Glow Plug Failure Light on 147 1.9 JTD M-Jet - Alfa Romeo Forum
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Glow Plug Failure Light on 147 1.9 JTD M-Jet

I've spent a fortune on my 147 JTD 1.9 M-Jet these last few months, now the Glow plug failure light has come on yesterday. Read that it can just be a glitch due to cold, and if this is the case, will it correct itself or have to be reset? Also, wondering if there's anything I can do myself to check if there's a more serious problem without taking it to garage.

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You can test the glow plugs in situ with an ohm meter.
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If its starting ok don't bother changing them. I ran mine for ages with the light coming on for 30 seconds then going out and didn't do no harm.
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Ive customers cars from half a dozen 147s bundles of 156s and a few maybe 4 or so 159 jtds with glow plug error showing upon start up. One 159 owner replaced the glow plugs changed the relay twice had the ecu "reflashed" by Alfa and it still said glow plug error.If the car starts ok with no misfire then it may not have a glowplug error.
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Originally Posted by JON156VELOCE View Post
You can test the glow plugs in situ with an ohm meter.
You need to do this to identify the faulty one(s) unless you change all.

Similar thread in the 159 lounge. Even has photos IIRC. I had to borrow a tester from keithyboy and quickly identified the one at fault. It is a remarkably easy fix to replace so should only cost about 12-15 if you do just one. 5 mins fiddling to get the equivalent of a spark plug lead off, 3 mins to unscrew the old one carefully then put the new one in.

It will keep going but gets harder to start in colder weather if you leave it. Eventually they all fail as services tend not to replace them.

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147 , failure , glow , jtd , light , mjet , plug

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