307cc faults (U0122, U2003) and (P1403, P1404) and P1435

[MixerFistit]

Hi, in the process of hunting down a few remaining faults with the 307cc. Just cleared a brake switch coherence issue either by cleaning the internal contacts or by adjusting that zip tie/ratchet style push pin, whatever it worked if anyone's interested (cruise control remained functional even when this was a persistent fault) .

I've got 5 faults remaining (scanning with a decent reader and FAP app) Lexia is separated from me for a while but have done previous scans.

P1435 - Additive tank, doesn't seem to be causing an issue at the moment so possibly a fight for another day, dpf is reporting that it's clearing and pressure diff seems OK.

P1403 & P1404 are presumably related to each other - additional heating circuits. But does this mean the electric heater (I think this is working) or something on the EGR circuit (EGR has been cleaned and seems to function and I also cleaned the anti shudder flap which also seems to work along with what looks like an intake temp sensor which was badly gunked up).
If someone can point me to what to look for or even what these circuits refer to that be great.

U1022 CAN comms with ESP. I do not get the ESP light on while driving, although testing braking with some sudden stops in an industrial estate I haven't been able to achieve any pedal pulsing despite getting the tyres to screech... So that's not great..
Where to start looking, bearing in mind no ESP light (it lights up during pre-ignition test)? I did manage to get the ESP light on about a month ago during a sharp turn and acceleration in the wet, but there's not many places I can try this safely. It doesn't seem to come on if I pull off and wheel spin on a steep hill and I'd expect it too (or does it only activate above a certain speed?).

Finally, U2003, not sure if this is linked to the above. Reawakening ECU controlled remotely - ECU Reawakening request not plausible.
I don't seem to have any symptoms that I'm aware of. Although my central locking doesn't work with the key, it only opens the drivers door, it works fine with the remote so that's probably an unrelated physical switch issue in the door


Any input for any of the faults very much appreciated.

[mickthemaverick]

Have a look through this thread on the Peugeot forum for the 1403/4 fault codes and see what else you find: https://www.peugeotforums.com/threads/p ... es.367220/ The codes are covered from the 6th post down.

[MixerFistit]

Useful information in there, thank you. Time to dust off the multimeter then