Q: Hard start and Code P0672 - Low circuit on cylinder 8 glow plug

asked by on

Low circuit on cylinder 8 glow plug... code P0672... will that be my hard start problem? Icp is good...

My car has 158000 miles.
My car has an automatic transmission.

Hello. Code P0672 is the code for a low circuit on glow plug #2. If you are also having an issue with the cylinder 8 glow plug, then both of these issues, together, could be a potential cause for hard starting. The specific purpose of glow plugs is to warm the engine’s cylinders, in order to help make the engine easier to start. As diesel engines do not have a traditional ignition system and rely entirely on temperature and compression to ignite the fuel mixture, if there is any issue with the plugs, or their circuits, the engine may have trouble starting. I would test the glow plug circuits for cylinders 2 and 8 to see if there is an issue, if not with the plugs themselves, then with the circuits or wiring. If you need an official diagnosis of this, a certified technician from YourMechanic can come to your car’s location to inspect the hard start so that this can be repaired correctly.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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!
  1. Home
  2. Questions
  3. Hard start and Code P0672 - Low circuit on cylinder 8 glow plug

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: Shifting

If you have no reverse gear, it's probably pointless to diagnose the other issues. A known, common issue in this transmission (you probably have the Ford 5R110) is breakage of a snap ring on the Low/Reverse one way clutch. That...

Q: Reduced engine light 2008 Ford F250

Hi there - unfortunately, this warning can be caused by countless engine or transmission problems. Check for problems codes which cause this indication. Quite often, this message is a protection for the transmission in particular to prevent damage. I would...

Q: What makes my trailblazer start and die repeatedly? I have changed fuel pump and steering column whats next?

Hello, thank you for writing in. When you address the steering column, I am assuming that you replaced the ignition switch. This is one component that may cause this issues, but you are most likely dealing with an air, fuel,...

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.