Open circuit in the control wire between the PCM and the refrigerant distribution valve.; Short to voltage on the control circuit, often due to chafed wiring or a faulty connector.; Failed refrigerant distribution valve solenoid (open internal coil).; Corroded or loose electrical connector at the valve or PCM.; PCM internal driver fault, though this is less common.; Aftermarket accessories or improper wiring repairs interfering with the circuit.

DTC codes / P0Exx · Hybrid propulsion / P0EE6

P0EE6A/C Refrigerant Distribution Valve B Control Circuit High

Q: What does code P0EE6 mean?

A/C Refrigerant Distribution Valve B Control Circuit High. P0EE6 indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the control circuit for the air conditioning (A/C) refrigerant distribution valve 'B'. This valve directs refrigerant flow between the evaporator and condenser, and a high-voltage condition typically means the circuit is open, shorted to power, or the valve's internal coil has failed.

P0EE6 indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the control circuit for the air conditioning (A/C) refrigerant distribution valve 'B'. This valve directs refrigerant flow between the evaporator and condenser, and a high-voltage condition typically means the circuit is open, shorted to power, or the valve's internal coil has failed.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaHybrid propulsion

Symptoms you may notice

The A/C may blow warm air or not cool effectively, especially at low speeds or idle.
The A/C compressor may fail to engage or may cycle rapidly.
A noticeable delay in cooling after the A/C is turned on.
The check engine light (malfunction indicator lamp) is illuminated.
Often no symptoms besides the warning light, as the system may default to a fixed distribution strategy.

Common causes, most likely first

Open circuit in the control wire between the PCM and the refrigerant distribution valve.
Short to voltage on the control circuit, often due to chafed wiring or a faulty connector.
Failed refrigerant distribution valve solenoid (open internal coil).
Corroded or loose electrical connector at the valve or PCM.
PCM internal driver fault, though this is less common.
Aftermarket accessories or improper wiring repairs interfering with the circuit.

How to diagnose and fix it

Use a scan tool to verify the code and check for any related A/C system codes.
Visually inspect the valve connector and wiring for damage, corrosion, or loose pins.
Measure the resistance of the distribution valve solenoid and compare to specification.
Check for voltage on the control circuit with the key on and A/C commanded on; a high voltage with the valve disconnected indicates a short to power.
Perform a wiggle test on the harness while monitoring the valve control signal to catch intermittent opens.
If the circuit and valve test good, suspect the PCM and perform a pinpoint test before replacement.
Clear the code and verify the repair with a test drive and A/C performance check.

Don't overlook the simple wiring fault

A high-voltage code often results from an open circuit rather than a short, because the PCM pulls the control line high when it detects no current flow through the valve.
The refrigerant distribution valve is sometimes mistaken for the A/C compressor control valve, but they serve different functions and have separate circuits.
Corrosion inside the valve connector can create enough resistance to set a high-voltage code without any visible damage from the outside.
A failed valve solenoid may still ohm within specification when cold but fail when hot, so testing should include a heat soak if the code is intermittent.
The PCM may set this code as a companion to other A/C codes, so always check for pending codes that could point to a shared power or ground issue.

Can I keep driving with P0EE6?

You can typically continue driving because the A/C system will be disabled or default to a limited mode, but avoid using the A/C to prevent potential compressor damage. Have the fault diagnosed soon, especially in hot weather, to restore cooling performance.

Tools that help

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