Implausible Message Data Length Received From ESM
Table of contents
U1508 RAM Possible Causes
- Faulty Electronic Shift Module (ESM)
- Electronic Shift Module harness is open or shorted
- Electronic Shift Module circuit poor electrical connection
- Faulty Transmission Control Module (TCM)
How do I fix code U1508 RAM?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the U1508 RAM code
The cost of diagnosing the U1508 RAM code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
U1508 RAM Description
The messages sent on the Controller Area Network (CAN) bus are distinguished by an Identifier (ID). Each CAN ID is defined to contain a certain number of bytes. The Transmission Control Module (TCM) verifies that it has received the proper number of bytes for each ID. The Diagnostic Trouble Code (DTC) will set when the TCM detects an incorrect CAN ID from the Electronic Shift Module (ESM).
