CEL Light On. Multiple Fault Codes. Common short Circuit Issue?

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dave100

New Member
Joined
Jun 6, 2012
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14
Car
slk 320
SLK 350. I have the following fault codes up and CEL light on. Cleared and all came back immediately. Suspect they are all linked. To me they indicate there may be a common grounding issue. Or am I barking up the wrong tree here? Car runs fine. Any advice appreciated. Thanks Dave

1186 y22/9 intake manifold tumble flap switchover. short circuit to ground p2009
1066 relay for airpump. short circuit to ground p2557
1070 air pump swuitchover valve. short circuit to ground p0414
0430 heating of component g3/5 left 02 sensor ofter twc (kat) short circuit to ground p 0057
0850 y58/1 purge control valve sort circuit to ground/switchover valve permanently open (Note: I have cleaned and checked purge valve. Clicks in with battery voltage has 3.5 volts constant feed hence permanently open),
1306 power steering pump pressure regulating valve has a short circuit to ground
0442 heating of component g3/4 right 02 sensor before twc (kat) short circuit to ground p0031
0446 " " g3/3 left " " " " " " p0051
0155 component y110 three disk thermostat valve has an open circuit in the wiring p0597
0426 heating of comp[nent g3/6 right 02 sensor after twc (kat) sort circuit to ground p0037
 
First thought is that the under bonnet wiring loom has rubbed through against a metal edge and cut some wires and left others grounded to the body. Chose one of those components that you can get at easily and follow it's wiring.
 

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