P0113 Intake Air Temperature Sensor 1 Circuit High Bank 1
Intake air temperature sensor 1 is the first air temperature sensor in the intake path; depending on the vehicle it is built into the mass air flow sensor, mounted near the air filter or, on some naturally aspirated GM engines, fitted in the intake manifold. Most versions are NTC thermistors in a 5 V divider: the hotter the air, the lower the signal voltage. P0113 means the signal is above its valid range. With an NTC sensor that is typically an open circuit – connector off, broken wire, open sensor or missing ground – or a short to a voltage source, and the module would read an extremely cold value (GM about −60 °C). Documented limits: Ford petrol above 4.96 V for 5 s, Ford diesel above 4.91 V, GM above about 127 kilohms. A classic cause is a sensor left unplugged after an air filter change; one manufacturer bulletin describes broken wires at the connector caused by harness tension. Monitoring is continuous, GM needs two trips.
Likely causes
Symptoms
- Check engine light on
- Usually hardly noticeable
- Slightly richer mixture and higher consumption possible
- Torque limitation on some systems
Repair estimate
Typical range across vehicles; the real cost depends on what the testing finds.
What to check first
- Check the connector is seated
- Check for an open circuit
- Replace sensor if out of range
Parts involved
Related codes
References: law.cornell.edu, newtonnet.co.uk, gsi.ext.gm.com, static.nhtsa.gov.