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.
Low severity. Can I keep driving?It is not urgent: you can keep driving, although the mixture will be slightly richer and fuel consumption may rise. First check whether the connector was left loose, especially after cleaning or replacing the filter.
Bank 1 is the side of the engine with cylinder 1. Inline engines only have this bank.
Symptoms
- Check engine light on
- Usually hardly noticeable
- Slightly richer mixture and higher consumption possible
- Torque limitation on some systems
Most likely causes
- Connector unplugged or loose, or wire broken
- Sensor open internally
- Sensor return (ground) wire open
- Signal wire shorted to a voltage source
- Engine control module faulty
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- Repair difficulty: easy
- It can trigger limp mode.
- It affects emissions.
What each character of P0113 means
- P: Powertrain: engine and transmission
- 0: Generic code: same on every make
- 1: Air and fuel
- 13: Specific fault in that system
Frequently asked questions
Can I keep driving with code P0113?
It is not urgent: you can keep driving, although the mixture will be slightly richer and fuel consumption may rise. First check whether the connector was left loose, especially after cleaning or replacing the filter.
What causes code P0113?
The most common causes are: connector unplugged or loose, or wire broken; sensor open internally; sensor return (ground) wire open.
Related codes
- P0110Intake Air Temperature Sensor 1 Circuit Bank 1
- P0111Intake Air Temperature Sensor 1 Circuit Range/Performance Bank 1
- P0112Intake Air Temperature Sensor 1 Circuit Low Bank 1
- P0114Intake Air Temperature Sensor 1 Circuit Intermittent/Erratic Bank 1
- P0098Intake Air Temperature Sensor 2 Circuit High Bank 1
Sources
- law.cornell.edu: 13 CCR 1968.2
- newtonnet.co.uk: fordobd2012
- gsi.ext.gm.com: 18OBDG04 Engine Diagnostics
- static.nhtsa.gov: MC 10120527 9999
Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.