OBD-II Generic Error Code P0099: How to Fix It

Q: Can I drive with code P0099?

Yes, but you may experience reduced engine performance and fuel economy. It's best to fix the issue promptly to avoid potential engine damage.

Q: What are the symptoms of a bad IAT sensor 2?

Symptoms include poor acceleration, rough idling, engine hesitation, black smoke from exhaust, and increased fuel consumption.

Q: Where is IAT sensor 2 located?

IAT sensor 2 is usually located in the intake air duct after the intercooler or in the intake manifold. Consult your vehicle's service manual for exact location.

Q: How much does it cost to replace an IAT sensor?

The sensor itself costs between $20 and $100. Labor costs vary but typically range from $50 to $150.

Q: Can a dirty air filter cause P0099?

A dirty air filter can cause incorrect IAT readings but is more likely to affect sensor 1. However, replacing the filter is cheap maintenance and should be done anyway.

Abstract

Error code P0099 indicates that the Engine Control Module (ECM) has detected an intermittent signal from the Intake Air Temperature (IAT) sensor 2, which is typically located in the intake air duct or intake manifold after the intercooler. This can cause poor engine performance, reduced fuel economy, or hesitation.