Acura DTC

Acura DTC P0133


Acura DTC




Rear Air Fuel Ratio (A F) Sensor (Bank 1, Sensor 1) Malfunction Slow Response


The execution time is once per drive cycle and the duration time is 6.8 seconds or more. Engine coolant temperature 156 ºF (69 ºC), Intake air temperature, Fuel trim, 0.73-1.47, Engine speed 1,250-2,200 rpm, Vehicle speed 33 mph or more. The total rear A F sensor output value is 11 or less in 6.5 seconds. NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot. Conditions for illuminating the MIL When a malfunction is detected during the first drive cycle, a Temporary DTC is stored in the PCM memory. If the malfunction recurs during the next (second) drive cycle, the MIL comes on and the DTC and the freeze frame data are stored.


  • Poor connections or loose terminals at the A F sensor (Sensor 1) and the PCMFaulty A F sensor (Sensor 1)

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