|
|
(P0138) O2 SENSOR 2/2 CIRCUIT OPEN (CONTINUED) When Monitored and Set Condition • When Monitored: With the engine running between 1000 and 2000 RPM, engine load between 15% to 50%, • Set Condition: O2 Sensor voltage is less than 0.15 volt for approximately 5 seconds. Signal stays at center: POSSIBLE CAUSES O2 SENSOR SIGNAL CIRCUIT OPEN O2 SENSOR SIGNAL CIRCUIT SHORT TO GROUND O2 SENSOR GROUND CIRCUIT OPEN ENGINE EXHAUST LEAK O2 SENSOR POWERTRAIN CONTROL MODULE For a complete Powertrain Control Module Circuit Diagram, (Refer to 9 - ENGINE - SCHEMATICS AND DIA- Diagnostic Test 1. CHECK FOR CURRENT DTC Turn the ignition on. With the DRB III T , read PCM DTCs. Is this DTC present? Yes >> For complete diagnosis of this DTC, refer to (P0131) O2 SENSOR 1/1 CIRCUIT LOW. No >> Go To 2 2. INTERMITTENT WIRING AND CONNECTORS The conditions necessary to set this DTC are not present at this time. Note: Check connectors — Clean/repair as necessary. Poor pin to terminal connections can set DTCs. Using Note: Check for any Technical Service Bulletins that may apply. Were there any problems found? Yes >> Repair as necessary. Perform POWERTRAIN VERIFICATION TEST - VER 2. No >> The condition that caused this DTC to set is currently not present. Inspect the related wiring harness for a possible intermittent condition. ZH ENGINE - ELECTRICAL DIAGNOSTICS 9 - 177 |