VOLVO
ECM-P055600 - Brake Booster Pressure Sensor Circuit Range/Performance. General Failure Information. No sub type information
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
9 modelsC30 (2007–2013), S40 (2004–2013), S60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V50 (2004–2013), V60 (2011–), V70 (2008–)
Show models by year and engine (9)
- Volvo C30 (2007–2013)2011–2013Engine D4162T only
- Volvo S40 (2004–2013)2011–2012Engine D4162T only
- Volvo S60 (2011–)2011–2015Engine D4162T only
- Volvo S80 (2007–)2012–2015Engine D4162T only
- Volvo V40 (2013–)2013–2015Engine D4162T only
- Volvo V40 Cross Country (2013–)2013–2015Engine D4162T only
- Volvo V50 (2004–2013)2011–2012Engine D4162T only
- Volvo V60 (2011–)2011–2015Engine D4162T only
- Volvo V70 (2008–)2012–2015Engine D4162T only
What does this fault code mean?
The ECM monitors the vacuum pressure sensor, which measures the negative pressure in the brake booster. If the vacuum is too low while driving, automatic engine start/stop is not allowed. The fault may be a loose or oxidized connector, or a damaged sensor.
Possible causes
- Loose or oxidized connector contact
- Damaged vacuum pressure sensor
What you can do
- 1Check that the vacuum pressure sensor connector is secure and not oxidized
- 2Check that the hose between the engine and the brake booster is secure and not kinked or damaged
- 3If you have a diagnostic tool, read the vacuum pressure in live data with the engine running and see whether the value is steady
- 4Clear the code and start the engine to see whether it returns
- 5Do not work on the brake booster yourself; if the fault returns, have a workshop check the vacuum pressure sensor with diagnostic equipment
Symptoms you may notice1
- Automatic engine start/stop does not work, both while driving and at idle
What the fault can affect2
- The module uses a vacuum value that corresponds to no vacuum
- Automatic engine start/stop is switched off
General guidance for car owners. Diagnosis on the car can point to a different cause.