Skip the auto shop - Our mechanics make house calls

Q: some times my 94 silverado accelerate and turn on service engine soon ligth, and turn off key a fey seconds run normaly. thanks fo

asked by on

some times my 94 silverado accelerate and turn on ( service engine soon) ligth, and turn off key a fey seconds run normaly. thanks for your help.

A: Hello. There are countless potential reason...

Hello. There are countless potential reasons for your Check Engine Light being on. Older GM vehicles such as yours, seem to have a habit of extinguishing the Check Engine Light as soon as the condition that triggered it is no longer present. Cycling the key is probably resetting this process. The first step in diagnosing this problem is to retrieve the stored diagnostic trouble codes. These codes serve as a starting point for any further troubleshooting. I recommend having a professional, such as one from YourMechanic, diagnose the Check Engine Light and repair this problem for you

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Can't pass smog check with Check Engine Light on

The most common reason for your Check Engine Light coming on is for random engine misfires. You may be having this problem, and may need to have the ignition diagnosed, to see what is causing the misfire. You may have...

Q: Car does not start

Hi There, This may be related to many different possibilities, some of which may be related to a lack of spark and some of which may be related to a fuel delivery problem or a combination of both. Things like...

Q: Transmission doesn't work when it's cold

Sounds like its almost time for a transmission rebuild. An automatic transmission has rubber seals inside similar to o-rings. These seals get hard over time and no longer do their job. Letting the car heat up also heats up the...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...