[svxistentialist]

Originally Posted by htyei

Codes that came back after clearing:


34 EGR solenoid valve EGR solenoid valve inoperative.
37 O2 sensor 2 (LH) O2 sensor 2 inoperative.
23 Air flow sensor Abnormal voltage from air flow sensor.
56 EGR system (CAL.) EGR calve open/close stick, EGR hose disconnect or exhaust pressure valve damaged.

Henry

All of these indicate that the ECU, the fuel computer, is getting wrong readings and can't control the mix to give the optimum stoichmetric burn.

Worst case scenario, all four are bad and need to be replaced.

However, since you have already been advised that the MAF can give the symptoms you are getting, it's an obvious place to start.

Money for parts might be an issue, but it is unwise to drive what is an expensive car, and do nothing about the trouble codes it gives you.

If you have a friend nearby with an SVX, a non-expensive start would be to borrow the MAF from the good car for 20 minutes. Clear the codes and bolt the good MAF into your car. After a drive if it comes back with some or all of your other 3 codes, then you may need to investigate them and replace what is necessary. I would bet if the MAF readings are primary cause of your trouble, the two O2 codes may go away when the MAF is replaced.

Best of luck checking it.

Joe