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Error code P1123 for 03 Hilux 3lt Diesel???


Powy

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Hello all

I have an 03 3 litre diesel 1KZTE  or KZN16R ????, recently the engine light came on and the engine went into limp mode (turn off and on again it disappears), happened a few times and only seems to happen once the engine has warmed up.

OBD scanner shows a P1123 error code - "valve for coolant circuit" 

Has anyone on here had similar issues and if so what is the common fault, what part needs replacing etc?

TIA

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