Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp...

Bulletin number

18-003-26

Component

Electrical system

Summary

Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P08A6 - Gear Lever Position Sensor System - Multiple Sensor Correlation. (Manual Transmission Only) ● P0032 - O2 - Sensor 1/1 Heater Circuit High. ● P0038 - O2 - Sensor 1/2 Heater Circuit High. ● P0052 - O2 - Sensor 2/1 Heater Circuit High. ● P0058 - O2 - Sensor 2/2 Heater Circuit High. ● P1129 - Closed Loop Fueling Not Achieved-Banks 2 Upstream. ● P0152 - O2 Sensor 2/1 Circuit High. ● P0158 - O2 Sensor 2/2 Circuit High. ● P2504 - Charging System Output High. ● P0563 - System Voltage High. Customers may also comment on the following: ● "Service Transmission” message on in the Instrument Panel Cluster (IPC) due to clutch slip detection (Manual Transmission Only). NOTE: Customers might experience wheel spin or slippage and the PCM could interpreted the wheel spin or slippage as slipping the clutch too much and to avoid clutch damage, the customer may see the message in the IPC. ● During flat tow - Transfer case mis-shift (engine running and clutch pedal up, transmission in gear) (Manual Transmission Only) . ● Vehicle runs rough. Other software enhancements include: ● Improvements to address vehicle no starts after replacing the PCM. ● O2 heater crack improvements. ● OBD software changes. statement. Revisions not highlighted by asterisks include removal of a Sale Code. M18 FSAR-TSB-6879 -2- This Technical Service Bulletin (TSB) has also been released as a Rapid Service Update (RSU) 24-109, date of issue August 01, 2024. All applicable RSU VINs have been loaded. To verify this RSU service action is applicable to the vehicle, use VIP or perform a VIN search in DealerCONNECT/Service Library. All repairs are reimbursable within the provisions of warranty. REPAIR SUMMARY: This bulletin involves inspecting and possibly reprogramming the PCM with th

Owners of these vehicles have filed 427 complaints in the electrical category.