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This fault occurs on a 2003 Peugeot 807 with 2.0 litre HDi diesel engine, 75000 miles. Cambelt snapped, went through the nightmare of seized injectors, rebuilt engine. Starts first time but lacks power especially when cold, occasionally recovers and drives perfectly with good torque and bags of power between 2-3000 revs. Engine management light currently on, although it went off when engine recovered temporarily. Returns code P0020 (although this engine does not have variable valve timing (!!?*?). Do Peugeot assign this code to a different fault?

When I stripped it down the swirl control flaps had completely seized in the head with carbon with the result that the swirl diaphragm arm had snapped. All cleaned/repaired and working smoothly.

Had injectors professionally checked - ok.
Double/triple checked all vacuum hoses.
EGR valve blanked off - passed emissions on MOT.
Removed turbo with engine in situ, stripped down - all seemed ok.
Rudimentary check of turbo pressure - disconnected turbo hose to inlet with engine running - good pressure.

Running out of resilience and love for this engine! Come back 1.9 dt engine! If it weren\'t for the remote sliding side doors (best thing ever!) would have dumped it long ago.

Any ideas please?

Thanks

Mike

Vehicle: 2003 Peugeot 807 2.0 HDi

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The P0020 code on a Peugeot 807 with a 2.0 HDi diesel engine could be caused by a number of things, including:

  • A faulty camshaft position sensor
  • A faulty oil control valve (OCV)
  • A wiring problem
  • A problem with the engine control unit (ECU)

Since you have already checked the injectors and turbo, I would recommend checking the camshaft position sensor and OCV next. The camshaft position sensor is responsible for detecting the position of the camshaft, which is used by the ECU to control the timing of the fuel injection and ignition. The OCV is responsible for controlling the flow of oil to the camshaft actuators, which are used to adjust the timing of the camshaft.

If the camshaft position sensor or OCV is faulty, it can cause the engine to run poorly and set the P0020 code.

Here are some specific things you can check:

  • Check the camshaft position sensor for any signs of damage.
  • Measure the resistance of the camshaft position sensor. If the resistance is not within the specified range, the sensor is faulty and needs to be replaced.
  • Check the wiring harness for the camshaft position sensor for any signs of damage.
  • Check the oil control valve for any signs of damage.
  • Measure the resistance of the oil control valve. If the resistance is not within the specified range, the valve is faulty and needs to be replaced.

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