loads of codes that wont erase????

[nala]

Hi all, got a 2002 megan 1.9 dci that has suffered a collapsed turbo and in the process it ran on its own oil and couldnt be switched off,the engine reved very high then cut out.Luckly the car started the day after without any serious engine noises,so i fitted a new turbo unfortunatly in my hast to fix i did not empty the intercooler of oil and on starting up the engine it ran perfect until i revved it ,then again it over revved on the oil in the intercooler,this time i managed to stall the engine in gear to stop it.The problem now is it wont start and i appear to have a lot of fault codes they are as follows-----

Diesel (F9Q 736 - Bosch MSA 15 - MT - Prog.nr: 00CD,VDIAG 04)
DTC Description Status
DF023 Flywheel signal information coherence; Over revving detected Permanent
DF005 Engine speed needle lift sensor; open circuit Permanent
43 Unknown fault code
44 Unknown fault code
46 Unknown fault code
47 Unknown fault code
48 Unknown fault code
DF036 Accelerator pedal position, open circuit Permanent
DF036 Accelerator pedal position, short circuit to +12V Permanent
DF019 Air flow sensor; short circuit to ground or open load Permanent
DF019 Air flow sensor; Short circuit to +12V, engine running Permanent
DF002 Water temperature sensor; short circuit to ground Permanent
DF002 Water temperature sensor circuit; Open circuit or short circuit to +12V Permanent
DF002 Coolant temperature sensor; implausible signal Permanent
DF022 Inlet air temperature sensor; short circuit to battery Permanent
DF021 Fuel temperature sensor circuit; circuit short to ground Permanent
DF075 Atmospheric pressure sensor Permanent
DF075 Atmospheric pressure sensor Permanent
DF004 Vehicle speed sensor; signal out of range, too high Permanent
DF004 Vehicle speed sensor; input frequency too high Permanent
DF045 Preheater unit control; open circuit Permanent
DF123 Thermoplunger relay N2; Open circuit or short circuit to ground Permanent
DF124 Thermoplunger No1 relay circuit, short circuit to+12V Permanent
DF050 Overheating warning light; short circuit Permanent
DF043 Cruise control stalk, open circuit Permanent
2A0B74 Unknown fault code
E90036 Unknown fault code
900000 Unknown fault code
A909D6 Unknown fault code
9F0000 Unknown fault code
05C200 Unknown fault code
500100 Unknown fault code
these faults wont erase ,and it wont start, anyone any ideas any info appreciated ,regards nala.

[davelowe]

Have you actually properly cleaned everything up yet (intercooler, pipework, sensors, etc)? You have probably covered the new turbo in shite as well as a lot of other stuff.

What electronics did you disconnect during the process? The reason I ask is that most of these codes seem electrically related.

It sounds a mess. Have you had a look at the glowplugs?

I would take off the bumper, and remove every single piece of tubing and sensors and clean them (and the new turbo).

The fact that the codes won't clear is less important - it depends on what you have hooked up - permanent isn't necessarily so.

These codes concern me most.

DF005 Engine speed needle lift sensor; open circuit Permanent
DF036 Accelerator pedal position, open circuit Permanent
DF036 Accelerator pedal position, short circuit to +12V Permanent
DF019 Air flow sensor; short circuit to ground or open load Permanent
DF019 Air flow sensor; Short circuit to +12V, engine running Permanent
DF002 Water temperature sensor; short circuit to ground Permanent
DF002 Water temperature sensor circuit; Open circuit or short circuit to +12V Permanent
DF022 Inlet air temperature sensor; short circuit to battery Permanent
DF075 Atmospheric pressure sensor Permanent
DF075 Atmospheric pressure sensor Permanent
DF045 Preheater unit control; open circuit Permanent
DF123 Thermoplunger relay N2; Open circuit or short circuit to ground Permanent
DF124 Thermoplunger No1 relay circuit, short circuit to+12V Permanent

[nala]

Hi ,sorry maybe i should have said ,all pipes and sensors are now cleaned out,and the glowplug timer and glowplugs all check out ok,was wandering if the cranksensor incoherance could mean the belt timing has jumped a tooth,i havent checked that yet.!!!!

[nathan black]

i am pretty sure you have got the battery on the wrong way round. also if you have you are probably going to need a new alternator. sounds like you have put a live up all the earths

[nala]

Hi ,the battery is not on the wrong way round,all these faults have occured after the engine was run and it revved itself up,is it possible the alternator could have burnt out anyhow ??and if the alternator was burnt out wouldnt it still run just not charge??

[nathan black]

yes the engine would still run just the battery wouldn't get charged and this could be indicated by the battery light being on. also if the the alternator was blown the electric steering would not work

[davelowe]

I would be most interested to hear how this turns out. I hope the ECU isn't kaput.

[monkeymanmonk]

Me too,sounds like a whole mess to me.Maybe get it transported to Renault and get them to read all the faults with there software and see what they say.It will be cheaper than replacing things that might not be the cause and then you will know the exact cause befor spending more money.And we all know how expensive these things can end up.
Good luck.

[davelowe]

Me too,sounds like a whole mess to me.Maybe get it transported to Renault and get them to read all the faults with there software and see what they say.It will be cheaper than replacing things that might not be the cause and then you will know the exact cause befor spending more money.And we all know how expensive these things can end up.
Good luck.

Got to agree really. Try an independent Bosh outfit before Renault. One thing is certain, they know nothing about their own cars.

[nathan black]

for something to bring up so many faults like that it has to be something to do with the power to the car i.e battery, alternator maybe starter.

[davelowe]

for something to bring up so many faults like that it has to be something to do with the power to the car i.e battery, alternator maybe starter.

This doesn't help the original poster much, but if the ECU shows many faults, it maybe broken, mis-connected, or full of water. It might be broken beyond repair. A hair dryer might fix it. Then again, the problem could be due to a faulty earth or shorted battery cell. There are many possibilities.

Conclusion: It is unlikely that all the individual components have failed. It maybe a general fault (earthing corrosion, for example), but the presence of so many codes indicates either a major electrical fault (dead battery), one fault leading to misleading codes, or for some unconnected reason, ECU failure.

[nala]

Hi all, thanx for all replies,finally got to bottom of it ,battery turned out to be duff,replaced that then all fault codes cleared .Car still wouldnt start though.removed glow plugs to do a compression test and while testing cylinder 1 noticed that cylinder 2 was chuffin a lot of fuel out of the glowplug hole.all compressions were ok ,so i removed all injectors and found the injector in cylinder 2 was melted on the tip,basically there was one big hole at the end of the injector spewing fuel out ,so this reduced fuel pressure to the rest of the injectors.Replaced number 2 injector for a new one and the car started and runs absolutly fine.So it looks like when the turbo blew and the engine revved on its own oil ,it caused the injector to melt and that stopped it running.Cost £110.00 for a new injector and my own time ,think ive been very lucky realy could have been a lot worse,thanx again everyone.
regards alan

[nathan black]

hi did you have to get the injector coded in and if so how much was it.
thanks

[davelowe]

Nice one Alan! It's always good to see a weird situation successfully resolved!

[nala]

Hi just to answer last question the injector didnt need coding just fit it and started up.
Regards alan