Technical Service Bulletin 1808423 — 2018 JEEP GRAND CHEROKEE
POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)
Bulletin Details
| TSB ID | 1808423 |
| Manufacturer | |
| Vehicle | 2018 JEEP GRAND CHEROKEE |
| Component | POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM) |
| Communication Date |
Bulletin Summary
Flash: Powertrain Control Module (PCM) Updates Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs) have been set: ? P0420 - Catalyst System Efficiency Below Threshold Bank 1. ? P0430 - Catalyst System Efficiency Below Threshold Bank 2. ? P0606 - Internal Control Processor. Customer may also experience the following: ? While the engine is running, customer may experience a vehicle limp in/home mode (speed limitation, engine throttle limitation and the ETC light flashing and MIL will be on) or the vehicle may experience a no-start condition. NOTE: Associated with DTC: P0606 - Internal Control Processor. This bulletin involves reprogramming the PCM with the latest available software.
About Technical Service Bulletins
A Technical Service Bulletin (TSB) is a document issued by a vehicle manufacturer to its dealers, describing a known issue with a specific vehicle or set of vehicles and the recommended procedure to fix it. Unlike recalls, TSBs are not mandatory and are typically only performed if an owner reports the related issue. However, TSBs can be an indicator of common problems with a vehicle.
Other TSBs for the 2018 JEEP GRAND CHEROKEE
18-001-26
POWER TRAIN
21-009-26
POWER TRAIN
08-396-25
ELECTRICAL SYSTEM
9100498
ENGINE
9100448
SEATS
93023
EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
1807623
ELECTRICAL SYSTEM
1807623
POWER TRAIN
1807623
POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)
0809223
ELECTRICAL SYSTEM:SOFTWARE