P0403 + p2563 + Limp Mode - Leon FR 2.0 TDI Dsg Mk2

[hxychh]

Cars showing the engine codes P0403 and p2563.

Along with this sometimes I get a glow plug light that comes on randomly then goes after a very short amount of time, an Oil pressure warning + the car is also in limp mode.

P0403 Exhaust Gas Recirculation
Circuit Malfunction

P2563 Turbocharger Boost Control
Position Sensor 'A' Circuit
Range/Performance

Is anyone aware of what the issue with my car could be and how I can diagnose it in order to confirm that is what the problem is.


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[mty12345]

If all those things happen at once, i'd guess that it's an electrical problem, maybe something as simple as a loose/corroded ground cable around the engine area. If not then perhaps a problem with the power supply to those sensors. I don't have a wiring diagram for the mk2, but possible all those sensors have a common power feed.

I'd start with visual inpection around the engine, (especially around the area of the affected components) looking for any signs of a damaged wiring harness etc. Also check the battery terminals are secure and free from corrosion. If you follow the main negative lead of the battery back to where it bolts to the cars body, there are often a number of ground cables from the engine that all connect to the body in that area. Check they are clean, secure and free from corrosion. If all good then follow them back to their other ends where they bolt to the engine block etc and check the same.

If all grounds are good, then I'd get a wiring diagram and start checking the power feeds. Look for a common power feed to all the affected circuits.