the sensor (harness plug shown by yellow arrow). The orange arrow shows the camshaft timing advance solenoid (red arrow is the connector). You can access the sensor / solenoid from underneath the car, and the electrical connections from the engine compartment.

Shown here is the camshaft position sensor.
Figure 5

Shown here is the camshaft position sensor. There is one located on the top of the left cylinder head towards the front, and one on the right cylinder head towards the rear for the 5-chain motors used up to about 2001. For 2002 and later 3-chain motors, the sensor is located on the top of the left cylinder head towards the rear, and on the right cylinder head towards the front.

This photo shows the oil pressure sender / switch.
Figure 6

This photo shows the oil pressure sender / switch. Located on the right side cylinder head, the oil pressure sender is installed if your are upgrading your instrument cluster to the 996 Carrera one (see Pelican Technical Article: 996 Gauge Cluster Upgrade). Normally, a simple emergency switch is installed in this location (inset photo, upper right). Use a new sealing ring if you replace this part.

Bookmark and Share
Comments and Suggestions:
herb Comments: I have a real poblem here, I have changed the following on my Boxster 01, fuel pump with the crankshaft position sensor,and the car when it is at idle it behave as though it wants to cut off ,does this have to do with the fuel injectors at this point
September 1, 2016
  Followup from the Pelican Staff: Is the check engine light on or flashing when the problem is present? Sounds like an engine misfire. I would check spark, fuel and compression on all cylinders.
- Nick at Pelican Parts
 
Chiky17 Comments: I want to know the length of the oil level sensor.
March 14, 2016
  Followup from the Pelican Staff: I don’t have that info.

Give our parts specialists a call at 1-888-280-7799. The may be able to measure one from the shelf. - Nick at Pelican Parts
 
cornontherob Comments: Will a faulty crank position sensor throw a code? Engine doesn't seem to be getting ignition, only fuel. Starter cranks, no movement on tach, no codes on durametric.
February 11, 2016
  Followup from the Pelican Staff: If it fails during engine operation, usually. If it is a circuit issue, always. - Nick at Pelican Parts  
Will97 Comments: Changed my MAF, TPS but car still stalls intermittently especially after driving for about 40 minutes and drops below 400 rpm then shuts off what could be the problem? 97 porsche boxster
February 9, 2016
  Followup from the Pelican Staff: I can't help without knowing what is missing from the system when you are trying to start it. When your engine doesn’t start you’ll want to check the basics. Check spark, fuel injector pulse and fuel pressure, volume, quality and engine compression. Are there any fault codes? Once you figure out what is missing, it will be easier to diagnose. - Nick at Pelican Parts  
Freddie Comments: Nick, I take it solenoid is located near battery, right ?
Probably off topic now... Battery show 12.45v but haven't tested cable. It might not be linked but have water under left hand side seat, however no water in tray where alarm/relay is located. Checked all drains and fwd ones had dirt. Not sure this was the cause. Thanks Freddie
January 5, 2016
  Followup from the Pelican Staff: no, the starter solenoid is attached to the starter motor. - Nick at Pelican Parts  
Freddie Comments: Hi Nick, just replaced starter motor but still not cured it. I tried to jump start it but no succes. It still happen after driving the car for a while. Could sensor or relay be faulty, any idea ? Thanks Freddie
December 19, 2015
  Followup from the Pelican Staff: Did you confirm the signal to the solenoid was present? Did you voltage drop test the battery cables? - Nick at Pelican Parts  
freddie Comments: thanks, got it checked and apparently all looks ok. I think I'll replace started motor first and see what happen. Thanks Freddie
December 16, 2015
  Followup from the Pelican Staff: Let us know how it works out. - Nick at Pelican Parts  
Freddie Comments: My 2000 Boxster S developed a starting issue recently. Engine starts from cold every time but will not restart when warm. There is no ignition at all, no cranking nothing. Everything else appear to be working radio, windows, lights, etc. and no warning lights. Not sure this is related to engine heat sensor. Usually the car restart 5 to 8 hours later when cooled down. Very odd. Please help. Thanks Freddie
December 11, 2015
  Followup from the Pelican Staff: Sounds like a faulty starter. I would check the start signal to the starter and voltage drop the battery cables. - Nick at Pelican Parts  
Bobbymac Comments: Thanks Nick. Your point about the basics is good... noted and concur. Also, my code reader was not functioning correctly. So via process of elimination I have narrowed the problem down to the coolant sensor. I do not have a repair manual, and having a difficult time getting an image of the location of the sensor. Can I get to it from the top, or do I need to get to it from below? Do you have an image that can help me locate it? Thanks.
November 23, 2015
  Followup from the Pelican Staff: From below, on the right side. It is mounted in the coolant manifold, near the crankshaft pulley. - Nick at Pelican Parts  
Bobbymac Comments: My question is about the coolant sensor on my 2007 Boxster. The temp gage intermittently 2-3 times in a month was briefly not showing eng temp and a warning light lit indicating that the sensor was not working. I assumed it was a bad connection because it would “fix itself” after a minute or so. Now I am getting the engine warning light with a OBD diagnostic code p3018. I can’t positively nail down that code, but I believe it is referring to the coolant sensor. I feel the sensor has in fact gone bad not a bad connectionand needs replacing. In addition, the car will intermittently not start properly at first, but will ultimately start/run. Can you confirm my assessment and advise corrective action? Thanks. Bob
November 18, 2015
  Followup from the Pelican Staff: I can only offer my advice, I can't exactly confirm anything without seeing the vehicle myself. I do not have a description for that code, so your code reader may be displaying it incorrectly. When your engine doesn’t start you’ll want to check the basics. Check spark, fuel injector pulse and fuel pressure, volume, quality and engine compression. Are there any fault codes? Once you figure out what is missing, it will be easier to diagnose.
- Nick at Pelican Parts
 
