Is It Safe to Drive With the Glow Plug Light On?

Your diesel vehicle is equipped with glow plugs, and also with a Glow Plug Light that will either come on and stay on, or flash or blink when a fault is detected by the ECU (engine management unit). When the Glow Plug Light comes on, the ECU stores information about the condition that has caused it to come on. A qualified mechanic who has a code reader that is suited to your particular make and model of vehicle can retrieve this information, and then make a diagnosis of the problem and recommend a course of action.

So, can you drive safely with the Glow Plug Light on? It depends on the nature of the problem. Sometimes, when the Glow Plug Light comes on, the engine in your vehicle will go into “safety” mode, in order to prevent any damage to the engine. If this should occur, you might perceive a drop in performance. This is likely not a big deal if you’re just booting around town, but it could present a safety issue if it occurs when you are performing a maneuver like passing or merging on the highway. Here is what you need to do.

  • Get a diagnostic check as soon as possible in order to find out just what the problem is and how to correct it. You don’t want to leave this to guesswork. Much of the time, the problem can be attributed to faulty crank sensors or cams, but there are also other things that can cause the Glow Plug Light to come on.

  • If you must continue to drive, make sure to take it easy. It would probably be best to avoid highway driving.

  • Do not assume that the problem will just go away on its own – it won’t. The Glow Plug Light came on for a reason, and until you find out what that reason is and have it corrected, it is going to stay on.

You can probably drive safely with the Glow Plug Light on as long as you take it easy. But you do need to get it checked out. Always remember, your warning lights are trying to tell you something, and determining whether the message is serious or of little consequence is best left up to a qualified mechanic.


Schedule Warning Light is on Inspection
Service Area

$79.99 - $89.99

Price range for all vehicles
Average rating from 167 customers who received a Warning Light is on Inspection.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Excellent Auto Repair Ratings.

4.2 Average Rating

Auto Repair

Service Hours

7 AM - 9 PM

7 days a week

Phone Number

Phone Hours

Mon - Fri / 6 AM - 5 PM PST

Sat - Sun / 7 AM - 4 PM PST

Address

We come to you at no extra charge

Guarantee

12-month/12,000-mile warranty

Service Area

Recent Warning Light is on Inspection reviews

Excellent Rating


YourMechanic Warning Light is on Inspection Service

Average Rating

4.9/5

Number of Reviews

167

Rating Summary
157
3
4
0
3
157
3
4
0
3

Travis

12 years of experience
414 reviews
Travis
12 years of experience
Volkswagen Beetle - Warning Light is on - Stillwater, Minnesota
Unbenoest to me when you change a battery on a 18 yr. old car you also need more than a code reader to reset the new battery.
Audi A8 Quattro - Warning Light is on Inspection - Minneapolis, Minnesota
Very helpful and very knowledgeable will be using this service again thank you Travis for everything trumbs up

Nicholas

10 years of experience
353 reviews
Nicholas
10 years of experience
Chrysler 300 - Warning Light is on - Durham, North Carolina
Excellent diagnostician. Knowledgeable and caring. Created a desire for him specifically, to do the job. Hope we get him every time!
Honda Accord - Warning Light is on - Garner, North Carolina
I was very happy with Nicholas and his knowledge and expertise about diagnosing the issues with my car. He is honest, reliable and professional. He is now my Mechanic that I will call on for all my car's needs.I will also recommend him to my friends whom have been taken advantage of by other car shops as I have been, and are looking for someone honest , that will not take advantage of them Thank you so much Nicholas for resolving my issue with my car. I feel relieved and happy with the outcome

Lee

37 years of experience
135 reviews
Lee
37 years of experience
Chevrolet Impala Limited - Warning Light is on - Oklahoma City, Oklahoma
Lee is very good at explaining everything and offers helpful information in maintaining my car. This was my first time using MyMechanic and he was able to fix my problem. I will definitely use this service in the future.

Bryant

11 years of experience
396 reviews
Bryant
11 years of experience
Dodge Avenger - Warning Light is on - Indianapolis, Indiana
Bryant knew exactly what was wrong with my Dodge Avenger which was the Throttle Body. He ordered the part for me and booked my appointment. I really appreciate his knowledge and hard work. Highly recommend him!

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE