Skip the auto shop - Our mechanics make house calls

Q: I got a alternator replaced on my car and now the Check Engine Light is on with the Battery Light. My headlights are still blinking.

asked by on

Could my throttle body wiring make my coolant drop to 0 on dash and not move after i had a alternator put on then this happens and battery light also lit up on dash i got brand new alternator and battery.

My car has 132000 miles.
My car has an automatic transmission.

Hi and thanks for contacting YourMechanic. This sounds like there is a loose ground or a wire was not hooked up to the alternator correctly. Check all of the wiring when that was removed when the alternator and battery was replaced. Back track all of the connections and make sure that they are all tight and clean. Check all the grounds to the vehicle in those circuits and makes sure that they are tight and clean. The throttle body wiring will not effect the cooling system to register 0 on the dash unless the coolant temperature sensor was unplugged or failed. If you need further assistance with your vehicle, then seek out a professional, such as one from YourMechanic, to help you with your Check Engine Light issue.

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!
  • Home
  • Questions
  • I got a alternator replaced on my car and now the Check Engine Light is on with the Battery Light. My headlights are still blinking.

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: High-end vs. low-end headlights

Of course, you'll want to do a price comparison of the bulb you're going to buy. If you go to the cheapest, discount auto parts stores, and buy the cheapest bulb, they will burn out faster. Those ones that were...

Q: No Power at All

You may have a bad negative cable to body attachment bolt that needs to be replaced under the battery tray. Technical service bulletin L-SB-0093-11 covers the replacement of the bolt and re-tapping the threads. The cable will not tighten and...

Q: Loud roaring sound from engine when accelerating

It sounds like you have an exhaust leak. An exhaust leak can cause a Check Engine Light. It will give the O2 sensors a false reading. The exhaust runs nearly the length of the car and consists of two catalytic...

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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.