B1030 — Ambient Air Temperature Sensor Fault
What it means: Ambient Air Temperature Sensor Fault.
How serious / can you keep driving: Informational. Usually OK to continue — monitor closely.
Check first: Check AAT sensor location and resistance
Don't risk it — look up listed providers near you and give them this code when you call.
Listed providers nearest Sparks, NV
Closest first. Tell them B1030 and what the truck is doing. RoadService.app lists these providers and does not employ them or carry out the repair.
- 0.0 mi away — based in Sparks, NV · (775) 355-6884
- 0.0 mi away — based in Sparks, NV · (775) 356-7200
- 0.0 mi away — based in Sparks, NV · (775) 359-0550
Seen on: Heavy Truck
What B1030 means
Ambient Air Temperature Sensor Fault. Common causes: AAT sensor failure.
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
Ambient Air Temperature Sensor Fault. Common causes: AAT sensor failure.
Informational — Usually OK to continue — monitor closely.
The most common cause is: AAT sensor failure. Other possibilities include Failed sensor; heat soaked location.
Usually OK to continue — monitor closely. When in doubt, get a qualified mobile diesel tech on the truck before continuing.
Related codes
Codes that commonly appear alongside B1030, or share the same subsystem.
- Blower Motor Circuit Open (B1004)
- Blower Motor Circuit Short to Ground (B1005)
- APU HVAC Communication Fault (B1050)
- Coolant/Diesel Heater Circuit Fault (B1052)
- HVAC Control Module Voltage High (B1001)
- HVAC Control Module Voltage Low (B1002)
- A/C Pressure Sensor Circuit Fault (B1010)
- Air Distribution Actuator Fault (B1040)
Find a mechanic or related guides
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.