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P0131-O2 SENSOR 1/1 CIRCUIT LOW (CONTINUED) 5. (K41) O2 SENSOR 1/1 SIGNAL CIRCUIT SHORTED TO GROUND Turn the ignition off. Disconnect the C1 and C2 PCM harness connectors. Measure the resistance between ground and the (K41) O2 Sensor 1/1 Is the resistance below 100 ohms? Yes >> Repair the short to ground in the (K41) O2 Sensor 1/1 Sig- nal circuit. Perform POWERTRAIN VERIFICATION TEST. (Refer to 9 No >> Go To 6 6. (K41) O2 SENSOR 1/1 SIGNAL CIRCUIT SHORTED TO THE (K902) O2 RETURN UPSTREAM CIRCUIT Measure the resistance between the (K41) O2 Sensor 1/1 Signal cir- Is the resistance below 100 ohms? Yes >> Repair the short between the (K902) O2 Return Upstream circuit and the (K41) O2 Sensor 1/1 Signal circuit. Perform POWERTRAIN VERIFICATION TEST. (Refer to 9 No >> Go To 7 9 - 138 ENGINE ELECTRICAL DIAGNOSTICS ND |