DTC P0134 Or DTC P0154

Code Definition

DTC P0134: Rear Air Fuel Ratio Sensor Heater System Malfunction (Bank 1, Sensor 1)
DTC P0154: Front Air Fuel Ratio Sensor Heater System Malfunction (Bank 2, Sensor 1)

CAUTION: When substituting or replacement of PCM is recommended, see PCM REMOVAL & REPLACEMENT for important precautions.

NOTE: This test covers both Front and Rear Air Fuel Ratio (A/F) sensors. The information will be shown Rear (Bank 1) first and Front (Bank 2) second. When discussion of PCM harness connector terminals arises, Rear (A/F) ratio sensor terminals will precede Front A/F ratio sensor terminals. Also, Front A/F ratio sensor terminal information will be enclosed in parantheses ( ).

NOTE: If DTC P1153, P1155, (P1173) and/or (P1175) is set at the same time as DTC P0134 and/or (P0154), troubleshoot DTC P1153, P1155, (P1173) and/or (P1175) first, then recheck for DTC P0134 and/or (P0154).

Turn ignition on. Using Honda PGM Tester or the HDS, do the DTC CLEAR in the CLEAR menu.
Start engine with no load (A/T in Park or Neutral). Run until the radiator fan comes on, then let engine idle.
Check for Temporary DTCs or DTCs in the DTC menu. If DTCs P0134 and/or (P0154) are set, go to next step. If DTCs P0134 and/or (P0154) are not set, check for poor connections or loose terminals at A/F sensor (Sensor 1) and PCM connector.
Turn ignition off.
Replace Air Fuel Ratio sensor.
Turn ignition on. With the Honda PGM tester or the HDS, do PCM RESET in the CLEAR menu. Do the PCM idle learn procedure. See PCM IDLE LEARN PROCEDURE .
Start engine with no load (A/T in Park or Neutral). Run until the radiator fan comes on, then let engine idle.
Check for Temporary DTCs or DTCs in the DTC menu. If DTCs P0134 and/or (P0154) are set, check for poor connections or loose terminals at A/F sensor (Sensor 1) and PCM connector, go to step 1 . If any other Temporary DTCs or DTCs are set, troubleshoot those indicated. If there are no Temporary DTCs or DTCs set, go to next step.
Using the Honda PGM Tester or the HDS, monitor OBD STATUS for DTCs P0134 and/or (P0154) in the DTCs menu. If it is PASSED, troubleshooting is complete. If it FAILED, check for poor connections or loose terminals at A/F sensor (Sensor 1) and PCM connector Go to step 1 . If it is NOT COMPLETED, go to step 7 and recheck.