P1DB8 · Manufacturer communications

CHRYSLER, DODGE · 2017-08-25

Flash: Transmission Diagnostic and Shift Enhancements This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that one of the following Diagnostic Trouble Codes (DTCs) have been set: U1424-00 - Implausible Engine Torque Signal Received. P1DB8-00 - Unintended Torque Applied While in Neutral. Customers may describe the following: Poor shift quality on coast down shifts (bumps) (LX and LD Only). In addition, the following software enhancement is available: Improved transmission shifting during a limp mode.

CHRYSLER, DODGE · 2017-03-07

Flash: Transmission Diagnostic And Shift Enhancements This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest available software. A small number of customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following Diagnostic Trouble Codes (DTCs) set in the TCM memory: P1DB8-00 - Unintended Torque Applied While In Neutral. U1424-00 - Implausible Engine Torque Signal Received.In addition to the above DTCs, this software release also includes: Improved transmission shifting during a limp mode.

CHRYSLER, JEEP · 2014-09-30

Flash: MIL Illumination For P1DCF, P1DD0, P1DB8 This bulletin involves selectively erasing and reprogramming the Transmission Control Module (TCM) with new software. The following Transmission Control Module (TCM) calibration improvements are available for (KL) Jeep Cherokee. Both engines ((EHB) 3.2L V6 24V VVT and (ED6) 2.4L I4 Multi Air) ? P1DB8 Unintended Torque Applied while in Neutral (set due to erroneous DTC) ? P1DCF TCM Monitoring Processor Performance - Unallowed Park Engagement due to ABS Failure (set due to erroneous DTC). ? P1DD0 TCM Monitoring Processor Performance - Unallowed Park Engagement (set due to erroneous DTC). 2.4L KL (ED6) only ? Shift comfort complaint on 1-2 and 2-3 upshifts when lifting foot off throttle ? P1DCF TCM Monitoring Processor Performance - Unallowed…

CHRYSLER, JEEP · 2014-09-30

Flash: MIL Illumination For P1DCF, P1DD0, P1DB8 This bulletin involves selectively erasing and reprogramming the Transmission Control Module (TCM) with new software. The following Transmission Control Module (TCM) calibration improvements are available for (KL) Jeep Cherokee. Both engines ((EHB) 3.2L V6 24V VVT and (ED6) 2.4L I4 Multi Air) ? P1DB8 Unintended Torque Applied while in Neutral (set due to erroneous DTC) ? P1DCF TCM Monitoring Processor Performance - Unallowed Park Engagement due to ABS Failure (set due to erroneous DTC). ? P1DD0 TCM Monitoring Processor Performance - Unallowed Park Engagement (set due to erroneous DTC). 2.4L KL (ED6) only ? Shift comfort complaint on 1-2 and 2-3 upshifts when lifting foot off throttle ? P1DCF TCM Monitoring Processor Performance - Unallowed…

JEEP · 2014-09-05

Flash: MIL Illumination For P0733, P061B, P1DB8 This bulletin involves selectively erasing and reprogramming the Transmission Control Module (TCM) with new software. The following Transmission Control Module (TCM) calibration improvements are available. ? P0733 Gear 3 Shift Incorrect Ratio ? P061B Internal Control Module Torque Calculation Performance ? P1DB8 Due to erroneous DTC ? Improved downshift response in Adaptive Cruise Control (ACC) operation when there is a driver override.

JEEP · 2014-09-05

Flash: MIL Illumination For P0733, P061B, P1DB8 This bulletin involves selectively erasing and reprogramming the Transmission Control Module (TCM) with new software. The following Transmission Control Module (TCM) calibration improvements are available. ? P0733 Gear 3 Shift Incorrect Ratio ? P061B Internal Control Module Torque Calculation Performance ? P1DB8 Due to erroneous DTC ? Improved downshift response in Adaptive Cruise Control (ACC) operation when there is a driver override.