U1204
IMA-CAN Malfunction
U1204 is an OBD-II diagnostic trouble code meaning: IMA-CAN Malfunction. Common causes: broken or damaged can bus wires, poor contact in connectors. Estimated repair cost: $6–56.
Symptoms
- Check Engine light comes on
- The car goes into emergency mode
- Malfunctions of various systems
- Gear shifting problems
- Reduced engine power
Causes
- Broken or damaged CAN bus wires
- Poor contact in connectors
- Malfunction of one of the electronic modules
- Short circuit in the circuit
- Problems with module power supply
How to Fix
- Check the integrity of the CAN bus wiring
- Inspect all connectors for oxidation or damage.
- Check power supply and ground of connected modules
- Scan all modules for errors
- Replace damaged wires or connectors
Related codes
FAQ
What does the U1204 code mean?
U1204 is an OBD-II diagnostic trouble code that indicates: IMA-CAN Malfunction
What causes a U1204 error code?
The most common causes of U1204 include: Broken or damaged CAN bus wires; Poor contact in connectors; Malfunction of one of the electronic modules; Short circuit in the circuit.
How do I fix a U1204 diagnostic trouble code?
To fix U1204: Check the integrity of the CAN bus wiring. Inspect all connectors for oxidation or damage.. Check power supply and ground of connected modules. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U1204?
Do not drive — repair immediately
How much does it cost to fix U1204?
The estimated repair cost for U1204 is $6–56. Actual cost depends on your vehicle, location, and labor rates.
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