Q: Q: Engine light won't go off

asked by on

I've replaced a coil pack, both O2 sensors, both solenoids to canister, spark plugs, wires, gas cap, air filter & a faulty throttle connector on top of the engine. Have disconnected battery & manually cleared w/ scanner. I drive less than 50 miles and light comes back on! Have done this three times. What else do I need to look at? How many times does the memory store the codes?

My car has 159399 miles.
My car has an automatic transmission.

Some of the items you have replaced are maintenance items, so that is good. Your car utilizes OBD-II which is a diagnostic system that outputs "diagnostic trouble codes" if a malfunction is detected and, at the same, alerts the operator that these codes have been stored by illuminating the Check Engine Light (CEL). If the CEL is still on, the best thing to do is download the remaining codes and see what they point toward. Usually, a code will be accompanied by a basic statement of the "fault", but all of the devices, sensors, components, wiring, grounds, and even stuff not directly related (or mentioned) in the code, will have to be individually tested to accurately find the problem. So, at this stage, what I would recommend is have a certified Mechanic perform a check engine light diagnostic. The Mechanic will have to look at the many possibilities that arise from the code(s) that are downloaded but at the end of that effort you will finally get an identification of the root issue that is still setting the CEL. Once you have that root issue, the Mechanic will be in a position to explain the repair strategy and what, if any, parts will be required to fix your car.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Q: Engine light won't go off

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Clutch not working after replacing slave cylinder and master cylinder

Hello. We will be happy to help you with your vehicle. It sounds like you have a problem with your throw out bearing. You would likely need to drop the transmission once again and check that the installation of the...

Q: Door loose

I will assume that the door is hanging, and does not line-up properly when closed. There are a few situations that can cause the door to hang loose: The hinges holding the door on may have started to fatigue, or...

Q: just replaced front and back calipers power booster bled all brake lines and when you put the brake on and coming to a slow stop i

I think you need to take a look at the brake pads to make sure they did not get put in backwards. If you are getting grinding noise and the ABS is kicking in then you may have put one...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...