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Home / DTC / P0EE5 — A/C Refrigerant Distribution Valve B Control Circuit High

P0EE5 — A/C Refrigerant Distribution Valve B Control Circuit High

Detailed page for trouble code P0EE5.

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P0EE5

Generic P — Powertrain

A/C Refrigerant Distribution Valve B Control Circuit High

Brand: Generic
Type: P — Powertrain
Views: UK: 8 EN: 12 RU: 13
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Page language: EN

Causes

  • Short to battery (B+) on valve B control circuit
  • Open or damaged wiring with intermittent contact causing voltage irregularity
  • Corroded or loose connector at the valve or control module
  • Faulty refrigerant distribution valve B (stuck or internally shorted)
  • Faulty control module or output driver

Symptoms

  • A/C system not modulating refrigerant flow correctly
  • Reduced or inconsistent cabin cooling
  • DTC stored and possible lamp or HVAC warning
  • Valve may not respond to HVAC commands
  • Intermittent A/C performance or compressor cycling issues

What to check

  • Scan for stored codes and freeze-frame data; note conditions when code set
  • Visual inspection of valve B connector and wiring for damage, corrosion, pin push-out
  • Backprobe valve B connector with wiring harness intact while commanding valve on/off
  • Measure supply voltage and signal waveform at the valve with a scope or DMM
  • Measure valve coil resistance (with harness disconnected) and compare to spec
  • Check for short to B+ or continuity to ground with ignition off

Signal parameters

  • Nominal supply voltage: approximately vehicle battery voltage (~11–14.5 V) when power is applied
  • Expected control output: low-side switching to ground or PWM from module; when commanded off voltage may be near battery (if high-side), when commanded on voltage should be pulled low depending on driver type
  • Valve coil resistance: typically low ohms (example 5–50 Ω) — compare to OEM specification
  • Current draw: dependent on valve design, often 0.1–2 A when energized
  • PWM frequency (if used): often tens to a few hundred Hz — confirm with oscilloscope

Diagnostic algorithm

  1. Retrieve code(s) and freeze-frame data. Confirm P0EE5 is current or stored and note operating conditions (ignition state, engine on/off, A/C mode).
  2. Perform a visual inspection of valve B harness and connector for corrosion, melting, loose pins, or repair splice points. Repair any obvious damage.
  3. With key ON (engine off) and HVAC commanding valve, backprobe the valve connector. Observe voltage on control and supply terminals using a DMM or scope while commanding the valve ON and OFF.
  4. If circuit reads higher-than-expected (stays at battery voltage when it should be low), check for short to B+ between the control output and battery using an ohmmeter with power removed. Isolate sections of harness to find short.
  5. Disconnect the valve and measure coil resistance to ground and between pins. If resistance is low/shorted or infinite/open compared to spec, replace the valve.
  6. If wiring and valve check OK, bench-test the valve by applying proper voltage through a fused jumper to verify operation (observe current draw).
  7. If bench test is good and harness shows no short, test the control module output for proper switching. If module output is stuck high and wiring is intact, consider module fault and consult manufacturer procedures before replacement.
  8. After repairs, clear codes and perform functional test and road test to confirm repair. Re-scan to ensure code does not return.

Likely causes

  • Connector at refrigerant distribution valve B is corroded or pins are bent
  • Power feed touching chassis or other circuits (short to B+)
  • Valve coil internal short or mechanical seizure
  • Aftermarket wiring or recent service damage to harness near valve
  • Faulty module driver transistor (rare)

Fault status

⚠️ Status
Control module reports a high voltage condition on the A/C refrigerant distribution valve B control circuit. Likely causes include a short to battery, damaged connector/wiring, or a faulty valve. Further testing of wiring, connector, and valve is required.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5 - 2.0 hours

Similar codes

P0EE4 P0EE6 P0EE7
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