# Service bulletin RCL/557

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: 39014
- Published by NHTSA: 1995\-03\-01
- Manufacturer's number: RCL/557
- Manufacturer's date: 1994\-12\-01
- NHTSA component: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL

## NHTSA's summary

IT HAS BEEN DETERMINED THAT THE 1990 JEEP VEHICLE, EQUIPPED WITH THE 2.5L ENGINE, MAY BE IN VIOLATION OF FEDERAL EMISSIONS STANDARDS. HYDROCARBON, CARBON MONOXIDE AND OXIDES OF NITROGEN LEVELS COULD BE ABOVE ALLOWABLE LIMITS, WHICH WERE ESTABLISHED TO PROTECT THE PUBLIC HEALTH FROM THE DANGERS OF AIR POLLUTION. TO CORRECT THIS PROBLEM, DEALERS WILL REPLACE THE OXYGEN SENSOR. \*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

- 1990 JEEP CHEROKEE
- 1990 JEEP COMANCHE
- 1990 JEEP WRANGLER

## Recalls for the same vehicles and component

- [1995062](/recalls/tc/1995062.md), 1995-04-07: Emissions
- [1993071](/recalls/tc/1993071.md), 1993-05-21: Emissions
- [1991018](/recalls/tc/1991018.md), 1991-01-29: Engine
- [1990156](/recalls/tc/1990156.md), 1990-10-05: Emissions

## 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/558](/bulletins/41032.md), 1995-11-01, Service bulletin: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL. RECALL 558 \- FAILURE OF THE OXYGEN SENSOR AND CATALYTIC CONVERTER MAY CAUSE A VEHICLE TO BE IN VIOLATION OF CALIFORNIA EMISSIONS STANDARDS. TO CORRECT THIS CONDITION, THE OXYGEN SENSOR AND CATALYTIC CONVERTER MUST BE REPLACED WITH IMPROVED DESIGN PARTS. \*TW
- [RCL/589](/bulletins/37980.md), 1995-02-10, Service bulletin: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. HYDROCARBON AND CARBON MONOXIDE EMISSIONS LEVLS FOR THE ABOVE LISTED MODEL VEHICLES MAY EXCEED THE LIMITS ALLOWED BY CALIFORNIA EMISSIONS STANDARDS. TO CORRECT THE CONDITION, THE PCV HARNESS, CHOKE VACUUM DIAPHRAGM, EGR VALVE AND DECEL VALVE, IF EQUIPPED, MUST BE REPLACED. \*TW

JSON: [/v1/bulletins/39014](/v1/bulletins/39014)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%20RCL%2F557&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F39014&vehicle=Service%20bulletin%20RCL%2F557)