Air Conditioning System Relay Failure
The vehicle's A/C relay is not working properly.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The A/C relay controls power to the air conditioning system. If it fails, the A/C won't work because it can't turn on the compressor or the blower.
What the computer is actually seeing
The computer detects a malfunction in the relay circuit for the air conditioning system, which could be due to open circuits, shorts, or internal relay failure.
What a healthy reading looks like
Relay voltage should be between 12V to 14V when energized; resistance across relay terminals should be under 5 ohms 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.
- 1Check A/C fuse for continuity; replace if blown and retest.
- 2Inspect the A/C relay and its wiring for damage; repair or replace as needed.
- 3Measure voltage at the relay terminals with the A/C request enabled; should see battery voltage (12-14V).
- 4Test relay function by swapping with a known good relay; if the A/C works, replace the faulty relay.
- 5If the relay is good, continue testing the A/C control module and associated wiring.
Common causes
- Faulty A/C relay
- Wiring issues (broken or shorted wires)
- Poor connections at the relay or control module
- Faulty A/C control module
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, but the A/C won't work until fixed.
Will this code come back after repairs?
If all faulty components are replaced and wiring is repaired, the code should not return.
Why does this code appear with other codes?
Multiple codes can indicate a larger issue in the A/C system or related components.
Working a real vehicle right now?
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