H83 - Check Exhaust System For Leaks

NOTE: Any exhaust leaks between the engine and the end of the Catalyst may cause DTC 0136, 0156.

- Key Off.

- Place vehicle on a hoist, transmission in park, emergency brake applied, raise vehicle.

- Inspect the following.
- Exhaust flanges for leaks.
- HO2S torque.
- Check for punctures and cracks in Catalyst and pipes leading to them.

- Are there any exhaust leaks?

YES -- REPLACE or REPAIR as required. COMPLETE PCM reset to clear DTCs. COMPLETE a HO2S Monitor Drive Cycle. Monitors, Trips, Drive Cycles and Readiness Codes

NO -- Go to H84. H84 - Check HO2S Circuit Continuity