VOLVO
ECM-P193500 - Brake Switch/Sensor Signal. General Failure Information. No sub type information
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
5 modelsS80 (2007–), V70 (2008–), XC60 (2009–), XC70 (2008–), XC90 (2003–)
Show models by year and engine (15)
- Volvo S80 (2007–)2007Engine D5244T4, D5244T5 only
- Volvo S80 (2007–)2008Engine D4204T, D5244T4, D5244T5 only
- Volvo S80 (2007–)2009Engine D4204T, D5244T10, D5244T4, D5244T5 only
- Volvo S80 (2007–)2010Engine D4164T, D4204T, D5244T10, D5244T14, D5244T19 only
- Volvo S80 (2007–)2011Engine D4164T only
- Volvo V70 (2008–)2008Engine D4204T, D5244T4, D5244T5 only
- Volvo V70 (2008–)2009Engine D4204T, D5244T10, D5244T4, D5244T5 only
- Volvo V70 (2008–)2010Engine D4164T, D4204T, D5244T10, D5244T14, D5244T19 only
- Volvo V70 (2008–)2011Engine D4164T only
- Volvo XC60 (2009–)2009All engines except: B6304T2
- Volvo XC60 (2009–)2010Engine D5244T10, D5244T14, D5244T16 only
- Volvo XC70 (2008–)2008All engines except: B6324S
- Volvo XC70 (2008–)2009Engine D5244T4, D5244T5 only
- Volvo XC70 (2008–)2010Engine D5244T10, D5244T14, D5244T16 only
- Volvo XC90 (2003–)2013–2014Engine D5244T18, D5244T5 only
What does this fault code mean?
The engine control module (ECM) verifies that the brake pedal sensor and the stop lamp switch give reliable and matching signals. The code is set by disturbances on the brake light signal, when the brake pedal is activated without a brake light signal arriving, or when the signals do not correspond. It can also be set by a problem in the brake control module (BCM).
Possible causes
- Open circuit, or a short to earth or to supply voltage, in the cable to the stop lamp switch
- Incorrectly installed or damaged stop lamp switch
- Contact resistance, oxidation or loose connections at the stop lamp switch or brake pedal position sensor
- Damaged brake pedal position sensor
- Low battery voltage
- Fault in the brake control module (BCM) or in the CAN network, such as an open or short circuit in one of the cables
What you can do
- 1Check that the fuses for the brake lights and control modules are intact
- 2Test that the brake lights come on when the brake pedal is pressed
- 3Check that the connectors at the brake pedal and the stop lamp switch are secure and free from oxidation and damage
- 4If you have a diagnostic tool: check in live data how the brake pedal position and the brake light signal follow each other when the pedal is pressed and released
- 5If the brake pedal or brake lights behave abnormally, have the car checked by a workshop before it is driven further
Symptoms you may notice2
- Cruise control does not work and cannot be engaged
- Warning symbol and text message shown in the driver information display
What the fault can affect1
- Cruise control is switched off while the fault is active
General guidance for car owners. Diagnosis on the car can point to a different cause.