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DTC codes / P0Exx · Hybrid propulsion / P0EE5

P0EE5A/C Refrigerant Distribution Valve B Control Circuit Low

P0EE5 indicates that the powertrain control module (PCM) has detected a low-voltage condition on the control circuit for the air conditioning refrigerant distribution valve B. This valve directs refrigerant flow between the cabin evaporator and other cooling loops, and the PCM expects a specific voltage range on its command wire; a reading below that threshold triggers the code.

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

Symptoms you may notice

  • The air conditioning may blow warm air from one or more vents while other vents remain cold.
  • The A/C compressor clutch may cycle rapidly or fail to engage at all.
  • A noticeable delay or complete lack of cooling when the A/C is switched on.
  • The blower motor may run normally but the air never gets cold.
  • Often no symptoms besides the warning light, especially if the valve is stuck in a default position that still allows some cooling.
  • In some vehicles, the climate control head may show a flashing or solid A/C indicator.

Common causes, most likely first

  1. A damaged or corroded electrical connector at the refrigerant distribution valve.
  2. An open or shorted wire in the control circuit between the PCM and the valve.
  3. A failed refrigerant distribution valve solenoid or actuator.
  4. Low refrigerant charge causing the valve to operate outside its expected electrical range.
  5. A faulty PCM driver for that circuit, though this is less common.
  6. Contamination or debris in the A/C system that mechanically binds the valve and affects its electrical feedback.

How to diagnose and fix it

  1. Inspect the valve connector and wiring for corrosion, loose pins, or chafed insulation, and repair as needed.
  2. Check the A/C system refrigerant charge with a manifold gauge set; recharge or recover to the correct level if low.
  3. Measure resistance across the valve solenoid and compare to the manufacturer's specification to rule out an open or shorted coil.
  4. Backprobe the control circuit at the PCM and at the valve to check for voltage drops or shorts to ground with a multimeter.
  5. Command the valve with a scan tool capable of bidirectional A/C controls and observe whether the valve responds and whether the code resets.
  6. If the circuit and valve test good, check for mechanical binding in the valve by removing and inspecting it for debris or seizure.
  7. Replace the refrigerant distribution valve only after electrical and refrigerant charge checks confirm it is faulty, then clear codes and verify the repair.

What the low circuit code really means

  • A low refrigerant charge can set this code because the valve solenoid draws less current than expected when there is insufficient refrigerant to move, so always check charge before condemning the valve.
  • The PCM may set P0EE5 intermittently if the valve connector is only loose when the engine bay is hot, so wiggle-test the harness while watching live data.
  • Some vehicles use a shared ground for multiple A/C valves, and a single bad ground can set codes for several valves at once, so inspect grounds before replacing parts.
  • The code does not always mean the valve is electrically dead; a mechanically stuck valve can produce a low-current condition that mimics an open circuit.
  • After replacing the valve, some systems require a relearn or calibration procedure with a scan tool, otherwise the code may return immediately.

Can I keep driving with P0EE5?

You can usually drive the vehicle with this code because it mainly affects air conditioning performance, but avoid long trips in hot weather if cooling is lost. Have the system diagnosed soon to prevent compressor damage from running with low refrigerant or a stuck valve.

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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