Screeching sound that gets faster on revs when driving for a few minutes. Definitely audible from outside the car. On first log, got 29E0 - DME: Mixture Control 29E1 - DME: Mixture Control 2 2A2B - DME: Mixture Control 2D2E - DME: Throttle-valve angle - intake manifold vacuum, correlation 30FF - DME: Turbocharger, charge-air pressure too low. On second log, got 2C7B - DME: Oxygen sensor after catalytic converter: Signal, 2C7C - DME: Oxygen sensor 2 after catalytic converter: Signal 2D2E - DME: Throttle-valve angle - intake manifold vacuum, correlation