C0077

C0077-LOW TIRE PRESSURE
^ When Monitored:
Continuously.
^ Set Condition:
A low pressure condition will exist when the tire pressure falls below or is equal to the low pressure threshold value as specified for the vehicle.

Possible Causes
- INTERMITTENT PERFORMANCE DTC
- INCORRECT TIRE PRESSURE
- TIRE PRESSURE SENSOR
- WCM (SKREEM)

Diagnostic Test
1. DTC STATUS IS ACTIVE
Turn the ignition on.
With the scan tool, select View DTC's in the Wireless Control Module (SKREEM).
Is the DTC status Active at this time?
YES >>Go to 2
NO >>Go to 4

2. LOW TIRE PRESSURE

NOTE: The DTC can be caused by many different factors and might not be a sensor/transmitter or a WCM (SKREEM) fault. Interference from other elements will over power the sensor/transmitter RF frequency making erratic operation to the in the TPM system. Check the vehicle for aftermarket accessories that could compromise the RF frequency signal before diagnosing the TPM system.
Correct all tire pressure to the recommended specifications and wait 2 minutes.
With the scan tool, clear DTC's in the Wireless Control Module (SKREEM).
Test Drive the vehicle for a minimum of 10 minutes with vehicle speed greater than 15 m.p.h.
With the scan tool, select View DTC's in the Wireless Control Module (SKREEM).
Does the DTC reset or is the status Active for this DTC?
YES >>Go to 3
NO >>Test Complete.

3. TIRE PRESSURE SENSOR
Turn the ignition off.
Replace the Tire Pressure Sensor.
With the scan tool, clear DTC's in the Wireless Control Module (SKREEM).
Test Drive the vehicle for a minimum of 10 minutes with vehicle speed greater than 15 m.p.h.
With the scan tool, select View DTC's in the Wireless Control Module (SKREEM).
Does the DTC reset or is the status Active for this DTC?
YES >>Replace the Wireless Control Module (SKREEM). Perform TPM VERIFICATION TEST. Tire Pressure Monitor (TPM) Verification Test
NO >>Test Complete.

4. INTERMITTENT TIRE PRESSURE SENSOR DTC
The conditions necessary to set this DTC are not present at this time.
Refer to any Technical Service Bulletins that may apply to this condition.
With the scan tool, clear DTC's in the Wireless Control Module (SKREEM).
Test Drive the vehicle for a minimum of 10 minutes with vehicle speed greater than 15 m.p.h.
With the scan tool, select View DTC's in the Wireless Control Module (SKREEM).
Does the DTC reset or is the status Active for this DTC?
YES >>Repair as necessary. Perform TPM VERIFICATION TEST. Tire Pressure Monitor (TPM) Verification Test
NO >>Test complete.