Skip the auto shop - Our mechanics make house calls

Q: Glow plug light makes warning sound when driving at high speed

asked by on

when I am driving at high speed the light come on and produce sound, when I stop and switch off then on its when until i speed again

My car has 101000 miles.
My car has an automatic transmission.

A: Hi there. Check the glow plug control relay...

Hi there. Check the glow plug control relay to see if it is malfunctioning. This is a common part to fail on the diesel engines. The light is coming on for a the computer seeing that the engine is too cold. Also, check the coolant temperature sensor to see if it is registering properly. If the temperature sensor is not working then it needs replaced. If you need further assistance troubleshooting your vehicle, then seek out a technician, such as one from YourMechanic, that can assist you with the glow plug circuitry.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: TMPS won't turn off

Hello. If you maintain the pressure on the tires then you do not need to worry about it if the warning light does not bother you. If you want to get it to turn off then you need a computer...

Q: P2047 lost power when accelerating

Hello, thank you for writing in. The code you are receiving is for an issue with the reductant injection valve. This valve is an important part of the air fuel mixing required before the mix is sent into the combustion...

Q: Heater only works at high speeds

If the blower fan is operational, then you might have a clogged cabin air filter. The filter is located behind the glovebox and should be changed periodically, to ensure proper HVAC operation and air volume. If the blower is not...

Related articles

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...