VOLVO
ECM-P022100 - Throttle/Pedal Position Switch B Circuit Range/Performance. General Failure Information. No sub type information
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:
5 modelsS80 (2007–), V70 (2008–), XC60 (2009–), XC70 (2008–), XC90 (2003–)
Show models by year and engine (10)
- Volvo S80 (2007–)2007Engine D5244T4, D5244T5 only
- Volvo S80 (2007–)2008–2009Engine B4204S3, B4204S4, D5244T4, D5244T5 only
- Volvo S80 (2007–)2010–2011Engine B4204S3, B4204S4, D4164T only
- Volvo V70 (2008–)2008–2009Engine B4204S3, B4204S4, D5244T4, D5244T5 only
- Volvo V70 (2008–)2010–2011Engine B4204S3, B4204S4, D4164T only
- Volvo XC60 (2009–)2009All engines except: B6304T2
- Volvo XC70 (2008–)2008All engines except: B6324S
- Volvo XC70 (2008–)2009Engine D5244T4, D5244T5 only
- Volvo XC90 (2003–)2005–2011Engine B8444S only
- Volvo XC90 (2003–)2013–2014Engine D5244T18, D5244T5 only
What does this fault code mean?
The engine control module (ECM) receives both a PWM signal and an analogue signal from the accelerator pedal position sensor. The fault is set when the PWM signal is incorrect or when the voltage from throttle potentiometer 2 is outside the permitted range. The fault can cause poor throttle response and a reduced top speed.
Possible causes
- Loose or high-resistance connections on the PWM signal wire
- Interference on the PWM signal wire
- Damaged accelerator pedal position sensor
- Damaged potentiometer 2 in the throttle unit
What you can do
- 1Read the code, clear it and road test to see whether it returns
- 2If you have a diagnostic tool: read the accelerator pedal position sensor signals in live data with the ignition on, and see whether they change when you press and release the pedal
- 3Check that the fuses are intact. Fuse locations are shown in the owner's manual
- 4Check the accelerator pedal connector and wiring for loose connections, contact resistance and oxidation
- 5Use a multimeter to check that the pedal signal wire has no loose contact or break
- 6If the fault remains, have a workshop check the accelerator pedal position sensor and potentiometer 2 in the throttle unit with diagnostic equipment
Symptoms you may notice4
- Message in the information display
- Poor response from the accelerator pedal
- Accelerator pedal ignored when braking
- Warning symbol and text message in the display
What the fault can affect2
- Engine output is limited
- The maximum vehicle speed is reduced
General guidance for car owners. Diagnosis on the car can point to a different cause.