Q: Check Engine Light stays on.

asked by on October 18, 2016

The check engine light comes on and stays on. Have reset and came back on. Replaced gas cap with OEM, reset and check engine light came back on. What else could it be and how much would it cost?

My car has 85000 miles.
My car has an automatic transmission.

Gas Cap Replacement $87.91 - $243.49 Get a Quote
Check Engine Light is on Inspection $79.99 - $99.99 Get a Quote

Hi there You should have the computer Check Engine Light scanned by a mechanic. Once the codes are received and the pinpoint test is completed, you should have a diagnosis of the failed component. A lot of times a code for a leak in the evaporative system is assumed to be a bad or there is a loose gas cap (which you have already replaced). A complete check may find leaking purge valves or other components. I recommend having a professional, like one from YourMechanic, diagnose the Check Engine Light in person so that this can be properly resolved.

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・Fair and transparent pricing

What others are asking

Should I replace my spare tire?

You should have a tire store or dealer inspect the spare tire for damage and excessive wear and the need to replace it. If you drove over the 50 mile limit and over speeds limited by tire then without seeing...

How much does it cost to teplace fuel injector in 2003 ford ranger, is it something i could do myself

Hi...the Trouble Code that sets if a fuel injector malfunctions does not provide a diagnostic identifying the cause of the injector failure. Consequently, the injector itself has to be directly tested. You could, for example, have a situation where the...

Running lights won't turn off - 1990 Mazda B2200

It is possible that the electrical relay for the running lights, or the light switch itself, is stuck closed, or has burned contacts. A professional mechanic with good electrical diagnostic training, like YourMechanic, can diagnose this possible electrical issue and...

Gas leaking for middle of car

Leaking gas is a serious concern and definitely needs to be addressed as soon as possible. Due to leaking gas being a big safety issue, I first have to recommend enlisting the assistance of a certified mechanic to look over...

Key won't turn in ignition

If moving the steering wheel while turning the key does not work, then try your extra key. If this does not work, then the ignition key cylinder will need replaced. I recommend having a mechanic, like one from YourMechanic, inspect...

Side of my car is touching the ground

Nissan just issued a recall NHTSA Campaign #15V573000 dated 9/17/2015 that the dealer will replace the two front coil springs. You should have or will receive the recall from Nissan. You should contact your dealer and schedule the repairs as...

Problem with emission control code P0440 Check Engine Light. Is that a major problem and how do you fix?

Hi there, A P0440 code is stored for an emission related fault; evaporative emission control malfunction. The evaporative emission system is responsible for preventing the release of fuel vapor into the atmosphere. When there is a fault in the...

How does air get trapped in coolant system

It is the normal operation of the coolant in your cooling system to expand when it gets hot. The purpose of the overflow tank is simply that. The radiator cap is designed to allow coolant to pass into the overflow...

Can p0717 trigger p0700 on 2006 Equinox?

Both the codes P0700 and P0717 are to the transmission input shaft speed sensor and most likely are related codes. You should have transmission input speed sensor replaced and codes cleared and then see if any codes or problems return....

Related articles

B1472 OBD-II Trouble Code: Lamp Headlamp Input Circuit Short to Ground
B1472 means that the smart junction box detects that the headlamp switch has been turned to the on position, often due to failed wiring or switches.
P2038 OBD-II Trouble Code: Reductant Inj Air Press Sensor Circ Range/Performance
The The P2038 code is a general OBD-II diagnostic trouble code that points to a fault with the reductant injection air pressure sensor “A” circuit range / performance. What the P2038 code means The reductant injection system adds air or...
P0590 OBD-II Trouble Code: Cruise Control Multi-Function Input “B” Circuit Stuck
P0590 means an electrical issue with the cruise control multi-function input B circuit, commonly caused by a malfunctioning cruise control switch.