What does code P2A10 mean?

Q: What does code P2A10 mean?

O2 Sensor Negative Voltage Bank 2 Sensor 2. P2A10 indicates that the powertrain control module (PCM) has detected a negative voltage signal from the downstream oxygen sensor on bank 2, which monitors the catalytic converter on the side of the engine that does not contain cylinder number one. The PCM expects this sensor to produce a voltage between approximately 0.1 and 0.9 volts, so a reading below zero volts signals a circuit fault, a sensor failure, or a reference voltage problem.

DTC codes / P2Axx · Hybrid propulsion / P2A10

P2A10O2 Sensor Negative Voltage Bank 2 Sensor 2

P2A10 indicates that the powertrain control module (PCM) has detected a negative voltage signal from the downstream oxygen sensor on bank 2, which monitors the catalytic converter on the side of the engine that does not contain cylinder number one. The PCM expects this sensor to produce a voltage between approximately 0.1 and 0.9 volts, so a reading below zero volts signals a circuit fault, a sensor failure, or a reference voltage problem.

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.