VOLVO
ECM-P029921 - Turbocharger/Supercharger A Underboost Condition. General Signal Failures. Signal too low
System
Motorstyring (ECM)
Volvo-modeller feilkoden gjelder for
Gjelder følgende modeller:
7 modellerS60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V70 (2008–), XC60 (2009–)
Vis modeller per årsmodell og motor (20)
- Volvo S60 (2011–)2011Kun motor: B4164T, B4164T3, B4204T6, B4204T7
- Volvo S60 (2011–)2012–2014Kun motor: B4164T, B4164T2, B4164T3, B4204T7
- Volvo S60 (2011–)2015Kun motor: B4164T, B4164T2, B4164T3
- Volvo S80 (2007–)2010Kun motor: B4204T6
- Volvo S80 (2007–)2011Kun motor: B4164T, B4204T6, B4204T7
- Volvo S80 (2007–)2012–2014Kun motor: B4164T, B4164T2, B4204T6, B4204T7
- Volvo S80 (2007–)2015Kun motor: B4164T
- Volvo V40 (2013–)2013Kun motor: B4164T, B4164T3
- Volvo V40 (2013–)2014–2015Kun motor: B4164T, B4164T3, B4164T4
- Volvo V40 Cross Country (2013–)2013–2015Kun motor: B4164T
- Volvo V60 (2011–)2011Kun motor: B4164T, B4164T3, B4204T6, B4204T7
- Volvo V60 (2011–)2012–2014Kun motor: B4164T, B4164T2, B4164T3, B4204T7
- Volvo V60 (2011–)2015Kun motor: B4164T, B4164T2, B4164T3
- Volvo V70 (2008–)2010Kun motor: B4204T6
- Volvo V70 (2008–)2011Kun motor: B4164T, B4204T6, B4204T7
- Volvo V70 (2008–)2012–2014Kun motor: B4164T, B4164T2, B4204T7
- Volvo V70 (2008–)2015Kun motor: B4164T, B4164T2
- Volvo XC60 (2009–)2010Kun motor: B4204T6
- Volvo XC60 (2009–)2011–2012Kun motor: B4204T6, B4204T7
- Volvo XC60 (2009–)2013–2015Kun motor: B4204T7
Hva betyr feilkoden?
The code concerns a signal fault in the boost pressure control. The ECM compares the boost pressure measured by the sensor with the target value and stores the code when the pressure is below the target. The fault can only be detected when engine speed and load are high enough. It may be caused by the turbo control valve, hoses in the system or the sensor.
Mulige årsaker
- Damaged turbo control valve, or incorrect setting on the wastegate valve's pressure actuator
- Damaged or sticking wastegate valve, or a damaged pressure actuator for it
- Hoses between the wastegate valve's pressure actuator and the turbo control valve that are loose, clogged or damaged
- Hoses between the turbo control valve and the charge air pipe that are clogged or damaged
- Damaged outside temperature sensor
- Damaged boost pressure sensor (TMAP)
Hva du kan gjøre
- 1Read and note the fault code, clear it and test drive to see whether it returns
- 2Check the hoses between the wastegate valve's pressure actuator, the turbo control valve and the charge air pipe for looseness, blockage and damage
- 3Check that the wastegate valve and its pressure actuator work and are not sticking
- 4If you have a diagnostic tool: read the boost pressure in live data while driving and check that it follows the throttle
- 5Check the connector to the boost pressure sensor for contact resistance and oxidation
- 6With the ignition off and the connector disconnected, use a multimeter to check that the signal wire to the boost pressure sensor is not short-circuited to ground
Symptomer du kan merke1
- The car lacks power
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