Riyami

Hello

i bought my S500 2006

2 days ago

the problem is

while i drive the car sometimes dose not response and cuts power from the engine as if your pressing the pedel but the car is stalled
not smooth acceleration it cuts and goes rough and some times
stalls and even if i press the pedal there s is no power the speed is constant

there is no check engine light on

i changed the Fuel Pump - assuming there is no enough petrol going to the engine still no solve

changed fuel filter - still no solve

changed the spark plugs - still no solve

changed engine oil and filter - no solve

--

i bought OBD 2 and scanned for fault codes

All faults came as power train
OBD-II DTC: P0171 System Too Lean (Bank 1)
OBD-II DTC: P0175 System Too Lean (Bank 2)

-

list of fault codes -






please any thoughts ?

Nickthegreek

P0629- fuel pump "A" control circuit high
P0637- power steering control circuit high
P0657- actuator supply voltage circuit open
P0649- speed control lamp control circuit
P0641-sensor reference voltage circuit open
P0653-sensor reference voltage b circuit high
P0633-immobilizer key not programmed ecm

Something seems to be going on with your electrical system. Maybe check for simple stuff like loose/corroded wires, maybe something got unplugged, battery voltage, alternator, blown fuses/relays. The electrical systems are so complex without star you might have to take it to somewhere that can diagnose where the problem is coning from

Nickthegreek

As for the too lean conditions cleaning your maf sensor might help