DTC P0155 Acura
Front Air Fuel Ratio (A F) Sensor (Bank 2, Sensor 1) Heater Circuit Malfunction
Front Air Fuel Ratio (A F) Sensor (Bank 2, Sensor 1) Heater Circuit Malfunction
Description
The execution time is continuous and the duration time is 2 seconds or more. Engine running and battery voltage at 10 volts or more. One of these 2 conditions must be met for at least 2 seconds: (1) No return signal HIGH is detected when the PCM output duty is less than 20%. (2) Return signal does not change when the PCM output duty is more than 20% and less than 80%. 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 (Sensor 1), the relay and the PCM
Open or Short Circuit between the A F sensors, the relay or PCM
Faulty (A F) Sensor (Bank 2, Sensor 1)
Video Guide
Diagnostic Info
- DTC Code: P0155
- Brand: Acura