# Service bulletin 1801601

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: 620921
- Published by NHTSA: 2001\-09\-04
- Manufacturer's number: 1801601
- Manufacturer's date: 2001\-07\-13
- NHTSA component: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM

## NHTSA's summary

SOME CUSTOMERS MAY EXPERIENCE AN EXHAUST BOOM\-LIKE SOUND IN THE PASSENGER COMPARTMENT WHEN THE ENGINE IS IDLING. \*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, Exhaust and emissions

## Vehicles listed

- 2000 to 2001 JEEP 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.
- [1803903](/bulletins/10005644.md), 2004-03-10, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE. ROUGH IDLE DUE TO HIGH AMBIENT OR HOT SOAK TEMPERATURES. THIS CONDITION MAY BE MOST NOTICEABLE WHEN THE ENGINE IS RESTARTED FOLLOWING A 10 TO 20 MINUTE HEAT SOAK IN HOT AMBIENT CONDITIONS OF APPROXIMATELY 32 DEGREES C OR HIGHER. \*TT
- [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
- [0900301](/bulletins/621942.md), 2001-10-05, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. THIS BULLETIN REINFORCES A REQUIREMENT TO CEASE THE CURRENT PRACTICE OF USING SUPPLEMENTAL OIL ADDITIVE TREATMENTS IN ALL DAIMLERCHRYSLER ENGINES. \*TT
- [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
- [1801301](/bulletins/620067.md), 2001-07-11, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. SOME VEHICLE ENGINES MAY EXHIBIT A ROUGH IDLE AND / OR MALFUNCTION INDICATOR LAMP \(MIL\) LIGHT ON CONDITION UPON INITIAL START\-UP AFTER A COLD SOAK WHEN TEMPERATURES ARE BELOW 50 DEGREES F \(10 DEGREES C\). THIS BULLETIN INVOLVES SELECTIVELY ERASING AND REPROGRAMMING THE POWERTRAIN CONTROL MODULE \(PCM\) WITH NEW SOFTWARE. \*TT
- [0900301](/bulletins/620063.md), 2001-07-11, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. THIS BULLETIN REINFORCES A REQUIREMENT TO CEASE THE CURRENT PRACTICE OF USING SUPPLEMENTAL OIL ADDITIVE TREATMENTS IN ALL DIAMLER CHRYSLER ENGINES. \*TT
- [8591/8592](/bulletins/610645.md), 2000-05-09, Service bulletin: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. SUBJECT REGARDING THE ON\-BOARD DIAGNOSTIC \(OBD\) SYSTEM ON ABOUT 309,000 VEHICLES LOCATED OUT OF CALIFORNIA AND VEHICLES LOCATED IN CALIFORNIA WILL NOT DETECT A CATALYST FAILURE AS REQUIRED BY FEDERAL AND CALIFORNIA REGULATIONS. \*TT
- [180100](/bulletins/609988.md), 2000-04-12, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE. SUBJECT REGARDING MISDIAGNOSED LEAK DETECTION PUMP SYSTEMS WITH DIAGNOSTIC TROUBLE CODES P1494, P0442 P0455, OR P0456. \*TT

JSON: [/v1/bulletins/620921](/v1/bulletins/620921)

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