parro Comments: recieved ec P1397 on 2002 porsche boxster, replaced the sensor and continue getting same code. help is appreciated.
October 25, 2015
  Followup from the Pelican Staff: Check if the sensor is sending a signal to the DME. May be an issue with the wiring. - Nick at Pelican Parts  
Webby Comments: Hi My 2001 S show misfire on No5 change plug and coil pack run ok for a day now EML come for a period then start to flash and run rough an idea to next step many thanks
June 1, 2015
  Followup from the Pelican Staff: Is the check engine back light on with same fault? I would check spark, fuel and compression on all cylinders.
- Nick at Pelican Parts
 
Jerry Comments: In figure 3, just in front of the oil sensor, there is a boss in the cylinder head casting. In my car 986 Boxster S, 2002, there is a part called a connecting piece 996 104 207 53 loosely press fitted in the boss but with nothing connected to it. What is the purpose of the piece and what if anything should be connected to it?
May 28, 2015
  Followup from the Pelican Staff: It is a plug, I believe to fill a hole a solenoid could go into. - Nick at Pelican Parts  
Dutchman Comments: Is there a way to add an oil-temp meter to my 986 2,5 1997?
In durametric I can see the oil temperature so the signal is available.
How can I use this and what gauge should I use?
May 23, 2015
  Followup from the Pelican Staff: http://forums.pelicanparts.com/boxster-cayman-forum/596737-diy-installing-oil-pressure-oil-temp-instruments.html

I think you'll find what you need here. - Casey at Pelican Parts
 
Joey Comments: So Nick, the answer to my question is that the coolant temperature sensor is accessed from underneath the car vs. from the top of the engine compartment?
If I remove the sensor, how much coolant will I loose since it appears to be at a low point on the engine?
March 19, 2015
  Followup from the Pelican Staff: Accessing from below may be easier on your vehicle.

