Skip the auto shop - Our mechanics make house calls

Q: car will not pass e-check.

asked by on

Hello, 'my name is Jarek and I've recently purchased an 08 cobalt. Had work done to it and runs great. Took it to e check and 3 times now they say the computer will not run tests on my car because it's still running diagnostics.. it's been a month now of driving it around. I have even borrowed a friends scanner and read the I/M monitors there's 4 problems. The HTD catalyst, Sec air system, A/C refrig monitor, and EGR System are all n/a. I've tried 3 different drive cycles over and over but they don't help reset. I just don't know what to do anymore. Please help.

My car has 148100 miles.
My car has a manual transmission.

A: You are looking at the wrong monitors. The ...

You are looking at the wrong monitors. The one’s that are NA, your car doesn’t have and you should pay no attention to them. What you should look for is complete, and incomplete. You are allowed to have one test incomplete and the car will still pass. The tests take certain driving criteria to run, each one it’s own criteria. Here’s what I would do. Disconnect your battery overnight. Cars computers have weird glitches sometimes. In the morning, start the car and let it run for 10 minutes before you drive it. When you drive it, concentrate on using steady throttle. The drive should include a long acceleration, a long deceleration, and at least 5 minutes of steady 45 mph +. When you are done with your drive, let the car idle for 10 minutes. Re-check your monitors and repeat if necessary, letting the engine cool down before starting again. If the Check Engine Light comes on, it will need to be repaired. Also, the fuel tank should be 1/4 to 3/4 full. If you need help, consider YourMechanic.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: P0306 code misfire

Hello there, many common faults will cause a cylinder 6 misfire in your 2001 Chevrolet Impala. The most common faults are the spark plugs, plug wires, fuel injectors, vacuum leak, fuel pump, or low cylinder compression. A qualified Technician such...

Q: Cooling system performance issue with my car.

The code that is set in your car's computer indicated that there is a cooling system problem. Based on my service information it is indicating that there is a high likelihood that either your coolant thermostat or [coolant temperature sensor...

Q: Repair costs and worth? Resell?

Spark plugs on your vehicle should be replaced every 30,000 miles, if they are of the non-platinum type and every 60,000 miles if they are platinum plugs. To obtain service on the spark plugs, please request spark plug replacement. Oxygen...

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...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...