The humidity sensor measures the relative humidity of the intake air; on documented vehicles it is built into the mass air flow sensor or a combined sensor. The engine control module uses the value, for example, to correct torque and in emission models. One documented design is capacitive and reports humidity as a pulsed signal with a duty cycle that the control module converts back. P00F6 is set when the signal jumps implausibly within a short time, which typically points to a loose contact.
Medium severity. Can I keep driving?If the car is running normally, drive in moderation to a repair shop. If it loses power or another warning appears, do not continue.
Symptoms
- Check engine light on
- Usually no noticeable symptoms
- Slightly uneven torque or higher consumption possible
Most likely causes
- Loose contact
- Sensor faulty
- Interference on the signal wire
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- Repair difficulty: easy
- It affects emissions.
What each character of P00F6 means
- P: Powertrain: engine and transmission
- 0: Generic code: same on every make
- 0: Subsystem depends on the code range
- F6: Specific fault in that system
Frequently asked questions
Can I keep driving with code P00F6?
If the car is running normally, drive in moderation to a repair shop. If it loses power or another warning appears, do not continue.
What causes code P00F6?
The most common causes are: loose contact; sensor faulty; interference on the signal wire.
Related codes
- P00F2Humidity Sensor Circuit/Open
- P00F3Humidity Sensor Circuit Range/Performance
- P00F4Humidity Sensor Circuit Low
- P00F5Humidity Sensor Circuit High
Sources
- law.cornell.edu: 13 CCR 1968.2
- gsi.ext.gm.com: 18OBDG04 Engine Diagnostics
- gsi.ext.gm.com: 19OBDG03A Diagnostics
Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.