B1853: Climate Control Air Temperature Internal Sensor Motor Circuit Failure
HighBodyClimate Control
What does B1853 mean?
B1853 is a diagnostic trouble code indicating "Climate Control Air Temperature Internal Sensor Motor Circuit Failure". A sensor in the climate control is reporting abnormal data or has lost communication with the ECU. Sensors can fail due to age, contamination, heat exposure, or wiring issues.
Symptoms you may notice
- Check engine light (MIL) illuminated on dashboard
- Engine overheating
- Temperature gauge reading high
- Heater not working properly
- Intermittent warning lights
Estimated repair cost
Typical range in Australia (parts + labour)
$100 – $500 AUD
Common causes
- Faulty climate control component
- Wiring or connector issue in the related circuit
- Failed sensor providing incorrect readings
- Software/calibration issue requiring ECU update
- Related component causing secondary fault
What should you do?
This is a significant issue that should be diagnosed and repaired soon. Avoid long trips or heavy driving until the problem is resolved. Continued driving may cause additional damage.
Get a diagnosis for YOUR car
Code B1853 can mean different things depending on your vehicle. TorqueBot gives you a diagnosis specific to your make, model, and year.