U1477 RAM Code - Implausible Paddle Shifter Data Received
Quick Answer
The purpose of the diagnostic is to monitor the Controller Area Network (CAN) BUS, the transmitted messages on the CAN BUS and the validity of the CAN signals. Common causes include Check for Steering Control Module (SCM) codes, Faulty Transmission Control Module (TCM), Transmission Control Module harness is open or shorted. 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
- U1477 RAM indicates Implausible Paddle Shifter Data Received.
- Common causes
- Common causes include Check for Steering Control Module (SCM) codes, Faulty Transmission Control Module (TCM), Transmission Control Module harness is open or shorted.
- 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 U1477 RAM Description
What are the Possible Causes of the DTC U1477 RAM?
- Check for Steering Control Module (SCM) codes
- Faulty Transmission Control Module (TCM)
- Transmission Control Module harness is open or shorted
- Transmission Control Module circuit poor electrical connection
How to Fix the DTC U1477 RAM?
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 U1477 RAM 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 U1477 RAM Code
1. What does the OBDII code U1477 indicate?
The code U1477 suggests that the vehicle’s control module has received implausible data from the paddle shifter circuit, indicating a possible fault or malfunction in the paddle shifting system.
2. What are common symptoms of code U1477?
Symptoms may include erratic shifting, inability to use paddle shifters, the transmission stuck in a particular gear, or the check engine light may come on.
3. What can cause the U1477 code to appear?
Causes of code U1477 can include faulty paddle shifters, damaged wiring or connectors in the paddle shifter circuit, issues with the transmission control module, or software needing an update.
4. How is the U1477 code diagnosed?
Diagnosis involves using a scan tool to read the fault code and examining the paddle shifter assembly and associated wiring for signs of damage or malfunction. Further diagnostic procedures may include checking the transmission control module and potentially updating the vehicle’s software.
5. What are the repair steps for fixing code U1477?
Repairing this fault might involve replacing damaged paddle shifters, repairing or replacing faulty wiring, reprogramming or replacing the transmission control module, or updating the vehicle’s software.
6. Can I drive my vehicle with code U1477 appearing?
While you might be able to drive the vehicle, it is not advisable as it can lead to further issues with the transmission system. It is best to address the problem promptly to avoid potential safety issues or more costly repairs later.
7. Is it necessary to use OEM parts for repairing the paddle shifters related to code U1477?
Using OEM parts is generally recommended to ensure compatibility and reliability, especially with components like paddle shifters that interact closely with the vehicle’s transmission and electronic systems.
8. How urgent is it to fix a U1477 code?
It is relatively urgent to address this code, as it involves the transmission control system, which is crucial for vehicle safety and performance. Delaying repairs can lead to more severe transmission issues.
9. Will code U1477 clear on its own if the issue is resolved?
Once the underlying issue is fixed, the code should be cleared using an OBDII scan tool. In some cases, the vehicle’s ECU may automatically reset the code after several successful driving cycles without detecting further anomalies.
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