toyota Workshop Repair Guides

Toyota Workshop Service and Repair Manuals

Customer Interest for Engine Control Module: > < MIL ON - DTC P1133 Updated (Oxygen Sensor Circuit)
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If the problem source cannot be identified after checking all affected areas according to the Repair Manual, the cause may be an A/F Sensor or
ECM logic malfunction. In this case, follow the procedure in the flowchart shown to determine which part needs to be replaced.

Replace the ECM only if the A/F Sensor in the vehicle was produced after August 31, 1999.

Customer Interest for Engine Control Module: > < MIL ON - DTC P1133 Updated (Oxygen Sensor Circuit)