Powertrain
generic / SAE
P2605
Intake Air Heater B Circuit / Open
The controller cannot drive the secondary intake air heater (heater grid B) used on diesel engines for cold-start support. The grid stays cold so cold-start emissions and white smoke increase.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number6 / 05
Possible causes
- Open heater grid element high
- Failed heater relay or open coil medium
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 120–600 €
- Estimated time: 0.8–2.5 h
- Component: intake air heater b
- Component: heater relay
- Component: wiring harness
- MIL / check engine light
Sources
References
sae:J2012