A/C Temperature Sensor Circuit Range/Performance Problem
The A/C temperature sensor is out of its expected range.
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 temperature sensor is either too high or too low, which means the air conditioning can't work right.
What the computer is actually seeing
The sensor is supposed to read a resistance between 2,000 to 5,000 ohms at 25°C (77°F). If it reads under 1,000 ohms or over 10,000 ohms, it triggers this code.
What a healthy reading looks like
At 25°C (77°F), expect around 3,000 ohms from the A/C temperature sensor.
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 A/C temperature sensor connector for damage or corrosion. If found, repair or replace as necessary. Decision: Is the connector good? Yes: go to Step 2; No: Repair connector.
- 22. Measure the resistance at the A/C temperature sensor. Expect it to be around 3,000 ohms. Decision: Is the resistance normal? Yes: go to Step 3; No: Replace the A/C temperature sensor.
- 33. Check the wiring between the sensor and the control module for continuity and shorts to ground. Use a multimeter. Decision: Is wiring good? Yes: go to Step 4; No: Repair wiring.
- 44. Clear the code and run the vehicle with the A/C on. If code returns, replace the A/C control module.
Common causes
- Wiring issues in the A/C sensor circuit
- Faulty A/C temperature sensor
- Short to ground or open circuit in wiring
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, you can drive the vehicle, but A/C performance will be affected.
Will this code come back after clearing?
It may return if the underlying issue isn't fixed.
Why does this code relate to other codes?
Codes like B1470 and B1473 are related because they deal with similar sensors and performance issues.
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