GM Vehicle Error Code P1112: How to Fix It

Q: What causes GM error code P1112?

P1112 is typically caused by a faulty IAT sensor, damaged wiring, corroded connectors, or intermittent electrical connections. Sometimes a dirty or contaminated sensor can also trigger this code.

Q: Can I drive with P1112 error code?

Yes, you can typically drive with P1112 as it's a low-severity code. However, you may experience reduced fuel economy, rough idle, or poor performance. It's best to fix it promptly to maintain optimal engine operation.

Q: How much does it cost to fix P1112?

DIY repair costs range from $20-80 for a replacement IAT sensor or connector. Professional repair typically costs $150-300 including diagnosis, parts, and labor, depending on the specific issue and vehicle model.

Q: Will P1112 cause my GM vehicle to fail emissions?

Yes, P1112 can cause your vehicle to fail an emissions test since it affects the engine management system. The code needs to be resolved and the system must complete its readiness monitors before passing emissions testing.

Q: How do I prevent P1112 from coming back?

Keep your air filter clean, protect wiring from heat and moisture damage, and address any engine bay corrosion promptly. Regular maintenance and keeping electrical connections clean helps prevent intermittent sensor issues.

Abstract

GM error code P1112 indicates an intermittent low voltage signal from your Intake Air Temperature (IAT) sensor. This sensor measures incoming air temperature to help your engine's computer optimize fuel delivery and ignition timing for better performance and emissions.