U1440
Implausible/Missing Programmed Transfer Case Hi Ratio
U1440 is an OBD-II diagnostic trouble code meaning: Implausible/Missing Programmed Transfer Case Hi Ratio. Common causes: transfer case sensor malfunction, open or short circuit in the sensor circuit. Estimated repair cost: $33–167.
Symptoms
- Check Engine Light Is On
- Problems with gear shifting in the transfer case
- The car can remain in one operating mode of the transfer case
- Reduced performance in 4WD mode
- Errors in the all-wheel drive system
Causes
- Transfer case sensor malfunction
- Open or short circuit in the sensor circuit
- Problems with the transfer case control module
- Mechanical damage to the transfer case
- Software error in control module
How to Fix
- Check the condition of the transfer case sensors
- Diagnose the transmission sensor circuit
- Check the transfer case control module for errors
- If necessary, replace faulty sensors or wiring
- Update control module software
Related codes
FAQ
What does the U1440 code mean?
U1440 is an OBD-II diagnostic trouble code that indicates: Implausible/Missing Programmed Transfer Case Hi Ratio
What causes a U1440 error code?
The most common causes of U1440 include: Transfer case sensor malfunction; Open or short circuit in the sensor circuit; Problems with the transfer case control module; Mechanical damage to the transfer case.
How do I fix a U1440 diagnostic trouble code?
To fix U1440: Check the condition of the transfer case sensors. Diagnose the transmission sensor circuit. Check the transfer case control module for errors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U1440?
Limited driving only, diagnose soon
How much does it cost to fix U1440?
The estimated repair cost for U1440 is $33–167. Actual cost depends on your vehicle, location, and labor rates.
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