# Service bulletin 011395

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 39012
- Published by NHTSA: 1995\-03\-01
- Manufacturer's number: 011395
- Manufacturer's date: 1994\-12\-01
- NHTSA component: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM

## NHTSA's summary

SUPPLEMENTAL INFORMATION TO MANUFACTURER'S RECALL \#556. \*TW

## The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

## Components

Engine, Exhaust and emissions

## Vehicles listed

- 1989 JEEP CHEROKEE
- 1989 JEEP COMANCHE
- 1989 JEEP WRANGLER

## Recalls for the same vehicles and component

- [1995062](/recalls/tc/1995062.md), 1995-04-07: Emissions
- [1994195](/recalls/tc/1994195.md), 1994-12-12: Emissions
- [1993071](/recalls/tc/1993071.md), 1993-05-21: Emissions
- [1991018](/recalls/tc/1991018.md), 1991-01-29: Engine

## Other bulletins for the same vehicles and component

- [070397](/bulletins/6088786.md), 2000-01-07, Service bulletin: ENGINE AND ENGINE COOLING. CONCERNS WITH ENGINE COOLANT USAGE. \*NLM
- [070397](/bulletins/52963.md), 1997-11-13, Service bulletin: ENGINE AND ENGINE COOLING:COOLING SYSTEM. VARIOUS CAR OWNER'S HAVE EXPRESSED INTEREST IN USING ENGINE COOLANTS MADE WITH PROPYLENE GLYCOL INSTEAD OF ETHYLENE GLYCOL. \*YC
- [RCL647](/bulletins/46153.md), 1996-04-25, Service bulletin: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE \(EGR VALVE\). APPLIES TO VEHICLES EQUIPPED WITH A 4.2L ENGINE AND FEDERAL HIGH ALTITUDE EMISSION CONTROL SYSTEM. FUEL VAPORS MAY CAUSE DETERIORATION OF THE PCV HARNESS ASSEMBLY. THE PCV HARNESS ASSEMBLY MUST BE REPLACED AND THE ENGINE IDLE SPEEDS MUST BE RESET.
- [RCL/617](/bulletins/43047.md), 1995-11-01, Service bulletin: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. UNKNOWN
- [RCL/556](/bulletins/39015.md), 1995-03-01, Service bulletin: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. IT HAS BEEN DETERMINED THAT CERTAIN EMISSION RELATED COMPONENTS OF THE 1989 JEEP EQUIPPED WITH THE 2.5L ENGINE, MAY BE SUSCEPTIBLE TO FAILURE. FAILURE OF THESE COMPONENTS MAY CAUSE THE VEHICLE TO BE IN VIOLATION OF CALIFORNIA EMISSIONS STANDARDS. HYDROCARBONS, CARBON MONOXIDE AND OXIDES OF NITROGEN COULD BE ABOVE THE ALLOWABLE LIMITS, WHICH WERE ESTABLISHED TO PROTECT PUBLIC HEALTH FROM THE DANGERS OF AIR POLLUTION. TO CORRECT THIS PROBLEM, DEALERS WILL REPLACE THE OXYGEN SENSOR, CRANKCASE VENTILATION HOSE AND IF EQUIPPED, THE TRANSFER CASE VACUUM HOSE AND FUEL TANK VENT BOOT. IN ADDITION, THE THE EXHAUST MANIFOLD WILL BE CHECKED FOR AN EXHAUST LEAK NOISE AND REPLACED AS RQUIRED. \*TW
- [RCL/616](/bulletins/39013.md), 1995-03-01, Service bulletin: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. IT HAS BEEN DETERMINED THAT THE OXYGEN SENSOR ON CERTAIN 1989 JEEP CHEROKEE, COMANCHE AND WRANGLER MODELS EQUIPPED WITH A 2.5L ENGINE MAY BE SUSCEPTIBLE TO FAILURE. FAILURE OF THE OXYGEN SENSOR MAY CAUSE YOUR VEHICLE TO BE IN VIOLATION OF FEDERAL EMISSIONS STANDARDS. TO CORRECT THIS PROBLEM, DEALERS WILL REPLACE THE OXYGEN SENSOR. \*TW

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