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isaac chishipula
isaac chishipula Posted on Oct 12, 2015
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WHAT IS THE MEANING OF FAULT CODE 21,24 AND 31

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Geoff Dellow

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  • Cars & Trucks Master 391 Answers
  • Posted on Oct 12, 2015
Geoff Dellow
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21 - VANOS solenoid activation, intake Output digital pulse width (active low)
DME final stage will set flag
whenever a short to ground, a short
to battery voltage or a disconnection
between output transistor and
component exists.

24 - Injector circuit cyl. 4 Output digital pulse width (active low)
DME final stage will set flag
whenever a short to ground, a short
to battery voltage or a disconnection
between output transistor and
component exists.

31 - Ignition coil cyl.5 Input analog timing
DME initiates secondary ignition for
(100 mV) each cylinder then looks for feedback
through shunt resistor in harness to
determine if ignition actually occurred.

Robert Wood

Robert Wood

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  • Cars & Trucks Master 6,139 Answers
  • Posted on Oct 12, 2015
Robert Wood
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Code 430 and 420
Wow!, I answered this about 30 minutes ago, but somehow my answer didn't post.

Fault code 420 is Catalyst system efficiency below threshold, ( bank 1 )
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Fault codes do not determine what part is bad, they just reduce the field for troubleshooting.
This is what I would have checked;
1. Oxygen sensor, upstream ( meaning before the catalytic converter )
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Your problem will be with the emission system.

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Forgot to give my car details in my question about the meaning of fault code P2243. its a 2005 skoda octavia 1.6 petrol

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