What Does P1471 Mean?
The A/C refrigerant temperature sensor circuit has a malfunction, preventing accurate monitoring of refrigerant temperature. This affects A/C system protection and optimal cooling performance.
Common Causes
45%
Failed A/C refrigerant temperature sensor
25%
Damaged or corroded wiring to refrigerant sensor
20%
Corroded or loose sensor connector terminals
7%
Open or short circuit in sensor ground wire
3%
Low refrigerant charge affecting sensor readings
Diagnostic Steps
1
Step 1: Locate A/C refrigerant temperature sensor (typically on high or low pressure line)
2
Step 2: Measure sensor resistance at various temperatures and compare to specifications
3
Step 3: Check voltage signal from sensor to ECM (should vary with temperature, typically 0.5-4.5V)
4
Step 4: Inspect wiring harness and connector for damage, corrosion, or loose terminals
5
Step 5: Check 5V reference voltage supply to sensor from ECM
Estimated Repair Cost
$120 - $350
Parts + labor, varies by vehicle and location
The A/C refrigerant temperature sensor circuit has a malfunction, preventing accurate monitoring of refrigerant temperature. This affects A/C system protection and optimal cooling performance.
The most common cause of P1471 (A/C Refrigerant Temperature Sensor/Circuit Malfunction) is: Failed A/C refrigerant temperature sensor
Typical repair costs for P1471 range from $120 to $350, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive. A/C system may not operate efficiently or may shut down as a protection measure. No impact on vehicle drivability.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1471 to identify the root cause.
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Quick Info
Category
Powertrain
System
Air Conditioning System
Difficulty
Type
Manufacturer
Recommended Tools
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