A/C Compressor Temperature Sensor Malfunction
Your car's air conditioning compressor has a temperature sensor that's either disconnected, shorted, or reading incorrectly—like a thermometer that's broken and giving false readings. The engine computer can't tell if the compressor is overheating, so it may disable the A/C to prevent damage.
The ECU monitors voltage from the A/C compressor discharge temperature sensor, expecting a signal that corresponds to coolant temperature between roughly 0–150°C. If the sensor signal is out of range, shorted to ground, or open-circuit, the ECU detects a malfunction and triggers the fault code.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Sensor voltage | 0.5–4.5V (proportional to temperature) | <0.1V or >4.9V, or no signal |
| Temperature range | –40 to +150°C | Out of expected operating range |
Code P1472 is a moderate fault. You can generally drive to a workshop, but avoid long trips or high-load driving (motorway, uphill towing) until it is diagnosed. If the code keeps returning after clearing, or if you notice the symptoms listed above worsening, do not delay professional diagnosis. Many moderate codes have multiple possible root causes — a mechanic with live OBD data can identify the exact fault more efficiently than part-by-part trial and error.
Once the fault is repaired, P1472 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.