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(P0131) O2 SENSOR 1/1 CIRCUIT LOW (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: The high limit: O2 Sensor voltage is greater than 1.5 volts for approximately 5 seconds. The low POSSIBLE CAUSES O2 SENSOR SIGNAL CIRCUIT OPEN O2 SENSOR SIGNAL CIRCUIT SHORT TO GROUND O2 SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE 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. PRE-DIAGNOSTIC CHECK OUT Note: Always perform diagnostics with a fully charged battery. Note: Check connectors — Clean/repair as necessary. Poor pin to Note: Check for applicable TSBs related to the problem. With the DRB III T , read PCM DTCs. Using the wiring diagram/schematic as a guide, inspect the wiring and Perform this procedure prior to symptom diagnosis. Continue Go To 2 ZH ENGINE - ELECTRICAL DIAGNOSTICS 9 - 125 |