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P0161-O2 SENSOR 2/2 HEATER PERFORMANCE (CONTINUED) 4. (Z992) O2 2/2 HEATER GROUND CIRCUIT OPEN Measure the resistance between ground and the (Z992) O2 2/2 Heater Is the resistance below 0.5 of an ohm? Yes >> Go To 5 No >> Repair the excessive resistance in the (Z992) O2 2/2 Heater ground circuit. Perform POWERTRAIN VERIFICATION TEST. (Refer to 9 5. 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 - 202 ENGINE ELECTRICAL DIAGNOSTICS ND |