Skip the auto shop - Our mechanics make house calls

Q: Glow plug light

asked by on

Glow plug light comes on; been to the dealership 11times. Fuel filter just changed. Now they tell me I need a new battery! Current battery is 3 years old. Doesn't make sense how the 2 are related & yes, of course I put disiel fuel in it.

My car has 81000 miles.
My car has an automatic transmission.

A: Hi there: I wouldn’t suspect that the glow...

Hi there:

I wouldn’t suspect that the glow plug light and battery are related whatsoever. It is common for a battery to start losing cranking amps after 3 years, so this might seem to be a realistic service that needs to be completed. In most cases, if the plugs have been replaced, and the light is still on, it’s due to the code still being stored inside the ECU. Before you take your Jetta to the dealership again, you should contact a professional mobile mechanic to come to you and have them complete a check engine light inspection to determine what codes still exist; and if the glow plug issue is actually resolved.

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: Moonroof, power locks, and interior lights not working

There are many different reasons why your multiple electrical components may not be functioning. Some of the possible causes include short fuses, faulty switches, and motor damage. You will need to see whether the affected systems have individuals problems or...

Q: car not starting

If the vehicle worked normally prior to your work on the seat, it would appear that something has happened with the circuits (wiring, terminal connections) in the vicinity of the seat. All of that wiring should simply be verified first...

Q: Having problems with ABS on my car

If the rear passenger side wheel speed sensor is reading 0 mph, when the other wheels read 10 mph, you already have done most of the diagnosis. The sensor reading depends on the sensor wheel located inside of the rear...

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...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...