Fault codes after fault codes.

[Richypal]

Could anybody give me some advice on this please. I have a pd150. Went into limp mode a few days ago throwing up faults.
Open circuit/ground short on
fuel pump relay
N75
Coolant sensor
Inlet manifold control flap.

I changed the n75 and fuel pump relay and struggled to clear the faults, until today when I disconnected the coolant sensor, put some contact cleaner on it and then reconnected which let me clear the fault codes.

Short while later it went back into limp mode with different codes.

Fuel pump malfunction
Egr
Maf sensor.

Could this be due to a faulty coolant sensor or bad wiring/earthing. I have a coolant sensor on order. I’m running out of ideas tho. Don’t want to be paying an auto spark to look at it tbh.

 

[bruceR]

If I was you I would get a tube of silicone grease and go around as many plugs as possible and squeeze some grease into both sides of the plugs then push them together.
This is good practice once a year


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