Turn off your car and put the key fob in the ignition.
Check engine light on prius.
The video above shows how to locate the on board diagnostics obd plug on your 2010 prius how to read the trouble codes and how to reset or clear the check engine light using a scanner on your prius.
When my 2009 toyota prius reached approximately 65 000 miles the check engine light came on and the error code was p1121 indicating a problem with the coolant control valve.
Now i knew from the internet that the most common cause of this is a loose gas cap.
Drove to the dealer.
A check engine light can indicate a broad spectrum of problems with your 2010 toyota prius.
Hold down your car brake and press the power button to turn the car on.
It may signal a minor or major complication however ignoring it certainly makes the problem worse resulting in expensive damage and repair.
So my prius check engine light came on the other day.
You may avoid all of the hassles if you understand the motives of this light coming.
Started the car again this morning.
The light was still on.
Toyota prius check engine light reset.
December 26 2017 by jonhughes.
I started the car again.
The check engine light may need a few days to a week of normal driving before turning off.
Cold start drive until normal operating temp park at least 5 hours repeat two more times.
For most evap codes that means at least 3 warm up cycles.
Light was still on.
I took the car to my local toyota dealership and their charge for replacing the part was 400.
The mechanic who inspected the valve said it was not closing securely.
The on board diagnostic has to run and pass three consecutive times to turn off the light.
So i promptly unscrewed my gas cap and re screwed it in.
Toyota prius check engine light reset finds a problem over the powertrain.