Preliminary Checks
WARNING: This page is about a different car, the 2003 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
- See DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS under SELF-DIAGNOSTIC SYSTEM in SELF-DIAGNOSTICS - 1.8L VIBE article.
- Compare the customers vehicle with a similar unit in order to determine if the customer has an actual problem.
- Remove the air filter element and check for dirt or restrictions.
- Check the air inlet duct for any blockage or restrictions.
- Check the transmission shift pattern and down-shift operation.