U049D
Invalid Data Received From Glow Plug Control Module 2
A receiving module detected implausible data from glow plug control module 2. Plug current/voltage or temperature values fail plausibility checks and are rejected; cold-start strategy reverts to fail-safe.
A receiving module detected implausible data from glow plug control module 2. Plug current/voltage or temperature values fail plausibility checks and are rejected; cold-start strategy reverts to fail-safe.
Common causes
- high
Module internal fault or sensor input drift
One of the most commonly reported causes for this code — check this first.
Typical part cost: $130-1320
- medium
Software version mismatch after replacement
A plausible cause — test and verify before replacing parts.
Typical part cost: $130-1320
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First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
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Related codes
See related trouble codes
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Frequently asked questions
What does U049D mean?
U049D means "Invalid Data Received From Glow Plug Control Module 2". It is a generic OBD-II code that points to a fault in the network / communication.
What are the most common causes of U049D?
module internal fault or sensor input drift; software version mismatch after replacement; gateway module routing can messages incorrectly — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.
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