VOLVO
ECM-2127 - Throttle/Pedal Position Sensor/Switch E Circuit Low
System
Engine Control Module (ECM)
Volvo models this fault code applies to
This fault code has different meanings depending on model, model year or engine. Select the meaning that applies to your car.
Applies to the following models:
4 modelsC30 (2007–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)
Show models by year and engine (5)
- Volvo C30 (2007–2013)2008–2010Engine D4204T only · Transmission MMT6, MPS6 only
- Volvo C70 (2006–2013)2008Engine D4204T only
- Volvo C70 (2006–2013)2009–2010Engine D4204T only · Transmission MMT6, MPS6 only
- Volvo S40 (2004–2013)2008–2010Engine D4204T only · Transmission MMT6, MPS6 only
- Volvo V50 (2004–2013)2008–2010Engine D4204T only · Transmission MMT6, MPS6 only
What does this fault code mean?
The pedal sensor's analogue signal runs to the central electronic module (CEM) and is passed to the engine control module over the CAN bus. The code is stored when the engine control module detects a signal that is too low, and the cause can be a contact fault, a CAN fault or a damaged sensor.
Possible causes
- Contact resistance or oxidation in the terminals
- Fault in CAN communication between the engine control module and the CEM
- Damaged accelerator pedal position sensor
What you can do
- 1Check that the fuses are intact; their location is given in the owner's manual
- 2Test the relevant functions with the buttons, controls or a test drive, to see whether the fault gives symptoms right now
- 3Check the connectors at the pedal and where the wiring joins for oxidation and contact resistance
- 4Have a diagnostic tool? Read the pedal value in live data while you slowly press the pedal, and check whether the value stays too low or jumps
- 5If the connectors are sound but the fault remains, have a workshop check the CAN communication to the CEM and replace the pedal sensor if needed
Symptoms you may notice1
- Text message and warning symbol in the display
What the fault can affect1
- Engine torque may be limited
General guidance for car owners. Diagnosis on the car can point to a different cause.