Right Rear Wheel Pressure Reduction Performance Problem
Your right rear wheel's tire pressure monitoring system isn't working correctly—it's like a smoke detector that can't properly sense when pressure drops. The vehicle's computer detected that the pressure reduction feature isn't functioning as expected.
The ECU monitors pressure reduction performance by comparing sensor readings from the right rear wheel against baseline values and expected deflation rates. It uses threshold logic to detect whether the wheel can properly reduce pressure when commanded or if sensor communication is degraded.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Pressure Reduction Rate | Steady decline over specified interval | No detectable pressure change or erratic readings |
| Sensor Signal Quality | Consistent signal strength above threshold | Signal loss or below minimum acceptable level |
Code C1512 is classified as a serious fault. If your check engine light is flashing — not just steady — pull over safely and do not continue driving. A flashing CEL indicates an active misfire or critical failure that can cause catalytic converter damage within minutes or permanent engine harm within miles. Contact a certified mechanic immediately. Do not attempt roadside repairs on high-severity codes unless you are trained to do so.
Once the fault is repaired, C1512 can be cleared using any OBD-II scanner. Connect the scanner, navigate to "Clear Codes" or "Erase DTCs," and confirm. The check engine light turns off immediately.
The code will return if the root cause was not actually fixed. The ECM re-detects the fault within 1–3 drive cycles and sets the code again.