DTC P0154 Acura
Front Air Fuel Ratio (A F) Sensor (Bank 2, Sensor 1) Heater System Malfunction
Front Air Fuel Ratio (A F) Sensor (Bank 2, Sensor 1) Heater System Malfunction
Description
The execution time is continuous and the duration time is 40 seconds or more. Battery voltage minimum 10.5 volts. Malfunction determination 1: The front A F sensor (bank 2, sensor 1) internal resistance value is 200 or more for at least 40 seconds right after the engine starts. Malfunction determination 2: The front A F sensor (bank 2, sensor 1) internal resistance value is 270 or more for at least 1.0 second. NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot.
Cause and Solution
Poor connections or loose terminals at the A F sensor (bank 2, Sensor 1), the under-hood fuse relay box (PGM-FI subrelay) and the PCM
Open circuit between the PCM and the A F sensor
Faulty A F Sensor (Bank 2, Sensor 1)
PCM needs to be updated with the latest software
Video Guide
Diagnostic Info
- DTC Code: P0154
- Brand: Acura