89K miles. ALH engine. Problem: reduced power.
VAG codes:
P1549 Boost Pressure Regulation Valve (N75) - Open or Short Circuit to Ground - Intermittent
P1441 EGR Valve (N18) - Open Circuit or Short to Ground - Intermittent
P1144 Mass Air Flow Sensor - Open or Short to Ground
P1252 Commencement of Injection Valve (N108) - Open of Short to Ground - Intermittent
P1550 Charge Pressure Control - Control Deviation - Intermittent
This is not limp mode behavior. The VAG behavior when accelerating and watching the MAF function is exactly what indicates that the MAF was bad (suggested air flow ~800 actual air flow will not go over 400). So I replaced the MAF. When I cleared all the codes with the VAG-tool they did not come back but the power did not come back and the air flow values did not change. I guess the approach is to clean/replace all the tubes and then it is clean the intake manifold. How do I proceed here?
VAG codes:
P1549 Boost Pressure Regulation Valve (N75) - Open or Short Circuit to Ground - Intermittent
P1441 EGR Valve (N18) - Open Circuit or Short to Ground - Intermittent
P1144 Mass Air Flow Sensor - Open or Short to Ground
P1252 Commencement of Injection Valve (N108) - Open of Short to Ground - Intermittent
P1550 Charge Pressure Control - Control Deviation - Intermittent
This is not limp mode behavior. The VAG behavior when accelerating and watching the MAF function is exactly what indicates that the MAF was bad (suggested air flow ~800 actual air flow will not go over 400). So I replaced the MAF. When I cleared all the codes with the VAG-tool they did not come back but the power did not come back and the air flow values did not change. I guess the approach is to clean/replace all the tubes and then it is clean the intake manifold. How do I proceed here?