What Does This Indicator Mean?
The Geely Yellow Tire Pressure Monitoring System (TPMS) warning light illuminates on your instrument cluster when the vehicle’s Body Control Module (BCM) or dedicated TPMS module detects an abnormality in one or more of your tires. For Geely vehicles—such as the Coolray, Azkarra, Emgrand, or Monjaro—this yellow indicator typically signifies that tire pressure has dropped 25 percent or more below the manufacturer’s recommended cold inflation pressure, or alternatively, that there is an electronic fault within the monitoring circuit itself. Direct TPMS systems utilize radio frequency (RF) sensors mounted inside each wheel assembly to measure actual pneumatic pressure and internal tire temperature, transmitting these telemetry data packets wirelessly to the vehicle’s receiver. Indirect systems use the ABS wheel speed sensors to calculate rotational velocity differences, assuming a low tire has a smaller rolling radius. When a discrepancy or sensor failure occurs, the subsystem alerts the driver via this amber dashboard warning light to prevent compromised vehicle stability, accelerated tire wear, and extended braking distances.
Can I Still Drive with This Light On?
Because this warning indicator carries a yellow severity rating, the mechanical verdict is that you can drive the vehicle for a short distance, but you must exercise extreme caution and proceed immediately to a safe location or service station. A yellow light indicates a system fault or a non-critical pressure deviation, unlike a red catastrophic failure warning. However, operating a Geely vehicle with underinflated tires severely degrades handling dynamics, increases rolling resistance, generates excessive internal tire hysteresis (heat), and risks catastrophic tread separation or structural tire failure at highway speeds. If the light is flashing initially before staying solid, it typically points to an internal TPMS sensor battery failure or system communication error rather than simple air loss, but you should still verify tire pressures manually using a calibrated gauge before undertaking any extended driving.
Common Causes of the Warning
- Natural Air Permeation and Ambient Temperature Drops: Tires naturally lose approximately 1 to 2 PSI of pressure per month due to air permeability through the rubber compound. Additionally, rapid drops in ambient outdoor temperature cause the air molecules inside the tire to contract, frequently triggering the TPMS light during seasonal transitions.
- Punctures and Slow Leaks: Foreign objects such as nails, screws, or damaged valve stems can cause slow, progressive air leaks that eventually drop the tire pressure below the safety threshold established in the Geely BCM configuration.
- Dead or Failing TPMS Sensor Batteries: Direct TPMS wheel sensors are powered by internal lithium batteries with a finite operational lifespan of typically 5 to 8 years. When these batteries discharge completely, the sensor ceases transmission, causing the system to throw a fault code and illuminate the dashboard indicator.
How to Diagnose and Reset It
To properly diagnose and clear the Geely TPMS warning light, begin by parking the vehicle on a flat, safe surface and using a manual dial or digital pressure gauge to check the cold inflation pressure of all four tires, including the spare if equipped. Compare your readings against the manufacturer placard located on the driver-side door jamb. If any tire is low, inflate it to the exact PSI specification recommended by Geely. If physical pressures are correct yet the light remains illuminated, you may need to perform a system reset through the vehicle’s infotainment touchscreen interface or via a dedicated steering wheel menu under the vehicle settings tab by selecting the TPMS calibration or set function. If the light persists or flashes continuously, connect an advanced OBD2 diagnostic scanner capable of reading body and chassis control modules to scan for specific diagnostic trouble codes (DTCs) related to individual sensor signal loss or RF module failures. Replace any malfunctioning hardware, perform a relearn procedure using an appropriate activation tool, and road test the vehicle above 25 miles per hour to verify system recalibration.