Volvo 850, S70, V70, C70 – How to replace Camshaft Position Sensor

by: Alexandra M.

You can follow this tutorial if you’re about to replace the camshaft position sensor (CMP) in a Volvo 850 (1991-1997), S70 V70 (1997 – 1999) or C70 (1997-1999) with 5 cylinder Petrol engine.

Symptoms of a bad camshaft position sensor is engine intermitent or permanent failing to start, altough it would crank well.

Diagnostic codes usually thrown when the camshaft position sensor goes bad are  3-1-4 and 3-2-4, on pre -96 cars with the code socket reader, or P0340 on cars with OBD1 diagnostic socket.

Required new parts

– New Camshaft Position Sensor (Volvo P/N 9146108 or Bosch 0 232 101 030).

Required tools

  1. Flat screw driver
  2. Torx T40 tool

Camshaft position sensor replacement tutorial

Step 1. The camshaft sensor is located after the distributor on the top left side of the engine. To gain access to the camshaft position sensor you’ll need to remove the air filter box cover (Follow this instructions on how to remove air filter box in Volvo 850 / S70 / V70 / C70). Once it’s removed, you’ll see the sensor on the side of the block

volvo 850 s70 v70 c70 Camshaft position sensor replacement step1

Step 2. Disconnect the camshaft position sensor. Follow the camshaft psoition sensor cable until you found the connector. Once you’ve found it, press the metal spring (it’s facing down) on the black plug and push it forwards the front of the car disconnecting it.

volvo 850 s70 v70 c70 Camshaft position sensor replacement step2

Step 3. With the plug out, use a flat screwdriver to release the connector metal support from the engine. Insert the screwdriver between the two metal tabs and rotate it to release the support.

volvo 850 s70 v70 c70 Camshaft position sensor replacement step3

Step 4. Now, with a T40 Torx bit remove the two screws holding the sensor in place and remove the sensor from the engine.

volvo 850 s70 v70 c70 Camshaft position sensor replacement step4

Note that the lower screw also holds the vacuum hoses metal holder. Be sure to carefully place it when re-installing.

volvo 850 s70 v70 c70 Camshaft position sensor replacement step4_1

Step 5. With the old and the new sensor side by side, remove the connector metal support from the old one, and install it on the new one.

volvo 850 s70 v70 c70 Camshaft position sensor replacement step5

New sensor connector with the metal support installed

volvo 850 s70 v70 c70 Camshaft position sensor replacement step5_1

Step 6. Now, it’s just a matter of installing the new sensor, inverting the steps above. Don’t forget to plug in the sensor connector and the MAF connector.

The instructions in this tutorial will work in the following models / years:
– 1991,1992, 1993, 1994, 1995, 1996 and 1997 Volvo 850 Petrol and Diesel Engines
– 1997, 1998 and 1999 Volvo S70 Petrol and Diesel Engines
– 1997, 1998 and 1999 Volvo V70 Petrol and Diesel Engines
– 1997, 1998 and 1999 Volvo C70 Coupe and Convertible / Cabrio Petrol Engines