Seat Heater Control Circuit High
The seat heater control circuit has high voltage detected.
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What it means (plain English)
The seat heater system is detecting too much voltage in the circuit; this can cause overheating or failure of the seat heater.
What the computer is actually seeing
The body control module is monitoring the voltage on the seat heater control circuit and sees it above the expected threshold, indicating a potential short or fault in the wiring.
What a healthy reading looks like
The seat heater control circuit should operate between 0.5V to 2.5V when the seat heater is active, and close to 0V when off.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Check the seat heater wiring for obvious damage or wear. Ensure no wires are pinched or exposed.
- 22. Inspect the connectors at the seat heater module for corrosion or poor connection. Clean if necessary.
- 33. Use a multimeter to measure voltage at the seat heater connector. It should be between 0.5V and 2.5V with the heater on. If it’s over 2.5V, there’s a fault. If it's correct, the module may be bad.
- 44. Check resistance of the seat heater element. It should be within manufacturer specs, usually around 5 to 10 ohms. If it's shorted (almost 0 ohms), replace the seat element.
- 55. If you find issues in wiring or the element, repair or replace those. If everything is okay, replace the seat heater control module.
Common causes
- Shorted wiring in the seat heater circuit
- Faulty seat heater module
- Corroded connectors leading to increased resistance
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, you can drive the vehicle, but the seat heater may not function and could pose a risk of overheating if the circuit is faulty.
Will this code come back after clearing it?
If the underlying issue isn’t resolved, the code is likely to return after clearing it.
Why does this code come with other seat-related codes?
Multiple codes may indicate a common issue in the seat heater circuit or control module related systems.
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