# Service bulletin 181599

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: 606167
- Published by NHTSA: 1999\-08\-11
- Manufacturer's number: 181599
- Manufacturer's date: 1999\-06\-18
- NHTSA component: ENGINE AND ENGINE COOLING:ENGINE:GASOLINE

## NHTSA's summary

SEVERAL REVISIONS HAVE BEEN MADE TO THE IDLE STRATEGY OF THE 4.7L ENGINE. ONE CHANGE IS TO THE UPSTREAM OXYGEN SENSOR \(O2\) BIASING / SWITCHING WHEN THE TRANSMISSION IS IN PARK OR NEUTRAL. \*TT

## 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

## Vehicles listed

- 1999 JEEP GRAND CHEROKEE

## Recalls for the same vehicles and component

- [2002074](/recalls/tc/2002074.md), 2002-04-17: Engine

## Other bulletins for the same vehicles and component

- [R2118796A](/bulletins/10191460.md), 2021-05-03, Service bulletin: ENGINE AND ENGINE COOLING. Valve Body. These may cause over drive cycling.
- [1803103](/bulletins/10003986.md), 2003-11-11, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE. 4.0L ROUGH ENGINE IDLE AFTER RESTART FOLLOWING A HOT SOAK. \*TT
- [0900303](/bulletins/10003538.md), 2003-10-23, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE. 4.0L MULTIPLE CYLINDER MISFIRE. \*TT
- [1801202](/bulletins/630965.md), 2002-04-30, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. SUBJECT REGARDING COLD START RPM FLARE. \*JG
- [2500401](/bulletins/620071.md), 2001-07-11, Service bulletin: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. SUBJECT REGARDING ADDITIONAL DIAGNOSTIC FOR DIAGNOSTIC TROUBLE CODES CAUSED BY AN EVAPORATIVE SYSTEM LEAK. \*TT
- [1802300A](/bulletins/618403.md), 2001-04-12, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. SUBJECT PERTAINING TO ENGINE PERFORMANCE ENHANCEMENTS. \*JB
- [1800101](/bulletins/618401.md), 2001-04-12, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. INFORMATION REGARDING ENGINE PERFORMANCE ENHANCEMENTS. \*JB
- [1802300](/bulletins/616726.md), 2001-03-08, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. SOME VEHICLE ENGINES MAY EXHIBIT PART THROTTLE OR WIDE OPEN THROTTLE SPARK KNOCK; SAG OR HESITATION FOLLOWING A COLD ENGINE START; ROUGH IDLE; IDLE SAG WHEN DECELERATING TO A STOP. \*TT
- [090100A](/bulletins/6092301.md), 2000-12-04, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. CUSTOMER MAY COMPLAIN OF AN OIL EMULSION ACCUMULATION INSIDE THE ENGINE OIL FILL HOUSING. \*TT
- [140600A](/bulletins/6092299.md), 2000-12-04, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. CUSTOMERS MAY EXPERIENCE A LONGER THAN NORMAL ENGINE CRANKING TIME PRIOR TO ENGINE START. \*TT

JSON: [/v1/bulletins/606167](/v1/bulletins/606167)

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