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DTC codes / P0Dxx · Hybrid propulsion / P0D70

P0D70A/C Compressor Control Module Internal Temperature Sensor A Circuit

P0D70 indicates that the air conditioning (A/C) compressor control module has detected a fault in the internal temperature sensor circuit for sensor A, which monitors the compressor's internal temperature to prevent overheating. The module compares the sensor signal to expected values and sets this code when the signal is out of range, erratic, or missing.

SystemPowertrain
Code typeGeneric (all makes)
SeverityMedium
Fix difficultyProfessional
AreaHybrid propulsion

Symptoms you may notice

  • The A/C may stop cooling or blow warm air intermittently or completely.
  • The A/C compressor clutch may fail to engage, causing no cold air.
  • The climate control panel may show a flashing or steady warning light.
  • In some vehicles, the A/C system may default to a reduced performance mode.
  • Often no symptoms besides the warning light, especially if the sensor fault is minor.

Common causes, most likely first

  1. Faulty internal temperature sensor A inside the A/C compressor control module.
  2. Damaged or corroded wiring or connector at the compressor control module.
  3. Open or short circuit in the sensor signal or ground circuit.
  4. Failed A/C compressor control module (internal electronics).
  5. Low refrigerant charge causing abnormal compressor temperatures and sensor readings.
  6. Poor electrical connection at the module harness due to vibration or moisture.
  7. Aftermarket or incorrect sensor installed during previous repairs.

How to diagnose and fix it

  1. Use an OBD-II scanner to confirm P0D70 and check for related codes in the climate control module.
  2. Inspect the compressor control module connector and wiring for corrosion, loose pins, or damage.
  3. Measure resistance and voltage on the sensor circuit according to the manufacturer's specifications.
  4. Check refrigerant charge and system pressures to rule out low charge as a cause.
  5. If the sensor is accessible and testable, compare its readings to a known good sensor or use a scan tool to view live data.
  6. Replace the internal temperature sensor or the compressor control module if testing indicates a failed component.
  7. Clear codes and verify the repair by running the A/C system and confirming the code does not return.

Hidden causes of P0D70 you might miss

  • A low refrigerant charge can cause the compressor to run hotter than normal, triggering the internal temperature sensor to set this code even when the sensor itself is fine.
  • The sensor is often integrated into the compressor control module and may not be serviceable separately, leading to module replacement.
  • Intermittent wiring faults due to vibration or heat can set this code without leaving permanent symptoms, so wiggle tests are essential.
  • Some vehicles may not illuminate the A/C warning light for this code, making it easy to overlook during routine scans.
  • Aftermarket compressors or modules may have different sensor characteristics and can set this code if not properly calibrated.

Can I keep driving with P0D70?

You can usually continue driving with this code because it primarily affects A/C performance and does not compromise engine safety. However, avoid using the A/C system until diagnosed to prevent potential compressor damage from overheating, and address the issue promptly to maintain cabin comfort.

Tools that help

Tools we recommend are in the Auto Veteran shop on Amazon. As an Amazon Associate we earn from qualifying purchases.

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

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