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Crankshaft Position Sensor Replacement
 
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Pelican Technical Article:

Crankshaft Position Sensor Replacement

Jared Fenton

Time:

3 hours3 hrs

Tab:

$50

Talent:

****

Tools:

Flathead screwdriver, 10mm socket and extensions

Applicable Models:

Volvo C30 T5 (2008-13)
Volvo C30 T5 R-Design (2008-13)

Parts Required:

Crankshaft position sensor

Hot Tip:

Work on a cool engine

Performance Gain:

The car will run again

Complementary Modification:

Replace coolant

The crankshaft position sensor (CPS) is responsible for providing the vehicle's computer (DME) with an input signal needed to insure that the ignition fires correctly in relation to the crankshaft position. The CPS is essentially a Hall effect sensor, meaning that it detects a magnetic field to send a signal to the DME. The CPS is mounted over the side of the flywheel and 'looks' for the field created by either a magnet or a ferrous plug mounted in the flywheel as it rotates through 360 degrees of rotation.

Based on the position of this plug on the flywheel (typically Top Dead Center (TDC) on cylinder number one), the DME can divide the signal by five and thus have the correct timing for each cylinder in the T5 engine. This same method is used on almost all modern engines, changing the parameters in the DME to account for the number of cylinders or other variables.

If the crank sensor fails completely, the engine simply won't run as the DME has no reference point to calculate from. Often times, a failing CPS can manifest as an engine that cranks and cranks for an extended period before firing, more so when the engine is hot. Often times, this will trigger a check engine light. I recommend using a scanner to check for any codes. Typically, this makes the diagnostic procedure much easier.

Shown here is the relative position (green arrow) of the crankshaft position sensor, below the upper intake tube.
Figure 1

Shown here is the relative position (green arrow) of the crankshaft position sensor, below the upper intake tube. You'll need to remove the intake tube and also the air filter housing to gain enough access. See our articles on Spark Plug and Coil Replacement as well as Air Filter Housing Removal for more information. Additionally, you'll need to drain the coolant from the engine, as one coolant hose must be moved. See our article on Coolant Flush and Replacement for more information.

After draining the coolant from the engine, loosen and remove the hose clamp (green arrow) holding the hose to the thermostat housing.
Figure 2

After draining the coolant from the engine, loosen and remove the hose clamp (green arrow) holding the hose to the thermostat housing. Pull the hose off and you will be able to lift the larger section of the hose (yellow arrow) up and over to the right. This will give you just enough access to locate and remove the crankshaft position sensor which is located back up under the hose (purple arrow).

Shown here is the crankshaft position sensor located on the very top of the transmission, right at the parting line of the engine.
Figure 3

Shown here is the crankshaft position sensor located on the very top of the transmission, right at the parting line of the engine. Release the locking tab (green arrow) and pull the electrical connector off. Now loosen and remove the 10mm nut (yellow arrow) holding the sensor in place. Now pull up on the sensor to release it from the mounting bore. It can be a bit difficult due to the lack of space. The new sensor is installed in the place of the old one. Make sure it is seated all the way down in the mounting bore.

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Comments and Suggestions:
D in the D Comments: I have recently been getting the crankshaft position sensor error code P0336 on my C30. I started getting the error code late last winter, but then it went away once the weather started warming up. I just started getting the error code again now that the temperature has dropped. Could there be something causing the error message besides the sensor itself?
November 20, 2016
  Followup from the Pelican Staff: Likely a failing sensor. Give The Pelican Parts parts specialists a call at 1-888-280-7799. They can figure out what part or repair kit you need.
- Nick at Pelican Parts
 
AHMED Comments: I SCAN MY VOLVO C30 T5 BY OBD2

IT SHOWING FAULT CODE P0016
CRANK-CAM POSITION SENSOR
LOCATION : BANK 1 SENSOR A

THAT IS CODE WHATS MEAN EXACTLY ?

November 9, 2016
  Followup from the Pelican Staff: That code is for the camshaft and crankshaft alignment. Check mechanical timing. - Nick at Pelican Parts  

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