P2A07 Possible Causes
- Faulty O2 sensor, bank 1 sensor 2
- O2 Sensor Bank 1 Sensor 2 harness is open or short-circuited
- Poor electrical connection in the Bank 1 Sensor 2 O2 sensor circuit
How to Fix Code P2A07
Check the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
Check Engine Light on (or Service Engine Soon warning light)
P2A07 Meaning
The Engine Control Module (ECM) monitors the negative voltage signal from the O2 sensor. The ECM sets the OBDII code when the O2 sensor’s negative voltage is outside factory specifications.