Citroen C5 2.0i, 2005 with error "depollution system faulty"

Error "depollution system faulty" shown in multi-display and check engine light lit.

Check engine light lit, but the engine was running normal.

I read the ECUs Diagnostic Trouble Codes (DTC) and got error code P0170 (Fuel supply correction).

I filled the petrol tank full and added a bottle of Fuel Injector Cleaner.
I then took the car for a "blast", 30 min. running at 110-120 km./h. (approx 70 miles/hour).
Afterwards I deleted the error code.
The error code has not reappeared.

Refurbishing a VW T4 alternator, Bosch 074 903 095J, 120A

Bosch 074 903 095 J, 120 A alternator.

1. Remove 2 x nuts and one screw. (Red circles)
2. Remove the plastic cover.
3. Remove 3 x screws. (Green circles. Gree "U" under the plastic cover)
4. Remove the voltage regulator.
5. Remove the 4 x screws holding the two major metal housing parts together. (Purple circles)

6. Pry the alternator housing apart. (Purple arrows)

7. Pull the ball bearing upwards.
8. Use a sharp knife to remove the wires from the slip ring. (Green rings)
9. Pull the slip ring upwards. When you install it again, make sure the plastic "lip" is in the right position. (Red ring). It is possible to install it 180 ° wrong.

10. Remove the 24 mm. nut and washer. Use for example a XZN Screw Bits to hold the pulley. (Purple arrow)
11. Remove the pulley.

12. Remove the 4 x screws (Green rings)
13. Pull the metal housing away from the axle.

 14. Pull the ball bearing and the distance ring away from the axle.
The installing order is according to the picture below.

Parts: Slip ring

 Ball bearings: SKF 6303-2RSH, SKF 6003-2RSH

Voltage regulator: 

Manufacturer	Part Number
BOSCH	038903803
BOSCH	F00M145200
BOSCH	F00M145209
BOSCH	F00M145218
BOSCH	F00M145225
BOSCH	F00M145237
BOSCH	F00M145296
BOSCH	F00M145337
BOSCH	F00M145354
PORSCHE	00004320637
VOLKSWAGEN	038903803
VOLKSWAGEN	038903803E
VOLKSWAGEN	038903803EX