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Old 01-14-2020, 03:36 AM   #1
skyeg3
 
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Default Glow plug codes. Low power

I have a 2005 sprinter. 220k miles. I have the scan guage which I use to read codes and clear them. I've been getting P0671 for about a year now but I've just been ignoring and clearing it as we don't live in a cold area. For a few weeks now I have been getting the following 4 codes:

P0380 - Glow plug heater circuit A
P0671 - Cylinder 1 glow plug circuit / open
P0673 - Cylinder 3
P0674 - Cylinder 4

The code descriptions here are just what I've seen online.

Today when I started the van it seemed to be in limp mode. Having only 10% of regular power. After a few more startups and clearing the codes it seemed to be running normally.

I've been reading on here about other people having issues with glow plugs but I still don't understand exactly what to do. Also - Can anyone recommend a shop or mobile guy to do this near Pacifica, CA? (bay area)

Thanks in advance for help.
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Old 01-14-2020, 01:21 PM   #2
Midwestdrifter
 
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Default Re: Glow plug codes. Low power

Glow plug codes won't cause low power, you probably have some other issue. The first step is to look for boost leaks (cracked hoses, resonator, or loose clamps). These can cause low power without a code.
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Old 01-14-2020, 01:48 PM   #3
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Default Re: Glow plug codes. Low power

Per Midwest.. you most likely have a different issue/code causing limp mode and reduced power. It may not be current when you turn off the ignition and read the codes. And depending on your scanner you may not see the stored (not current) codes.

I’m in the East Bay with a Mercedes C3 scanner and can help.. pretty busy but happy to help. Re: the gp codes; correct in that not a big deal here in Ca, but still an emissions issue none the less.. I’d start soaking them with pb blaster or the like to prep for that job.

Feel free to private message me.
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Old 01-14-2020, 07:35 PM   #4
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Default Re: Glow plug codes. Low power

Thanks for the replies. I forgot to mention that after disconnecting the battery for a minute then restarting all issues went away for our 10 minute drive home. This leads me to believe its not a boost leak issue.
Thanks Vanski, I may take you up on that.
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Old 01-14-2020, 07:41 PM   #5
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Default Re: Glow plug codes. Low power

Do you have an RPM limit lower than the normal ~3800 when this happens?
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Old 01-14-2020, 08:06 PM   #6
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Default Re: Glow plug codes. Low power

Quote:
Originally Posted by skyeg3 View Post
..I forgot to mention that after disconnecting the battery for a minute then restarting all issues went away for our 10 minute drive home...
Thanks Vanski, I may take you up on that.
This indicates you were successful in clearing the code.. until it comes back of course. and often times boost leaks can be intermittent.. but, hopefully that was it! the sub codes (Sprinter specific scanner can get these) will move you from a black and white photo to full color.

it would be best to get the sub codes once the vehicle goes back into limp mode. once again, perhaps this was a fluke instance and you've taken care of it.
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