List of errors

QI’m after a bit of advice on my sons 2006 SEAT Ibiza 1.8T FR. The list of errors that have been detected are as follows: P0444 – P0418 – P0010 – P0414. The car has just gone onto 100k. The engine starts fine, but when running the boost only goes up to 4psi and then flattens off at that. The errors and 4psi detection are coming from an OBD connector and app my son has on his phone.

So far, my son has replaced the cam sensor hoping to irradiate that error code, but it didn’t work. The car has been misbehaving for a while. My son has removed the PCV system and fitted one of those oil catch cans but I don’t think that could have any bearing on this behaviour as it behaved poorly before doing that.

The engine MIL is lit. My question is – will the cam sensor problem cause a kind of safe/ limp-mode scenario and stop the turbo boosting?

I have not had a good look at the car myself yet. My son has also replaced the N75 valve, and he has tested the wiring to the N75 with 12V on one wire and 3 to 5V on the other wire. Is there an easy way to test the wastegate and turbo actuator?

I need to do a bit of learning to try and get to the bottom of this problem. Are the wastegate and diverter valve the same thing, just named differently or are they different components? The secondary air intake has been removed as well and I’m assuming everything is blanked off properly from doing that process.

Thanks Steve and any advice you can offer is much appreciated.

Ian Turner

AThe code P0444 indicates that the Evaporative Emission (EVAP) canister purge valve circuit has an open circuit. The code P0418 that there is a problem with the secondary air injection (AIR) pump relay A or a circuit malfunction. The code P0010 indicates that there is a circuit malfunction with the Camshaft position (CMP), intake/left/front, bank 1. And the code P0414 indicates that the secondary air injection (AIR) solenoid A has a short circuit.

With the EML on then the engine may be in limp-mode, and this will reduce the performance, but no action would be taken by the ECM directly to prevent the turbo boosting. The turbo may not boost due to the parameters not being reached.

The removal of the PCV system may have been a factor in the problem but this would depend on if anything has been disconnected in the process.

The codes all have one common denominator and that is a circuit malfunction and may be referring to an open or short circuit. With this in mind I would first examine both the engine loom and connectors, and the ECM multiplug, for any signs of corrosion or water damage.

As the camshaft sensor code did not clear after the replacement of the sensor, it can be assumed that this is due to a circuit problem, as any mechanical fault would give a different fault code.

With this in mind a good check of the wiring system and the multi-plugs should be carried out, look closely at the engine management system plugs for any signs of green verdigris which may be the result of damp in the plug. If nothing comes to light, then the wires should be checked using a continuity meter to ensure an internal break in the loom is not the cause of the problem codes.