RepairPal is your advocate for car care advice and guidance

Q: Check Engine light comes on but no OBDII code is set on 2006 GMC Canyon

I have used an OBDII code reader when the Check Engine light illuminates, but the reader shows no codes. I reset the light, but it comes back within a minute of re-starting the engine. When engine is cold, it "bogs down" upon acceleration, then picks up and operates fine. No noticeable change in gas mileage. This has happened several time in the past month.
Get a Repair Estimate
Guaranteed by certified locations nationwide. Learn more
RepairPal estimates are guaranteed at over 1,700 quality certified locations nationwide. Learn more
have a scanner that can read 'live' data hooked up and check sensor values before and after start-up. make sure voltage level is correct. Many vehicles computers will set 'false codes' if there is a voltage error.
Didn't find what you were looking for?