Code C0077 indicates that the Tire Pressure Monitoring System (TPMS) has detected that one or more tires are inflated below the minimum calibrated threshold. This is a chassis code triggered when the pressure sensors report a value lower than the manufacturer's specified limit.
Natural air permeation over time or temperature drops causing pressure to fall below the trigger threshold.
A nail, screw, or other debris causing a slow or rapid leak in the tire carcass.
Internal sensor failure or a depleted battery within the wheel-mounted sensor.
A leaking valve core or damaged valve stem allowing air to escape.
Damaged wiring between the TPMS receivers and the vehicle's communication network.
A malfunction in the module responsible for processing tire pressure data.
Yes, as air temperature drops, tire pressure decreases, which can trigger the TPMS warning even if there is no leak.
No, it can be caused by a failing sensor battery or a slow leak that hasn't yet caused a total flat.
No. It is extremely rare for the computer to cause this code; the issue is almost always related to the air pressure itself or the individual wheel sensors.