DTC B1854 Dodge
Input Shaft (Mainshaft) Speed Sensor Intermittent Failure
Input Shaft (Mainshaft) Speed Sensor Intermittent Failure
Description
If no pulses occur with the input shaft (mainshaft) rotating, the PCM detects a malfunction that may be caused by an open, a temporary open, or a short to ground. The fluctuation of the vehicle speed measured by the input shaft (mainshaft) speed sensor in 10 milliseconds is 4 mph (6km h) or more, and it fluctuates at least six times within 500 milliseconds. NOTE: This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.
Cause and Solution
Poor connections or loose terminals at the input shaft (mainshaft) speed sensor and the PCM Open or Short in the wire between PCM connector terminal and the input shaft (mainshaft) speed sensor connector Open in the wires between PCM connector terminals and ground Faulty input shaft (mainshaft) speed sensor PCM needs to be updated with the latest software Faulty PCM
Video Guide
Diagnostic Info
- DTC Code: B1854
- Brand: Dodge