C0077: Low Tire Pressure
The tyre pressure monitoring system has detected low pressure in one or more tyres.
Normal risk
Have it checked soon. Braking distances increase and tyres wear faster.
Short answer · Can I keep driving with C0077?
Usually yes, with care. Braking distances increase and tyres wear faster. Have it checked soon.
What does C0077 mean?
C0077 means at least one tyre is clearly below its set pressure. A puncture, a leaking valve or cold weather are typical causes.
What the car does when the code is set
The tyre pressure warning light comes on.
How the system works
Tyre pressure monitoring either reads sensors in each wheel or compares wheel speeds. When a tyre is clearly below its set pressure, the system warns the driver.
Common symptoms
Possible causes
Listed without ranking. The cause on your car depends on make, engine and mileage — see the maker notes below.
- Low tyre pressureAir escapes slowly through the rubber, a valve or a puncture.
- Temperature dropCold weather lowers pressure in all tyres.
- PunctureA nail or screw can let air out slowly.
- Faulty valve or sensorCorroded valves or failed sensor batteries cause warnings.
- Tyres not relearnedAfter changing wheels or tyres, the system may need a relearn.
How it is diagnosed
- Check all tyre pressures coldCompare them with the label in the door frame or fuel flap.
- Inspect the tyresLook for nails, cuts or bulges.Do not drive on a tyre with a bulge or a cut in the sidewall.
- Inflate and resetInflate to the correct pressure and reset or relearn the system as described in the handbook.
- Have the sensors checkedIf the warning returns with correct pressures, a workshop tests the sensors.
Questions about C0077
Why does the warning come on in winter?
Cold air lowers tyre pressure. Check and adjust pressures when the tyres are cold.
Is it safe to drive with low tyre pressure?
Slightly low pressure is not an emergency, but it lengthens braking distances and wears tyres. Inflate the tyres as soon as possible.