Toyota Avalon Rough Idle

Learn if it's a simple fix or time to seek out a trusted technician.

What are common reasons my Toyota Avalon has a rough idle?

While there are a variety of reasons your Toyota Avalon has a rough idle, the most common 3 are a vacuum leak, an issue with the spark plugs, or a problem with the ignition coil.
of the time it's
Vacuum Leak
of the time it's
Spark Plugs
of the time it's
Ignition Coil

Get your Toyota issue diagnosed by a professional

Find a high quality auto repair shop or dealer near you

Related Toyota Avalon Questions

See what others are asking about their Toyota Avalon. Get answers from RepairPal's community of auto experts and enthusiasts.
Today i went to start my avalon and it wouldn't turn over on it's own. when i gave it some gas upon starting, it star...
Have added carburetor/injector cleaner to tank. took car to mechanic when idling roughly but when mechanic started i...

Related Toyota Avalon Problems

Find the most common driver-reported problems that are to blame when a Toyota Avalon has a rough idle.
The toyota avalon with the 3.0l v6 engine has a known issue with the valves that if left unchecked, will cause burned...
A rough idle and even an emissions inspection failure for high hc and co can be caused by improperly adjusted valves....
Toyota Avalon Repairs and Prices
All costs based on RepairPal Fair Price Estimate™ averages. Actual prices may change depending on final diagnosis.

Toyota Avalon Rough Idle Repair Symptoms

A failing ignition coil can create several symptoms: Check engine light comes on Engine runs poorly or stall Increased emissions Reduced fuel economy Car won’t start I...Read More
When spark plugs fail, the engine will struggle. The check engine light will come on, and it may appear either solid or flashing. The driver would likely notice one or more of t...Read More