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hi i have the above car and im having problems with it, it recently had a new engine fitted and now it wont boost, i can dfive it with the air flow disconected soon as its plugged back in you try to pull off it cuts out (think it over fuels) i replaced the air flow meter and still does the same, i have had it on vagcom and get the following errors.

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06A 906 018 CG 1.8L R4/5VT MOTR HS D02 Coding 04000WSC 00028

Error Number Error Description

18010 (P1602)Power Supply (B+) terminal 30 Low Voltage INTERMITTENT

1262- -------Wastegate Bypass Reg. Valve -N75 Output Open INTERMITTENT

16500 (P0116)Engine Coolant Temperature Circuit Range/Performance INTERMITTENT

any help please
 

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18010 - Power Supply B+ Terminal 30: Voltage too Low



Possible Causes

  • Cables on the Battery were removed
  • Battery weak (voltage)
  • Generator Disfunction



Possible Solutions

  • Check Battery Cables
  • Check/Replace Battery
  • Check/Replace Generator



Special Notes

  • If multiple Control Module have Power Supply Faults stored, it's most likely to be one common Problem like the ones shown above. Otherwise when only one or two Control Modules have such Codes stored you better start searching at the individual Power Supply of these Modules.

Engine Coolant Temp. Sensor (G62): Implausible Signal



Possible Symptoms

  • Starting the engine when engine is warmish or warm, idle rpm immediately is 1200 - 3000 rpm.
    • Diesel: an indication is extreme long time burning time of the glow indication light.
  • With all engine temperatures seldom idle rpm will vary between 900 - 1000 rpm.
  • With engine warm (90 °C) the engine temperature suddenly drops (70 °C) and slowly comes back to 90 °C.



Possible Causes

  • Wiring and/or connections faulty
  • Engine Coolant Sensor (G62) faulty



Possible Solutions

  • Check wiring and connections
  • Replace Engine Coolant Sensor (G62)

01262 - Solenoid Valve for Boost Pressure Control (N75): Output Open



Possible Symptoms

  • Reduced Power Output
  • Boost Pressure too Low



Possible Causes

  • Wiring from/to Solenoid Valve for Boost Pressure Control (N75) faulty (Open Circuit)
  • Solenoid Valve for Boost Pressure Control (N75) faulty



Possible Solutions

  • Check/Replace Solenoid Valve for Boost Pressure Control (N75)
 
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