JEEP

18-007-26 REV B

2026-04-17 · NHTSA 11031449

A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.

Manufacturer summary

Original wording in English

Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● **P0301 - Cylinder 1 Misfire (Active or Stored status set during cold start catalyst heating). ● P0302 - Cylinder 2 Misfire (Active or Stored status set during cold start catalyst heating). ● P0303 - Cylinder 3 Misfire (Active or Stored status set during cold start catalyst heating). ● P0304 - Cylinder 4 Misfire (Active or Stored status set during cold start catalyst heating). ● P0305-00 - Cylinder 5 Misfire (Active or Stored status set during cold start catalyst heating). ● P0306-00 - Cylinder 6 Misfire (Active or Stored status set during cold start catalyst heating).** ● P0300 - Multiple Cylinder Misfire. ● P0032 - O2-Sensor 1/1 Heater Circuit High. ● P0038-02 - O2-Sensor 1/2 Heater Circuit High. ● P0052-02 - O2-Sensor 2/1 Heater Circuit High. ● P0058-02 - O2-Sensor 2/2 Heater Circuit High. ● P0132-02 - O2 Sensor 1/1 Circuit High. ● P0138-02 - O2 Sensor 1/2 Circuit High. ● P0152-02 - O2 Sensor 2/1 Circuit High. ● P0158-02 - O2 Sensor 2/2 Circuit High. ● P2100 - Electronic Throttle Control Motor Circuit. ● P2107 - Electronic Throttle Control Module Processor. ● P0129 - Barometric Pressure Out Of Range Low. China Market Only ● P08A6 - Gear Lever Position Sensor System - Multiple Sensor Correlation. (Manual Transmission Only). ● P152F - Engine Hood Switch 2 / Engine Hood Switch 1 Correlation. ● P1129 - Closed Loop Fueling Not Achieved - Bank 2 Upstream. Customers may also comment on one or more of the following: ● **The vehicle has a rough idle. ● The engine has a miss. ● Noisy valvetrain.** J18 FSAR-TSB-7200 -2- ● "Service Transmission" message in the Instrument Panel Cluster (IPC) due to clutch slip detection with the transfer case in neutral (Manual Transmission Only). NOTE: Customers might experience wheel spin or slippage and the PCM could

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