U1503 Code - Implausible Message Data Length Received From FCM
Quick Answer
The Diagnostic Trouble Code (DTC) will set when the Anti-Lock Brake Module detects an incorrect Controller Area Network (CAN) message from the Totally Integrated Power Module (TIPM). Common causes include Faulty Totally Integrated Power Module (TIPM), Totally Integrated Power Module harness is open or shorted, Totally Integrated Power Module 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
- U1503 indicates Implausible Message Data Length Received From FCM.
- Common causes
- Common causes include Faulty Totally Integrated Power Module (TIPM), Totally Integrated Power Module harness is open or shorted, Totally Integrated Power Module 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 U1503 Description
What are the Possible Causes of the DTC U1503?
- Faulty Totally Integrated Power Module (TIPM)
- Totally Integrated Power Module harness is open or shorted
- Totally Integrated Power Module circuit poor electrical connection
- Faulty Anti-Lock Brakes (ABS) Module
How to Fix the DTC U1503?
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 U1503 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.
Need more information about the U1503 code?
Need more information on how to fix the U1503 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the U1503 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- U1503 Chrysler — Implausible Message Data Length Received From FCM
- U1503 Dodge — Implausible Message Data Length Received From FCM
- U1503 Jeep — Implausible Message Data Length Received From FCM
- U1503 RAM — Implausible Message Data Length Received From FCM
Frequently Asked Questions about U1503 Code
1. What are the common symptoms of OBDII code U1503?
- Common symptoms include the Check Engine Light illuminating, rough engine performance, and potential issues with the vehicle's transmission.
2. What does the OBDII code U1503 mean?
- OBDII code U1503 indicates an "Implausible Message Data Length Received From FCM" error, suggesting a communication problem between modules in the vehicle.
3. What are the possible causes of OBDII code U1503?
- Possible causes include a faulty Front Control Module (FCM), wiring issues, damaged connectors, software malfunctions, or problems with the Controller Area Network (CAN) bus.
4. How can I diagnose the OBDII code U1503?
- Diagnosing U1503 typically involves using a diagnostic scan tool to retrieve the code, checking for other related codes, inspecting wiring and connectors, and testing the communication between modules.
5. Can I still drive my vehicle with the U1503 code present?
- It is generally not recommended to drive the vehicle with the U1503 code present, as it may lead to further damage or safety risks. It's best to address the issue promptly.
6. How can I repair OBDII code U1503?
- Repairing U1503 involves addressing the root cause, which may include replacing a faulty FCM, repairing wiring/connectors, updating software, or fixing CAN bus communication issues.
7. Are there any DIY tips for fixing OBDII code U1503?
- While some basic troubleshooting like checking connectors and fuses can be done by DIY enthusiasts, resolving U1503 often requires specialized equipment and expertise, making professional repair advisable.
8. How much does it cost to fix the U1503 code?
- The cost of fixing U1503 can vary widely depending on the specific cause of the issue, parts needed for repair, and labor costs. It's recommended to get a diagnostic assessment from a qualified mechanic for an accurate estimate.
9. Can a U1503 code be intermittent?
- Yes, the U1503 code can sometimes be intermittent, meaning the issue may come and go. It's essential to address intermittent codes promptly to prevent potential long-term problems.
10. Is it necessary to reset the computer after fixing U1503?
- Yes, it is recommended to clear the code and reset the vehicle's computer system after fixing the U1503 code to ensure the issue has been properly resolved and to turn off the Check Engine Light.
Discuss the causes and fixes for U1503 OBDII Code
Code U1503 comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
