What does code P2A06 mean?

Q: What does code P2A06 mean?

O2 Sensor Circuit Range/Performance Bank 1 Sensor 4. P2A06 means the powertrain control module (PCM) has detected that the downstream oxygen sensor on bank 1, sensor 4, is not switching or responding within the range and performance window the computer expects during its self-tests. The PCM compares the sensor's signal against other oxygen sensors and operating conditions, and it flags this code when the signal stays too flat, too slow, or outside the expected voltage range for the current engine load.

DTC codes / P2Axx · Hybrid propulsion / P2A06

P2A06O2 Sensor Circuit Range/Performance Bank 1 Sensor 4

P2A06 means the powertrain control module (PCM) has detected that the downstream oxygen sensor on bank 1, sensor 4, is not switching or responding within the range and performance window the computer expects during its self-tests. The PCM compares the sensor's signal against other oxygen sensors and operating conditions, and it flags this code when the signal stays too flat, too slow, or outside the expected voltage range for the current engine load.

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.