P1167 ACURA, HONDA - RATIO SENSOR 1 HEATER SYSTEM MALFUNCTION
POST UPDATED IN June, 2023
P1167 ACURA, HONDA - RATIO SENSOR 1 HEATER SYSTEM MALFUNCTION
The Air/Fuel Ratio Sensor continuously monitors the oxygen that is in the exhaust gases being expelled from the engine. This data is relayed to the PCM, which accordingly adjusts the air/fuel ratio to achieve better engine efficiency. The temperature of these sensors is increased when it is required to take readings as soon as possible.
The P1167 OBDII fault code is a manufacturer-specific code. For most cases, it has to do with a problem with the air/fuel mixture and Oxygen Sensors. For Honda and Acura manufacturers, it means that an Air/Fuel Ratio Sensor 1 heater system failure has occurred. If the heater does not activate, or if the PCM terminal voltage is not enough while drawing power from the heater, it will be interpreted as a malfunction.
Reasons for setting the P1167 OBD2 diagnostic code on Acura and Honda:
To solve the DTC P1167 OBDII code, take into account the following steps: