Skip the auto shop - Our mechanics make house calls

Q: Warning light still on

asked by on

I fixed my alternator, and I was checking voltage in the trunk near the battery. I unhooked a wire from battery to a distribution box by accident, and the car shut off. It was a 2ga wire. I put it back on, started the car and had a warning light on the dash saying that I had an engine malfunction and reduced power. I unhooked the battery for 20 minutes and the warning light was still on. Do you know what the problem is?

I am not sure that there is actually a problem. The warning indicator that was produced by the vehicle was likely in reaction to the wire being unplugged from the power distribution box. When a trouble code is stored it will usually take multiple drive cycles or an OBD2 scanner to reset the light. I would recommend having the warning reset with an OBD2 scan tool and this should resolve your issue. If you are noticing any drivability issues, a certified technician from YourMechanic can diagnose your Warning Light and help pinpoint the fault.

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
  1. Home
  2. Questions
  3. Warning light still on

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: Hi, Could use a lot of help. I have a 2006 Audi A4, recently purchased. Just recently the PRNDS lights are flashing, had it tested

Hello, thank you for writing in. The vehicle is likely having an issue with the TCM, or transmission control module. The issues you are having are classic of a TCM failure, and the issues will get worse. Unfortunately, there are...

Q: Good day, my car central lock key is not working and my car doesn't want to start. What can cause this?

Hello and thank you for contacting YourMechanic. When the voltage on your vehicle is lower than 10.45, then the computer will lock out the ignition system. If the battery voltage is low, but higher than 10.45, then the key could...

Q: TIMING CHAIN BREAKS IN A 740IL WILL IT BEAN A VAILS

Hi Curtiss. Thanks for submitting your question. I'm not quite certain what to advise, but generally speaking, when a timing chain breaks, it typically causes significant internal engine damage. Although these issues can be fixed, it is typically more cost-effective...

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...