VOLVO
ECM-P252700 - Vacuum Reservoir Pressure Sensor Circuit Low. General Failure Information. No sub type information
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
8 modelsS60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V70 (2008–), XC60 (2009–), XC70 (2008–)
Show models by year and engine (8)
- Volvo S60 (2011–)2014–2015Engine B4204T10, B4204T11, B4204T12, B4204T15, B4204T9, D4204T5 only
- Volvo S80 (2007–)2014–2015Engine B4204T11, B4204T12, B4204T15, D4204T5 only
- Volvo V40 (2013–)2015Engine B4204T11, D4204T14 only
- Volvo V40 Cross Country (2013–)2015Engine B4204T11, D4204T14 only
- Volvo V60 (2011–)2014–2015Engine B4204T11, B4204T12, B4204T15, B4204T9, D4204T5 only
- Volvo V70 (2008–)2014–2015Engine B4204T11, D4204T5 only
- Volvo XC60 (2009–)2014–2015Engine B4204T10, B4204T11, B4204T12, B4204T15, B4204T9, D4204T5 only
- Volvo XC70 (2008–)2014–2015Engine B4204T11, D4204T5 only
What does this fault code mean?
The ECM reads the brake vacuum sensor, which sits in the brake booster. The code is stored when the signal is too low for a certain period. Possible causes are a signal wire shorted to ground, an open circuit in the signal wire or a damaged sensor.
Possible causes
- Signal cable short-circuited to ground
- Open circuit in the signal cable
- Damaged brake vacuum sensor
What you can do
- 1If you have a diagnostic tool, read the brake vacuum sensor value in live data with the engine running and see whether it changes when the brake pedal is pressed
- 2Check that the relevant fuses are intact
- 3Check the connector at the brake vacuum sensor for contact resistance and oxidation
- 4Use a multimeter to check that the signal wire to the brake vacuum sensor has no open circuit and is not short-circuited to ground (body)
- 5Have a workshop carry out the further checks of the brake vacuum sensor, since the brake booster is part of the braking system
Symptoms you may notice1
- No noticeable symptoms for the driver
What the fault can affect1
- The automatic engine start/stop function is switched off
General guidance for car owners. Diagnosis on the car can point to a different cause.