Skip the auto shop - Our mechanics make house calls

Q: Check Engine Light comes on after starting pickup

asked by on

On a recurring basis, the check engine light comes on when I start my pickup and it stays on for around 30 seconds. When I give the engine some gas, the check engine light goes out. When I release the throttle for about another 30 seconds, then the check engine light comes back on. I drove about 10 minutes and then stopped and let the truck idle before turning it off. After several minutes, the check engine light did not come on. There is no sputtering and no strange noises when I give the engine more gas. In addition, this is an OBD1 code and the auto parts store will not read it. What can you tell me about this problem and how to fix it?

A: Hello there, thank you for asking about you...

Hello there, thank you for asking about your 1992 Isuzu Pickup. A professional will have the correct equipment to read OBD1 codes. Retrieving the diagnostic trouble code(s) is the first place to start when diagnosing your vehicle. Increasing RPMs changes engine load, which can in turn affect many different sensors and components, causing the Check Engine Light to illuminate. The only way to narrow down the options and find the culprit is through in person diagnosis with an OEM compatible scan tool. A certified technician from YourMechanic can retrieve the OBD codes at your home or office.

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: Driving and accelerating cause loud squealing in front of car.

The noise you are hearing is the engine serpentine belt. The belt is turned by the crankshaft pulley and the belt will then turn the other accessories like the tensioner,v-power steering, water pump, air conditioner compressor and idler pulleys. The...

Q: Fuel pump Check Engine Light issue with operational fuel pump

Code 47 (OBD-1) is the only code that pertains to "fuel pump related faults" in your car, so presumably that is the code that is recurring. If it is not Code 47, but rather a different code, that you are...

Q: low gas mileage

Decreases in fuel economy are caused by things like fuel control issues (fuel injector leaks, bad O2 or other sensors), transmission problems (won't shift into high gear, slipping, torque convertor clutch fails to lock-up), misfires (ignition related), low tire pressure,...

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...
How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
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...