VOLVO
ECM-P001921 - Crankshaft Position - Camshaft Position Correlation - Bank 2 Sensor B. General Signal Failures. Signal too low
System
Motorstyring (ECM)
Volvo-modeller feilkoden gjelder for
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1 modellS80 (2007–)
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Hva betyr feilkoden?
The engine control module compares the exhaust camshaft position with the crankshaft position and adjusts the adaptation when they do not agree. The code indicates a signal that is too low in bank 2, sensor B, and is set when the adaptation changes by more than a certain amount.
Mulige årsaker
- Incorrectly set camshafts
- Damaged VVT unit
Hva du kan gjøre
- 1Read the code and note whether it is active right now or only stored
- 2If you have a diagnostic tool: read the exhaust camshaft adaptation for bank 2 in live data with the engine running
- 3Check the connector at the exhaust camshaft sensor for loose or oxidised parts
- 4Check the engine oil level and that the oil is clean and of the right quality
- 5Have a workshop check the camshaft basic setting
- 6If the fault returns: have a workshop clean the control valve, or fit a new one, and check the VVT unit
Symptomer du kan merke5
- The car lacks power, especially when pulling away from standstill
- Engine does not start, the starter motor cranks it
- Engine is hard to start and cranks slowly
- Uneven idle
- Engine hesitates or runs jerkily when slowing down
Hva feilen kan påvirke1
- The control module uses a fixed value for the camshaft adaptation
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