U049D
Invalid Data Received From Glow Plug Control Module 2
U049D is an OBD-II diagnostic trouble code meaning: Invalid Data Received From Glow Plug Control Module 2. Common causes: malfunction of glow plug control module 2, open or short circuit in the communication circuit. Estimated repair cost: $39–167.
Symptoms
- Difficulty starting the engine (especially in cold weather)
- Check Engine Light on Dashboard
- Reduced engine power
- Floating idle speed
- The engine may not start at all
Causes
- Malfunction of glow plug control module 2
- Open or short circuit in the communication circuit
- Poor contact in module connectors
- Problems with the module software
- Wiring harness fault
How to Fix
- Check the connections and connectors of the glow plug control module
- Test the communication circuit for open and short circuit
- Read error codes from glow plug module
- If necessary, replace glow plug control module 2
- Update module software (if available)
Related codes
Error U049D by Vehicle Brand
FAQ
What does the U049D code mean?
U049D is an OBD-II diagnostic trouble code that indicates: Invalid Data Received From Glow Plug Control Module 2
What causes a U049D error code?
The most common causes of U049D include: Malfunction of glow plug control module 2; Open or short circuit in the communication circuit; Poor contact in module connectors; Problems with the module software.
How do I fix a U049D diagnostic trouble code?
To fix U049D: Check the connections and connectors of the glow plug control module. Test the communication circuit for open and short circuit. Read error codes from glow plug module. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U049D?
Yes, but get it checked soon
How much does it cost to fix U049D?
The estimated repair cost for U049D is $39–167. Actual cost depends on your vehicle, location, and labor rates.
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