What does code P2CA4 mean?

Q: What does code P2CA4 mean?

Particulate Filter Pressure Sensor Signals Swapped A/B. P2CA4 indicates that the engine control module has detected the electrical signals from the two particulate filter pressure sensors are swapped, meaning the sensor connected to the upstream port is reporting the downstream pressure and vice versa. The module compares the two sensor readings during key-on and running conditions and flags the code when their expected pressure relationships are inverted.

DTC codes / P2Cxx · Hybrid propulsion / P2CA4

P2CA4Particulate Filter Pressure Sensor Signals Swapped A/B

P2CA4 indicates that the engine control module has detected the electrical signals from the two particulate filter pressure sensors are swapped, meaning the sensor connected to the upstream port is reporting the downstream pressure and vice versa. The module compares the two sensor readings during key-on and running conditions and flags the code when their expected pressure relationships are inverted.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaHybrid propulsion

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.