Car cranks but no start

sol_j

Active Member
Aug 16, 2024
68
9
About a week ago, my car started having an issue where it would crank but not start. Electrics came on, but I noticed I couldn’t hear the fuel pump priming anymore (I think I first noticed that a week or two before but didn’t think much of it).


Called out my breakdown cover, and after checking it over, they reckoned it was the relays under the steering wheel – rusted out. I ordered a new fuel pump relay (409), a 100 relay, and a used 377 one as replacements.

That same day, once the car started, I drove it straight to the local garage, but they told me I couldn’t leave it there as they had no space, so I took it back home. It did cut out on the way, but I just about got it started again.

I fitted the new relays yesterday and it started fine – no issues. But this morning, less than 24 hours later, it wouldn’t start again. First time I’ve noticed the ABS light come on with the car as well, if I remember right.

I’ll probably get breakdown out again, but has anyone got any ideas what else it could be? Do you reckon it might be the fuel pump itself or maybe the crank position sensor?
 

sol_j

Active Member
Aug 16, 2024
68
9
Any fault codes?
I got this code when I scanned it last time (last Thursday.) I haven’t scanned it yet.
“1 Fault Found:
01314 - Engine Control Module
49-00 - No Communications”

what do you think?

I got it under a few modules, as in the screenshots:
 

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sol_j

Active Member
Aug 16, 2024
68
9
Update: idk why I didn’t put two and together but after the recovery guy came, we realised the ecu is dead as the engine light does not come on so obviously stuff like the fuel pump doesn’t prime. Is this a common issue with these to die? Is it worth getting an immo off one instead to save headache and just work? Also is it easy to remove from the car? Under the scuttle panel right?
 

Battoussai

Active Member
Mar 22, 2016
533
183
Portugal
Ahhh that is harsh! ECU dying is a PITA.
After some reading I found out you have to recode the immobilizer so your car keys can start the car.
And yes, the ECU is under the scuttle. Check this video: ECU swap

Are you going to buy a used ECU? Must be the EXACT same serial number.
 
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sol_j

Active Member
Aug 16, 2024
68
9
Ahhh that is harsh! ECU dying is a PITA.
After some reading I found out you have to recode the immobilizer so your car keys can start the car.
And yes, the ECU is under the scuttle. Check this video: ECU swap

Are you going to buy a used ECU? Must be the EXACT same serial number.
I bought an immo off one after getting the right part number from AUTODOC lol. Cba and just want it to work. Is this a common problem? How would this happen? Just age? The one I needed 06A 906 032 HN
 

Battoussai

Active Member
Mar 22, 2016
533
183
Portugal
I bought an immo off one after getting the right part number from AUTODOC lol. Cba and just want it to work. Is this a common problem? How would this happen? Just age? The one I needed 06A 906 032 HN
Usually is water ingress leading to rust some conections. I read could also be the ground point that is near it. After you get it out, check for rust or seized connector and try it again before buying new one.
 

MoToJoJo

Active Member
Mar 25, 2014
855
695
Northants
From the factory the cars had a plastic cover over the ECU, most cars lose this over time and if you're unlucky, rain gets in and kills the ECU.
 
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