Skip the auto shop - Our mechanics make house calls

Q: Filled in regular instead of premium fuel, CEL came on, P0022 code

asked by on

The check engine light was illuminated on my dash. I'm not sure if it might have anything to do with it but the other day, the worker at a gas station accidentally filled the fuel tank with regular 87 instead of the premium 93 octane. I got the codes read, and the P0022 appeared. After driving a bit more after that, the check engine light went off. Do I have anything to worry about? Is there a correlation between the error code, the CEL and regular fuel? Thanks.

A: Hello there, the P0022 code is indicating t...

Hello there, the P0022 code is indicating that the car's computer has over-retarded the engine timing. This makes sense with the 87 octane gasoline used instead of the 93 octane gasoline. The car was most likely attempting to adjust to the lower octane gas and set the code. The code would go away once the computer was able to adjust to what octane gas is present. The best thing to do is to drive the car and fill it with the proper gas during your next trip to the gas station. If you notice that the light still remains well after your next fill of gas, then have the Check Engine Light diagnosed by a technician to see if any other issues are occurring.

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

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: truck is ticking.

Hello, thanks for writing in about your 2001 Grand Cherokee. It is possible that a cracked flywheel will make noise and also cause the crank position sensor to be given bad information. That may be the source of the Check...

Q: Fuel consumption is high

Hi and thanks for your question. In order to have a good fuel consumption, the fuel to air mixture must be around 14.7 to 1. This is the formula for the air to fuel ratio. Look at the carburetor for...

Q: Car temperature control only blows hot air

The A/C would need to be checked with gauges to see if it has refrigerant. If the temperature blend door actuator is broken, the A/C can be stuck in warm if that was the last position you had it in....

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...