Powertrain
generic / SAE
P0640
Intake Air Heater Control Circuit
A general circuit fault on the intake air heater control - the ECU cannot drive the grid heater at cold-start.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number6 / 40
Possible causes
- Open in heater or wiring high
Symptoms
- Check engine light on
- Possible limp mode or no-start
- Multiple follow-up faults across modules
- Reset/relearn may be needed after repair
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 120–500 €
- Estimated time: 0.6–2 h
- Component: intake air heater
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012