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Here's the full DTC :

18048 - Internal Control Module: EEPROM Error
P1640 - 35-10 - - - Intermittent


It's not documented on the Ross-Tech website.

It doesn't say which EEPROM that's at fault - or is there just the one, ie in the ECU itself?

Anyone had this before or know what the problem might be?

Help appreciated, as always.

the ignition control modules located on top of the airbox maybe?

it happens occasionally, I've seen it on a few standard cars too. Clear it and don't bother

Mihnea

Thanks Mihnea

5051A shows this as checksum error for ecu, this would normally be replaced. seen this on an RS6, hope it wasnt chipped, his wife said not!
Gets sent to factory and would have been redebited if so.

@Morpheous: an "EEPROM error" as opposed to "EPROM error" does not mean that there is a checksum error in an ECU. I have seen this code on a few stock cars, erased it and never came back. The cars were 100% stock and had always been, they had never been flashed back to stock.

When you get "EPROM Error", you generally can't erase the fault code and that means a checksum error, which generally is due to the car being tuned.

Just my 0.02,

Mihnea

S2tuner wrote:
Just my 0.02,

Mihnea

Is that euro cents or pence...?

Thanks for the clarification by the way

I had the same a few days back and mentioned it to Doug on wednesday when my laptop finally booted up for me to show him the code and he'd never seen it before.

I think dummi might be on the right lines as mine appeared after I had the aibox out to replace the filter and disturbed the wiring in the process.

My tuppence worth as well

Heres a quid, knock yourself out!

Call it what you want still the same result from the factory.

And I am telling you from experience that this fault code can occur on cars that have never been chipped and it won't be a defective ECU. The code can occur after for instance disconnecting the battery whilst the ECU is still in its "afterrun" mode, where it writes different adaptation values to the EEPROM (not the same as the main memory which is the EPROM). If the car starts, the code clears and doesn't come back, don't bother, period.

End of story, you're the best, I won't reply anymore to posts where you know better than anyone else.

Mihnea

I have also seen this code on standard cars from A2 to W12. and as you say, sometimes it clears and never comes back.
With warranty stuff though,you go by ELSA, its the law as far as the factory are concerened.
Not just Engine CU, seen it in airbag, parking brake dash insert etc..

Well my money's on Mihnea even if it is only 2p...