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Service bulletin 18-110-20

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10187704
Published by NHTSA2021-03-01
Manufacturer's number18-110-20
Manufacturer's date2020-12-11
NHTSA componentENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM; STEERING; POWER TRAIN

NHTSA's summary

Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the Powertrain Control Module (PCM) with thelatest available software. The customer may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more ofthe following Diagnostic Trouble Codes (DTCs): U1504 - Implausible Message Data Length Received From Steering Angle Sensor. P1185 - General Pressure Sensor Correlation. U1424-00 - Implausible Engine Torque Signal Received. P0101 - Mass Air Flow Sensor "A" Circuit Performance. P0128 - Thermostat Rationality. P0300 - Multiple Cylinder Misfire. P0301 - Cylinder 1 Misfire. P0302 - Cylinder 2 Misfire. P0303 - Cylinder 3 Misfire. P0304 - Cylinder 4 Misfire. Some customers may also experience the following condition: Extended engine crank times or possibly a no start condition(South Korea only). During an engine limp mode condition, the transmission remains in a fixedgear.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system, Engine, Steering, Transmission and driveline

Trouble codes named

P0101, P0128, P0300, P0301, P0302, P0303, P0304, P1185, U1424, U1504

Vehicles listed
JEEP CHEROKEE2017

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
20250122025-01-16. Powertrain
25V0110002025-01-16. POWER TRAIN
20232542023-04-27. Powertrain
23V3020002023-04-27. POWER TRAIN:AUTOMATIC TRANSMISSION
20202612020-06-12. Powertrain
20V3430002020-06-11. POWER TRAIN:DRIVELINE:DIFFERENTIAL UNIT; POWER TRAIN:AUTOMATIC TRANSMISSION
20182692018-05-17. Engine
18V3320002018-05-17. ELECTRICAL SYSTEM:SOFTWARE; VEHICLE SPEED CONTROL:CRUISE CONTROL; ELECTRICAL SYSTEM:WIRING

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
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03-002-262026-07-18. Service bulletin. Stop/Start Illuminated, 0x22 During Fork Wear Routine Technicians may experience the following: SYMPTOM: ● Negative response 0X22 after Recall 01C flash triggers one or more communication codes with controllers.
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S2523000003 REV.A2026-04-29. Service bulletin. Door Latch, Handle And Ajar Additional Service Information.
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