Engine won't start - Fault codes: P0183 & P0118

[skoda survivor]

2005 Fabia 1.9 TDI refused to start this morning. Engine cranks over, diagnostics shows two fault codes:

P0183 Fuel pump sensor "A" circuit high

P0118 engine coolant temperature sensor 1 circuit high.

 

I have replaced both sensors to no effect. Fault codes still show up and engine won't start. Something is stopping the fuel getting through!

 

Anyone had this problem or know of a solution? Suggestions appreciated.

[sepulchrave]

Can you hear the electric lift pump working?

[Tech1e]

P0183 is a fuel temp sensor not a fuel pump sensor.

However neither that or the coolant temp sensor should stop it starting. It would make it difficult to start but should go eventually. But looking at the codes and them reading circuit high means there is an interruption in the wiring from those sensors to the engine ECU. They are both on the engine wiring harness so I would be checking for issues along there.

[skoda survivor]

Thanks guys, fuel lift pump working, I will check wiring next.

[skoda survivor]

Update: No faults in wiring, so have consulted an automotive electrician who thinks the ecu has developed a fault.. He can reprogramme another ecu so possibly going down that route.

[skoda survivor]

ECU identified as the guilty party. Fleabay to the rescue, secondhand one on the way.. Delphi diagnostics did not identify the ECU as faulty; VCDS did.

[skoda survivor]

Update: Replaced ECU to find car still won't start. checked all fuses and found one missing!!!! Bottom right F48 ECU. Such a fundermental error. Never thought that a fuse would be missing. Only explaination is that it was not fully in, in the first place and came loose. Anyhow car now back on the road and I have a spare ECU.