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B1030 — Ambient Air Temperature Sensor Fault
InformationalHVACUsually OK to continue — monitor closely
Seen on: Heavy Truck
Ambient Air Temperature Sensor Fault. Common causes: AAT sensor failure.
Don't risk it — get a diesel tech on the truck.
Look up listed providers near you and give them this code when you call.
How serious is it?
Informational. Usually OK to continue — monitor closely.
Most likely causes
- AAT sensor failure
- Failed sensor
- heat soaked location
First moves (roadside)
- Check AAT sensor location and resistance
- replace if incorrect reading
FAQ
What does B1030 mean?
Ambient Air Temperature Sensor Fault. Common causes: AAT sensor failure.
How serious is B1030?
Informational — Usually OK to continue — monitor closely.
What's the most likely cause of B1030?
The most common cause is: AAT sensor failure. Other possibilities include Failed sensor; heat soaked location.
Can I keep driving with B1030?
Usually OK to continue — monitor closely. When in doubt, get a qualified mobile diesel tech on the truck before continuing.
Throwing this code right now?
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General diagnostic guidance for diesel engines (Cummins, Detroit, PACCAR, Volvo, Mack and more). Not a substitute for a scan-tool diagnosis on your specific truck.