U1440 Dodge Code - Implausible/Missing Programmed Transfer Case Hi Ratio
Quick Answer
This programmed Transfer Case Hi Ratio information is received from the Totally Integrated Power Module (TIPM) to be used by the Transmission Control Module (TCM) as part of speed sensor diagnostics. Common causes include Faulty Transmission Control Module (TCM), Transmission Control Module (TCM) harness is open or shorted, Transmission Control Module (TCM) circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- U1440 Dodge indicates Implausible/Missing Programmed Transfer Case Hi Ratio.
- Common causes
- Common causes include Faulty Transmission Control Module (TCM), Transmission Control Module (TCM) harness is open or shorted, Transmission Control Module (TCM) circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code U1440 Dodge Description
What are the Possible Causes of the DTC U1440 Dodge?
- Faulty Transmission Control Module (TCM)
- Transmission Control Module (TCM) harness is open or shorted
- Transmission Control Module (TCM) circuit poor electrical connection
- Faulty Totally Integrated Power Module (TIPM)
How to Fix the DTC U1440 Dodge?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the U1440 Dodge code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about U1440 Dodge Code
1. What does the OBDII code U1440 mean on a Dodge vehicle?
U1440 indicates "Implausible/Missing Programmed Transfer Case Hi Ratio," meaning the transfer case high-range ratio data is invalid or absent in the vehicle’s communication system.
2. What are the common symptoms of the U1440 code?
Symptoms may include the Check Engine Light or Service 4WD Light illuminating, difficulties shifting between transfer case modes, or the 4WD system not functioning properly.
3. What causes the U1440 code to appear on a Dodge?
Common causes include a malfunctioning transfer case control module (TCCM), faulty wiring or connections, corrupted programming, or incorrect transfer case ratio data.
4. Can a faulty sensor cause the U1440 code?
Yes, a faulty transfer case position sensor or encoder motor sensor can send incorrect data, triggering the U1440 code.
5. How do you diagnose the U1440 code on a Dodge?
Diagnose by using a scan tool to check for related codes, inspecting the wiring and connectors to the transfer case control module, and verifying the programmed transfer case data is correct.
6. Can the U1440 code be fixed with a software update?
In some cases, reprogramming or updating the transfer case control module software can resolve the issue if the fault is due to corrupted or missing data.
7. Can I drive with the U1440 code active?
Driving may be possible, but it’s not recommended since the 4WD system might not function correctly, potentially affecting vehicle handling off-road or in slippery conditions.
8. How much does it cost to fix the U1440 code?
Repair costs vary depending on the issue, ranging from $100–$300 for wiring repairs to $500–$1,000 for module replacement and programming.
9. Will clearing the code fix the problem?
Simply clearing the code without addressing the underlying issue will not fix the problem, and the code is likely to return.
10. Can a worn-out transfer case cause the U1440 code?
Yes, internal damage or wear in the transfer case can lead to incorrect ratio readings, potentially triggering this code.
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