P0414

DTC P0414
Secondary air valve power stage fault Drive cycle D:Signal out of range - below minimum.

Possible causes by suggested order of priority:
- Connector C0572 C0573 C0575 ECM C634 (B) ECM C636 (B) C641 C0879
- Open Circuit C636/43 (RG) - C641/1 (RG)
- Short Circuit C636/43 (RG) - Ground
- Open Circuit C636/42 (US) - C641/3 (US)
- Short Circuit C636/43 (RG) - Ground
- Open Circuit C641/2 (NK) - C634/8 (NO)
- Short Circuit C641/2 (NK) - Ground
- Open Circuit C0879/2 (R) - C0573/1 (R)
- Short Circuit C0879/2 (R) - Ground
- Open Circuit C0879/1 (B) - C0563/1
- Open Circuit C0575/2 (NG) - ECM
- Short Circuit C0575/2 (NG) - Ground
- Open Circuit C0572/3 (NO) - C634/8 (NO)
- Short Circuit C0572/3 (NO) - Ground
- Fuse 37 (30 Amp)

Connector C0572 C0573 C0575 ECM C634 (B) ECM C636 (B) C641 C0879
- Check for connector not correctly latched, backed out pins, damaged pins, corroded pins

Open Circuit C636/43 (RG) - C641/1 (RG)
- Check resistance > 1M Ohm

Short Circuit C636/43 (RG) - Ground
- Check resistance < 5.0 Ohm

Open Circuit C636/42 (US) - C641/3 (US)
- Check resistance > 1M Ohm

Short Circuit C636/43 (RG) - Ground
- Check resistance < 5.0 Ohm

Open Circuit C641/2 (NK) - C634/8 (NO)
- Check resistance > 1M Ohm

Short Circuit C641/2 (NK) - Ground
- Check resistance < 5.0 Ohm

Open Circuit C0879/2 (R) - C0573/1 (R)
- Check resistance > 1M Ohm

Short Circuit C0879/2 (R) - Ground
- Check resistance < 5.0 Ohm

Open Circuit C0879/1 (B) - C0563/1
- Check resistance > 1M Ohm

Open Circuit C0575/2 (NG) - ECM
- Check resistance > 1M Ohm

Short Circuit C0575/2 (NG) - Ground
- Check resistance < 5.0 Ohm

Open Circuit C0572/3 (NO) - C634/8 (NO)
- Check resistance > 1M Ohm

Short Circuit C0572/3 (NO) - Ground
- Check resistance < 5.0 Ohm

Fuse 37 (30 Amp)
- Check for fuse not correctly inserted, fuse blown, fuse connections loose, damaged or corroded.
- Certain diagnostics may also perform further checks to try and narrow down the fault. Eg Check if other circuits fed by the same fuse are also experiencing problems