OBD-II code · Powertrain (generic, extended)
P2609 Intake Air Heater System Performance
The intake air heater system did not raise intake temperature by the expected amount during cold-start support. Suggests low current draw, poor connection to the grid, or a failed temperature feedback path.
Is it safe to drive with P2609?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyHigh-resistance battery feed to the heater
- PossibleIntake air temperature sensor reads with offset
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.8–3 h
- Emissions test
- Likely to fail
- Parts involved
- Intake Air Heater, Intake Air Temperature Sensor, Heater Relay
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.