The Vehicle Does Not Shift Between 4H And 4L Modes Correctly
Table of contents
C1729 FORD Possible Causes
- Transmission neutral switch
- Brake ON/OFF (BOO) switch
- ABS wheel speed inputs
- CAN communication network
- Transfer case
- 4×4 module (PCM)
How do I fix code C1729 FORD?
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 C1729 FORD code
The cost of diagnosing the C1729 FORD 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
- Anti-Lock Brake System (ABS) Warning Light ON
- Engine Light ON (or Service Engine Soon Warning Light)
C1729 FORD Description
The high-low shift occurs when the reduction shift fork moves the high-low collar to lock the planetary gear set to the output shaft. The torque transmitted through the sun gear from the input shaft turns the front planetary gear set assembly. The front planetary gear set assembly, now engaged, provides transfer case speed reduction. Certain criteria, such as vehicle speed, transmission range selection and brake applied must be met before this shift can occur. Systematically check the necessary inputs and outputs of the 4×4 module (PCM), components of the transfer case, IWE components and half shafts.