U3019
Control Module Input Power Circuit B/C Correlation
U3019 is an OBD-II diagnostic trouble code meaning: Control Module Input Power Circuit B/C Correlation. Common causes: poor contact in ecu connectors, corroded or damaged wires. Estimated repair cost: $17–111.
Symptoms
- Unstable engine operation
- Periodic failures in the operation of electronic systems
- Malfunction indicator light comes on
- Problems starting the engine
Causes
- Poor contact in ECU connectors
- Corroded or damaged wires
- Control unit malfunction
- Alternator or battery problems
How to Fix
- Check connections and connectors of the ECU
- Inspect the wiring harness for damage
- Check voltage in power supply circuits B and C
- Test the generator and battery
- If necessary, replace the ECU
Related codes
Error U3019 by Vehicle Brand
FAQ
What does the U3019 code mean?
U3019 is an OBD-II diagnostic trouble code that indicates: Control Module Input Power Circuit B/C Correlation
What causes a U3019 error code?
The most common causes of U3019 include: Poor contact in ECU connectors; Corroded or damaged wires; Control unit malfunction; Alternator or battery problems.
How do I fix a U3019 diagnostic trouble code?
To fix U3019: Check connections and connectors of the ECU. Inspect the wiring harness for damage. Check voltage in power supply circuits B and C. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U3019?
Limited driving only, diagnose soon
How much does it cost to fix U3019?
The estimated repair cost for U3019 is $17–111. Actual cost depends on your vehicle, location, and labor rates.
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