U1401 Chrysler Code - Implausible Engine Speed Signal 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 Powertrain Control Module (PCM) 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
- U1401 Chrysler indicates Implausible Engine Speed Signal Received.
- Common causes
- Common causes include Check for Powertrain Control Module (PCM) 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 U1401 Chrysler Description
What are the Possible Causes of the DTC U1401 Chrysler?
- Check for Powertrain Control Module (PCM) 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 U1401 Chrysler?
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 U1401 Chrysler 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 U1401 Chrysler Code
1. What are the common symptoms of OBDII code U1401 in a Chrysler vehicle?
The common symptoms of U1401 include the Check Engine Light (CEL) coming on, erratic engine performance, stalling, and issues with starting the vehicle.
2. What does the OBDII code U1401 "Implausible Engine Speed Signal Received" mean in a Chrysler?
U1401 indicates that the Engine Control Module (ECM) has detected an implausible engine speed signal, which could be caused by a communication error between modules or a fault in the engine speed sensor.
3. What are the possible causes of OBDII code U1401 in a Chrysler?
Possible causes of U1401 include a faulty engine speed sensor, wiring issues, a defective ECM, a communication error between modules, or a software glitch in the vehicle's system.
4. How can I diagnose OBDII code U1401 in my Chrysler?
Diagnosing U1401 typically involves using a diagnostic scanner to retrieve the code, checking the engine speed sensor and related wiring for faults, and performing a communication system test to identify any module communication issues.
5. Can I continue driving my Chrysler with OBDII code U1401 active?
It is not recommended to drive your vehicle with an active U1401 code, as it can lead to further engine performance issues, stalling, and potential safety risks. It's best to address the problem promptly.
6. How can I repair OBDII code U1401 in my Chrysler?
Repairing U1401 may involve replacing the engine speed sensor, repairing any damaged wiring, reprogramming or replacing the ECM, addressing communication system faults, or updating software to resolve the issue.
7. Is it possible to reset OBDII code U1401 in a Chrysler without repairing the underlying issue?
While you can clear the code temporarily, it will likely reappear if the root cause of the problem is not addressed. It's essential to diagnose and repair the issue to prevent ongoing issues.
8. Are there any DIY tips for troubleshooting OBDII code U1401 in a Chrysler?
DIY tips for troubleshooting U1401 include checking for loose or damaged wiring, ensuring all connections are secure, and performing a visual inspection of the engine speed sensor for any obvious issues.
9. How long does it usually take to repair OBDII code U1401 in a Chrysler?
The repair time for U1401 can vary depending on the specific cause of the issue. Simple fixes like sensor replacement may take an hour or two, while more complex issues involving module communication may require more time.
10. Can a mechanic help me fix OBDII code U1401 in my Chrysler, or do I need to visit a dealership?
A qualified mechanic should be able to diagnose and repair U1401 in your Chrysler. However, if the issue requires specialized tools, software updates, or ECM replacement, a dealership may be better equipped to handle the repair.
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