DTC P2271 Acura
Rear Secondary HO2S (Bank 1, Sensor 2) Circuit Signal Stuck Rich
Rear Secondary HO2S (Bank 1, Sensor 2) Circuit Signal Stuck Rich
Description
If, after current is applied to the rear secondary HO2S heater, the rear secondary HO2S does not fluctuate and the output is stuck within the specified area, a malfunction is detected. The rear secondary HO2S (bank 1, sensor 2) output voltage is 0.293 V or more. The execution time is once per driving cycle and the duration time is 36.3 seconds or more. NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot.
Cause and Solution
Poor connections or loose terminals at the secondary HO2S (Sensor 2) and the PCM
Video Guide
Diagnostic Info
- DTC Code: P2271
- Brand: Acura