I would suggest draining the cooling system to prevent spilling. - Nick at Pelican Parts
 
Joey Comments: Hi,
I need help. I'm a DYI guy and I have found that field mice have nested on my engine while I was over-wintering my 2000 boxster in the garage. They chewed trough multiple wires most of which I was able to find and repair with butt connectors and some shrink tubing. I'm down to 1 error code P0117 and my coolant temperature gauge in the car always shows zero. I'm thinking that there are wires to the sensor that may have been chewed thru....but where exactly is the sensor? Pelican parts says on left by pulleys. I don't see anything from the top. Do I need to lift the car, remove panels and access the sensor from underneath? Is there a fuse or a relay? Any help in locating on how to find the coolant temperature sensor will be greatly appreciated. It may coincidentally be a bad sensor but I bet it's bad wires thanks to my furry little friends. Thanks.
March 18, 2015
  Followup from the Pelican Staff: The coolant temp sensor is mounted to the coolant housing, near the crankshaft pulley. - Nick at Pelican Parts  
Ninja650 Comments: Thanks very much for a prompt reply Nick.
I will go back and try to get exact same model, less hassle. Cheers
January 30, 2015
  Followup from the Pelican Staff: Thanks for the follow up. - Nick at Pelican Parts  
Ninja650 Comments: I am replacing my 2002boxter 2.7 engine model 996.104 k 3 for 996.104 k 2 model. The problem is my old engine has 2 camshaft position sensors but replacement engine has only 1 sensor. Can you please advise what to do with spare connector on wire harness if it is needed.
Thank you for any help!
January 30, 2015
  Followup from the Pelican Staff: You need the second camshaft sensor, as that means you have a variocam plus engine. You will need to use the old parts, or use the replacement engine harness and DME> - Nick at Pelican Parts  
cdw Comments: 2004 Porsche Boxster Knock sensor wiring harness. A mouse infiltrated my car and ate the shielding from my knock sensor harness. Here in South Korea where i am stationed i took it to porsche and they wanted a huge amount for one plus lots of cash to install!!! The mouse did not eat through the wire just the shielded rubber part. Is there a replacement you guys have? It is just one side. A few inches of shielding.
September 15, 2014
  Followup from the Pelican Staff: You'll likely need to replace the entire harness. Give our parts specialists a call at 1-888-280-7799 and they can help figure out which part or repair kit you need.
- Nick at Pelican Parts
 
somsuri Comments: Can the VarioCam solenoid be replaced without removing the camshaft cover as indicatted in proj. 26? According to project 16 that seems not to be possible.
Boxster 2002, 2.7l
July 19, 2014
  Followup from the Pelican Staff: No, the cover has to be removed. - Nick at Pelican Parts  
Dave Comments: I was removing the plenum to clean when I noticed a sensor wire stuck in the passenger side plenum. It came out real easy. When I got ready to stick it back in, the wire is missing. I can't find this part in your catalogue. Can just the wire be replaced or the whole sensor? Thanks for the help!
July 7, 2014
  Followup from the Pelican Staff: Can you share a photo of the sensor and location? - Nick at Pelican Parts  
gaz Comments: hi have a Porsche boxster 2000 2.7 tiptronic s It is slow on acceleration from standstill seems to take a second or to respond to foot on accelerater pedal. I also get a slight backfire or popping sound . What could be the problem many thanks.
June 7, 2014
  Followup from the Pelican Staff: COuld be an engine misfire. I would start by checking the DME for fault codes. If the system is not working properly, a fault code will be set. This will be your best bet when diagnosing.
- Nick at Pelican Parts
 
yemington Comments: Greetings,
Is there an after-market oil pressure gauge/sender for a 2000 S?
Thanks!
May 27, 2014
  Followup from the Pelican Staff: There should be a kit available for your vehicle. Give our parts specialists a call at 1-888-280-7799. They can help you find the right part.
- Nick at Pelican Parts
 
CMS Comments: I have a 2002 Boxster that was running fine until I stalled it on accident by letting the clutch out while in reverse with the safety brake on. On re-start it is misfiring with a blinking CEL, and is giving a P1397 cam sensor 2 code. Didn't hear anything nasty when it stalled, was thinking the sensor went bad, your thoughts? Also, where is the bank 2 sensor on the 2002? Is it on the drivers side or passenger side head, toward the front or back, and is it on the same surface as the coli packs or accessed through the engine cover on top?

