T6 CAAB Multiple Exhaust Gas temp sensor faults

john97e

New Member
VIP Member
Hi
I've solved many issues over the years by searching through the forum but this time I'm stumped.

I started with an auxiliary coolant pump failure which I replaced, this was followed immediately by the DPF light coming on and then clearing after a forced regen, and a few day later I have circuit malfunctions on Exhaust Gas Temp sensors 2,3 and 4, and engine coolant temp sensor 2 high, fan is running full time

Codes are P218500, P203100, P242A00, P246E00

Attached is a snapshot taken from Carscanner Pro of the sensors with engine off, with engine running they flicker between normal running temp and 1000 deg. Ignore DPF in and out temps as they are a double up

I have checked as much wiring as I can without pulling out the battery and hunting around the ECU.

All of this is to ask, does anyone know if these sensors share a common power feed/earth/relay- anything at all that I should go hunting for? Any other guidance would be greatly appreciated

Many Thanks

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