Q: Fuel injector problems

asked by on November 30, 2016

Well my check engine light came on so i went to the auto store to use a code reader and it gave me a p2020 code and i want to know how hard it is to fix the problem

My car has 79000 miles.
My car has an automatic transmission.

Check Engine Light is on Inspection $94.99 - $114.99 Get a Quote

Hello. Thanks for writing in. The diagnostic code that is triggering your warning light it’s a fairly generic code relating to a bad reading at one of the sensors. This bad reading can mean that there’s an electrical or mechanical fault with that system. The throttle body can be sticking or faulty. It may just need to be cleaned, which is relatively easy. The IRMC valve/solenoid can also stick or be faulty. Both of these are responsible for the amount of air that the PCM allows into the engine. And it is this air supply that has tripped the sensor or the sensor itself that has failed. Inspection of these systems can be done methodically, which is a tedious process in which you need a voltmeter. You can also clean both units and see if it was simple build up that caused bad readings. Start by cleaning the throttle and related sensors, and take diagnostics from there.

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

How should pregnant women wear seat belts?
Wearing a seat belt is a practice that everyone in the vehicle should follow. It is even a law in most states. The seat belt should fit snugly across the lap and shoulder, even on pregnant women. Pregnant women should...
How do I replace the washer fluid?
Occasionally you will need to replace your washer fluid. To check the status of your washer fluid, raise the hood, and locate the washer fluid reservoir. Look at the reservoir to see how full it is. If it is nearly...
Hard to press brake
Hello. This is caused by a bad brake vacuum booster (https://www.yourmechanic.com/services/brake-booster-vacuum-pump-replacement). When the booster fails, the brakes will get hard and it can cause a vacuum to leak in the engine causing a misfire. It sounds like this is what...
Leaking clear but oily fluid when AC is running. It is located through the front end under the hood (by the aluminum cover insulation in front)
Hello. From what you describe, it would appear that your vehicle may possibly have a refrigerant leak in the AC system. I would carefully inspect the area where the fluid is coming from to see if you can figure out...
Lower Control Arm bushing
After viewing the pictures you supplied and viewing many different manufacturers of the lower control arms I do not thing the bushing is installed all the way in your control arm. I recommend you go online and print one or...
RPM's fluctuate while idling and sometimes it dies. Getting codes for multiple misfires and knock sensor.
Hi there. Check the fuel injectors and see if they are working or not. While the engine is running, unplug one injector harness at a time. If the engine begins to hesitate, then the injector was working. If the engine...
need to find certified shop i have proof
I would recommend contacting your local Honda dealership. If any place would be certified to do such a thing, the dealership would likely be one of them. As for the drum brakes, the drums will be measured with a digital...
front left making a rumble. doesnt do it when slightly turning left
It is likely that the left front wheel bearing has failed. When you swerve to the left on a ramp, what you doing is transferring some of the weight of the car from the left to the right. The transference...
Why does My car shakes or roughly vibrates only in idle & reverse ?
This may be a sign of a faulty MAP sensor as the vehicle responds adversely to a load put on the motor (i.e. putting it in gear, making turns (which makes use of the power steering pressure switch) turning on...

Related articles

A Buyer’s Guide to the 2012 Chevrolet Impala
A A true classic, the 2012 Chevrolet Impala may not have all of the latest high-tech features of other sedans on the market, but it is a tried-and-true model with lots of room, plenty of comfortable features, and a large...
The Best Used Cars to Buy If You're an Undercover Cop
If If you're an undercover cop, when you choose a used vehicle, your main purpose is to look like anything but a cop. That means, of course, that an unmarked Crown Victoria is probably not the wisest choice. We’ve evaluated...
The Best Used Cars to Buy for Senior Citizens
Everyone Everyone needs a way to get around. You need to get groceries, get to doctors’ appointments, visit with family and more. However, senior citizens have very different needs when it comes to buying a used car than other demographics....