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P0157-O2 SENSOR 2/2 CIRCUIT LOW (CONTINUED) 7. (K243) O2 2/2 SIGNAL CIRCUIT SHORTED TO THE (Z992) O2 2/2 HEATER GROUND CIRCUIT Measure the resistance between the (K243) O2 2/2 Signal circuit and Is the resistance below 100 ohms? Yes >> Repair the short between the (Z992) O2 2/2 Heater ground circuit and the (K243) O2 2/2 Signal circuit. Perform POWERTRAIN VERIFICATION TEST. (Refer to 9 No >> Go To 8 8. PCM NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal Were there any problems found? Yes >> Repair as necessary. Perform POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) No >> Replace and program the Powertrain Control Module per Service Information. Perform POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) 9 - 190 ENGINE ELECTRICAL DIAGNOSTICS ND |