Any help is appreciated, telling me its easy to get to is more appreciated.

Best Regards..
October 28, 2013
  Followup from the Pelican Staff: The sensor is located on the top of the left side cylinder head.

I would be more suspicious of mechanical engine timing that the camshaft sensor. If you replace or test the sensor and find it to be good, the next step would be to check mechanical engine timing. - Nick at Pelican Parts
 
CCorey Comments: Getting fault code P1397 on 2000 996 C4. Can't figure out how to get to sensor with out dropping engine. Is thereanother way to get to it ?
October 14, 2013
  Followup from the Pelican Staff: Not sure what kind of vehicle you have, but here is some general info on the M96 engine:

There are two camshaft position sensors, depending on which side of the engine you are replacing it on the procedure varies. On the right side, remove the A/C compressor, then you can access the sensor.

For the left side sensor, you will have to remove the left side intake manifold runners. Once removed you can remove the sensor.- Nick at Pelican Parts
 
Nick Comments: I can't locate the crank sensor, on my Porsche boxster .
I need step by step instructions to replace. From start to finish.Becuase I have been under the car near the right wheel I can't find it.
Please help me.
October 12, 2013
  Followup from the Pelican Staff: See attached photo for location of sensor. This is from our forums and shows the sensor location with the transmission removed. You don't have to remove the transmission, it was out when the photo was taken.


If you step by step instructions, try this repair manual:
https://www.pelicanparts.com/catalog/ShopCart/BOOK/POR_BOOK_bkptec_pg10.htm

- Nick at Pelican Parts
Bags Comments: What are the Voltage output specs for the wiring harness leads to the crankshaft sensor? Im getting 12 volts in the center? And 5 on one side then ground on the 3rd. Is this correct?
Porsche Boxster 2002 Thank you for the help
September 17, 2013
  Followup from the Pelican Staff: That sounds correct. Now check for a digital signal when the engine is rotating. It will be a 5 or 12 volt square wave. - Nick at Pelican Parts  
GregM Comments: Hi,
I started my 986 engine, drove around the block then engine stalled and it wasn't able to restart. Codes said MAF error and missfires one one bank only. MAF sensor is brand new OEM from Pelican. Next day, engine restarted with the old MAF sensor but still runs on one bank only. Replaced then the camshaft sensor. Engine runs better but still gets missfires between 2 and 3000rpm randomly. Any idea what should I try next?
August 30, 2013
  Followup from the Pelican Staff: I would start by checking the DME for fault codes. If the system is not working properly, a fault code will be set. This will be your best bet when diagnosing an engine misfire. Isolate the cylinders and check them for spark, fuel and compression.
With that said, it also wouldn't hurt to check crankcase vacuum to see if the AOS has failed. - Nick at Pelican Parts
 
Ken Comments: Hi , my 2007 porsche boxster has a failure temperature indicater reading. Is it because of the engine bay temperature sensor? can u tell me please tell me where is the location of the engine bay temperature sensor and how to change it? Part number 997 606 213 00. Thanks
August 27, 2013
  Followup from the Pelican Staff: Temperature indicator failure warning message could be a few things. This message can be set by a few things, the engine being too hot, too cold or not warming up fast enough. First check that your coolant level is correct. Once you confirm the coolant level is correct, check that the engine is warming up correctly, not taking too long and not overheating. It could also be from a faulty sensor sending an erratic signal. - Nick at Pelican Parts  
Pete Comments: Hi, congrats with your explanations... we here in Europe also use them...
Have a question though... want to install VDO instruments DIN mid console : oil temperature, oil pressure and voltage. I need the ones with the white dials. Do you know which ones go best with the white cluster of my boxster, especially when illuminated. Also, I need to install an extra oil temperature sender. Are there possibilities ?

