Engine Controls - MIL ON/DTC P0134/P0135/P0171/P1157

08-067

July 7, 2009

Applies To:
See VEHICLES AFFECTED

MIL Comes On With DTC P0134, P0135, P0171, or P1157

(Supersedes 08-067, dated September 16, 2008, to revise the information marked by the black bars and asterisks)

*REVISION SUMMARY

Under VEHICLES AFFECTED, certain 2009 CR-V models were added.*

SYMPTOM

The MIL comes on with one of these DTCs:

^ P0134 (air fuel ratio [A/F] sensor [sensor 1] heater system malfunction)

^ P0135 (air fuel ratio [A/F] sensor [sensor 1] heater circuit malfunction)

^ P0171 (fuel system too lean)

^ P1157 (air fuel ratio [A/F] sensor [sensor 1] AFS circuit high voltage)

PROBABLE CAUSE

Under-hood temperature causes grease from an under-hood fuse box connector to melt, travel down through the engine wire harness, and drip onto the A/F sensor 4P connector.





VEHICLES AFFECTED

CORRECTIVE ACTION

Replace the A/F sensor, and install a subharness kit.

PARTS INFORMATION

A/F Sensor:
P/N 36531-RZA-003, H/C 8404519

Subharness Kit (includes subharness and a wire tie):
P/N 06322-SWA-305, H/C 9050097

WARRANTY CLAIM INFORMATION

In warranty:
The normal warranty applies.

Operation Number: 1201F5

Flat Rate Time: 0.5 hour

Failed Part: P/N 36531-RZA-003
H/C 8404519

Defect Code: 03214

Symptom Code: 03203

Skill Level: Repair Technician

Out of warranty:
Any repair performed after warranty expiration may be eligible for goodwill consideration by the District Parts and Service Manager or your Zone Office. You must request consideration, and get a decision, before starting work.

REPAIR PROCEDURE





1. Open the hood, and locate the right branch of the engine harness. (It's attached to the right side frame rail, near the P/S feed hose.) Detach the engine harness from the frame rail by cutting through the harness body clip. Discard the body clip.

2. Raise the vehicle on a lift, and make sure it's securely supported.





3. Remove the A/F sensor:

^ Disconnect the 4P connector.

^ Remove the sensor with an 02 sensor wrench (Snap-on S3176, or equivalent). The sensor will not be reused.

4. Install a new A/F sensor, and torque it to 44 N.m (33 lb-ft). Do not connect the sensor's 4P connector yet.





5. Disconnect the engine harness 4P connector from its clip.





6. Connect the engine harness 4P connector to the new subharness 4P connector (the connector that's taped to the subharness).

7. Attach the new subharness to the body rail with its body clip.





8. Connect the A/F sensor 4P connector to the connector on the end of the new subharness. Attach the connector to the harness clip.

9. Wire-tie the new subharness to the engine harness as shown. The loop in the subharness prevents grease from getting into the A/F sensor connector.





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