Skip the auto shop - Our mechanics make house calls

Q: Revs real high when I leave it idling

asked by on

My 2011 Toyota Tundra has a automatic transmission and only about 17,000 miles on the clock. When I leave it idling it will randomly increase revs about 700 rpm and then gradually bring that down over a couple of minutes. Not sure what to do and not sure if this can even hurt the truck. What is happening here?

A: Your engine control system is constantly ma...

Your engine control system is constantly making adjustments in relation to the various input signals it receives. Some idle changes are normal adjustments to a number of things that may be occurring. For example if left idling for a long period, things such as engine temperatures, A/C, defrost operations or exhaust temperature, can all trigger a response from the engine control system to adjust the idle speed. RPM speeds in the range you describe are not uncommon. If the speeds seem to be erratic or extreme, then have a qualified service mechanic, like one from YourMechanic, inspect your engine's high idling speed for any abnormalities. Keep in mind that it may result in finding no problem, unless there is a failed component.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Radiator replacement costs 1998 Toyota Camry

As you may already know or have experienced, labor and part quotes on your vehicle can vary quite a bit depending on where you go and the mechanic doing the estimate. The reason for this is that different mechanics have...

Q: I think I have every warning light on right now

Without my knowing what the dealer did or what they’ve explained to you, I can offer you this explanation, understand that every light requires positive (+) and negative (-) in order to light up. When the ignition is on, there...

Q: idles rough code sensors

Hello. It may be the new oxygen sensor not being completely compatible with the vehicle causing it to run worse. Have a technician ensure that the new oxygen sensor is wired correctly. Also, check the reviews for the oxygen sensor...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...