VOLVO
ECM-P022082 - Throttle/Pedal Position Switch B Circuit. Bus Signal / Message Failures. Alive / sequence counter incorrect / not updated
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
7 modelsS60 (2011–), S80 (2007–), V60 (2011–), V70 (2008–), XC60 (2009–), XC70 (2008–), XC90 (2003–)
Show models by year and engine (12)
- Volvo S60 (2011–)2011–2014Engine B6304T4 only
- Volvo S60 (2011–)2015Engine B6304T3, B6304T4, B6304T5 only
- Volvo S80 (2007–)2007Engine B6324S, B8444S only
- Volvo S80 (2007–)2008–2009Engine B6304T2, B6324S, B8444S only
- Volvo V60 (2011–)2011–2014Engine B6304T4 only
- Volvo V60 (2011–)2015Engine B6304T3, B6304T4, B6304T5 only
- Volvo V70 (2008–)2008–2009Engine B6304T2, B6324S only
- Volvo XC60 (2009–)2009–2010Engine B6304T2 only
- Volvo XC60 (2009–)2011–2015Engine B6304T4 only
- Volvo XC70 (2008–)2008Engine B6324S only
- Volvo XC70 (2008–)2009Engine B6304T2, B6324S only
- Volvo XC90 (2003–)2007–2010Engine B6324S only
What does this fault code mean?
The engine control module (ECM) monitors communication with the central electronic module (CEM) on the CAN network, which carries the accelerator pedal position. The code means that messages from the CEM lack a correct sequence counter or are not being updated, that is, the counter that should change with each new message does not match. This points to a communication fault, for example in a wire or connector.
Possible causes
- Open circuit in the communication wire
- Communication wire shorted to ground
- Communication wire shorted to supply voltage
- Contact resistance or oxidation in the connections
- Open circuit in the connections
- Short circuit in the connections
What you can do
- 1Read the codes in all control modules. Several codes at once often point to a communication fault on the CAN network
- 2Check that the battery is fully charged and that the battery terminals and earth connections are clean and tight
- 3Gently shake the wiring harness and connectors with the ignition on and see whether the fault appears. A loose connection may be the cause
- 4Check that the fuses are intact. Fuse locations are shown in the owner's manual
- 5Do not replace the central electronic module (CEM) for a CAN fault unless troubleshooting has shown that it is faulty
- 6Have a workshop measure on the CAN network with diagnostic equipment and find which control module is disrupting communication
Symptoms you may notice2
- Message in the information display
- Accelerator pedal ignored when the brake is applied
What the fault can affect1
- When the brake pedal is pressed at the same time, the accelerator is treated as released
General guidance for car owners. Diagnosis on the car can point to a different cause.