DTC B1978 Dodge
Transmission Input Speed Shaft Sensor
Transmission Input Speed Shaft Sensor
Description
Engine started, vehicle driven at cruise speed for 3-5 minutes, and the TCM detected too large a change in the gear speed ratio from the Input Speed sensor signal during the CCM Rationality test.
Cause and Solution
Input speed sensor signal circuit is open or shorted to groundInput speed sensor is damaged or has failedTCM has failedTSB 1-40-005 (3 01) contains information about this code
Video Guide
Diagnostic Info
- DTC Code: B1978
- Brand: Dodge