Best regards
July 13, 2013
  Followup from the Pelican Staff: Give our parts specialists a call at 1-888-280-7799 and they can help figure out which part or repair kit you need.
- Nick at Pelican Parts
 
Ricey Comments: Figure 4 "The purple arrow shows the crank angle sensor or flywheel sensor"

For the crank position sensor, can you advise what type of bolt is holding the sensor in? Need to know the length also
August 14, 2012
  Followup from the Pelican Staff: My reference shows a 6MM X 16 MM. It should be a torx bolt. I recommend getting a set of torx if you are working on your Boxster. Various sizes are used.

- Denny at Pelican Parts
 
DLB Comments: My car is making a humming sound but only once in awhile. I believe it has something to do with the fuel system because when I engage the accelerator it goes away. Not sure what it may be. Car 2002 Boxster 2.7

Another question: I replaced the four O2 sensors are there any adjustments that are required?
June 20, 2012
  Followup from the Pelican Staff: There are no adjustments needed for the oxygen sensors after replacement. If you had a check engine light on it will need to be reset. You should diagnose that humming sound. AOS, belt or idler rollers, fuel pump failing if humming is in the front trunk? Just a start, check our articles for further diagnostic procedures.

- Denny at Pelican Parts
 
leigh Comments: Aloha Wayne & Pelican Parts-
I have an '01 Boxster. My problem started when it wouldn't start up. The battery seemed to have enough power & cranked the engine but, it just wouldn't start.
A half hour it started.
I thought maybe it was a weak battery so I replaced the battery.
Upon starting the car I noticed my idle was irregular, i.e. the tach/rpm would surge up & down. When I depress the accelerator it seems to run smooth.
Could it be the oxygen sensor or idle air control?
Thanks so much for always sharing!

take care- leigh
October 3, 2011
  Followup from the Pelican Staff: Yup, unfortunately it could be one of a hundred things. I would check the fuel injection trouble codes - the computer is bound to be putting out some errors that will assist you in figuring out the problem. - Wayne at Pelican Parts  
willie Comments: Hi I,m looking for a camshaft timing advanced solenoide which is pictured in your photes, i cant seem too find one, as mine has wires broken off.
September 5, 2011
  Followup from the Pelican Staff: This camshaft solenoid is used to advance the timing of the camshafts, and there is a different one for the left or right banks:

996-605-901-00 Solenoid Valve for cylinder 1-2-3
996-605-902-00 Solenoid Valve for cylinder 4-5-6

Both of these can be ordered from our catalog, at the bottom or this page: http://www.pelicanparts.com/catalog/shopcart/986M/POR_986M_ENGcam_pg2.htm
- Wayne at Pelican Parts
 
agogo Comments: Hi,
My 987.1 S show Failure oil level indicator when I started my car and after the 6 seconds oil level checking. Should I replace the oil level sender. This problem is exist on last week after my engind overheat at 120 degree for one minunite because of my car don't have enough coolant. What should I do, hope anyone can teach me!
July 23, 2011
  Followup from the Pelican Staff: Hmm, this sender can sometimes fail or give bad readings when coolant mixes with the oil. I would pull the sender and replace it, or at least try removing it to clean it. Then see if the error message is still there. Also check your oil and coolant for signs of them mixing together (which is bad). - Wayne at Pelican Parts  

  Search our site:    

View Cart & CheckOut | Project List | Order Status |  Help    

 

[Home] [Customer Service] [Shopping Cart] [Project/Wish List]
  [Privacy Statement]  [Contact Us] [About Us] [Shipping] [Careers]

Copyright © Pelican Parts Inc. -    DMCA Registered Agent Contact Page

Page last updated: Sat 12/3/2016 02:11:07 AM