P27EE

Exhaust Gas Recirculation Position Sensor A Circuit Range/Performance

P27EE is a generic OBD-II powertrain diagnostic trouble code: Exhaust Gas Recirculation Position Sensor A Circuit Range/Performance. It is logged by the engine control unit when the powertrain monitor detects that a specific fault threshold has been exceeded — typically resulting in the malfunction-indicator lamp (MIL / check-engine light) being illuminated.

Code
P27EE
Group
Powertrain
System
Powertrain
Severity
Warning (MIL on)
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What P27EE means

P27EE is stored when the powertrain control module (PCM) detects that the signal from the EGR valve position sensor A is within an acceptable voltage range but does not correlate with the commanded valve position or the expected flow response. The code distinguishes a range/performance fault from a simple open or short circuit failure.

The EGR system reduces oxides of nitrogen (NOx) by recirculating a metered portion of exhaust gas back into the intake manifold to lower peak combustion temperatures. Accurate position feedback is essential so the PCM can close a real-time control loop. When the reported position deviates from the commanded target by more than the calibrated threshold, or when the valve sticks and cannot follow the commanded travel, this fault is set.

Common root causes include carbon buildup restricting valve travel, a worn or contaminated position sensor, or mechanical wear in the EGR actuator. Diagnosis should begin with live data observation of actual versus commanded EGR position before any parts are replaced.

Common causes

Most-frequently reported root causes when P27EE is logged.

  • 1
    Excessive carbon deposits on the EGR valve pintle restricting free movement.
  • 2
    Worn or contaminated EGR valve position sensor A providing inaccurate feedback.
  • 3
    EGR valve actuator (electric motor or solenoid) mechanically sticking or binding.
  • 4
    Vacuum leak in the EGR control circuit on vacuum-operated systems.
  • 5
    Wiring harness damage or poor connector contact at the EGR position sensor.
  • 6
    PCM calibration mismatch following an incomplete software update.
  • 7
    Excessive back-pressure from a partially blocked exhaust or catalytic converter.

Symptoms drivers notice

Malfunction indicator lamp (MIL) illuminated.
Elevated NOx emissions causing potential emissions test failure.
Rough idle or hesitation during light throttle operation.
Slight reduction in fuel economy due to non-optimal combustion control.
Possible increase in engine smoke under certain load conditions.

How to diagnose P27EE

A typical diagnostic flow when this code is present.

  1. 1
    Connect a scan tool and record all stored and pending DTCs before clearing anything.
  2. 2
    Check live data for EGR commanded position versus actual reported position at idle and under light load.
  3. 3
    Inspect the EGR valve and inlet passage for carbon buildup; clean if significantly restricted.
  4. 4
    Verify EGR position sensor reference voltage, signal, and ground at the connector with a multimeter.
  5. 5
    Check wiring continuity and insulation integrity between the EGR sensor and PCM.
  6. 6
    Command the EGR valve to various positions using bi-directional scan tool control and observe response.
  7. 7
    If mechanical binding is confirmed after cleaning, replace the EGR valve assembly and retest.

Vehicles where we've handled P27EE

Platforms in our catalogue with confirmed P27EE coverage.

BMW 320D
2016

Related powertrain codes

Frequently asked questions

Can I drive with P27EE active?

Short trips are generally tolerable, but prolonged driving accelerates carbon buildup and may worsen NOx emissions. Repair as soon as practical.

Will cleaning the EGR valve clear this code?

If carbon deposits were restricting travel, cleaning often resolves the fault. After cleaning, clear the code and complete a full drive cycle to confirm.

Is P27EE the same as P0401?

No. P0401 indicates insufficient EGR flow detected via a delta pressure or MAP sensor, while P27EE is specifically a position sensor range or performance fault on sensor circuit A.

Does P27EE always require EGR valve replacement?

Not always. Many cases are resolved by thorough cleaning or by repairing wiring faults. Replace the valve only after ruling out carbon restriction and circuit issues.

Disabling P27EE in software

RaceTune can permanently disable P27EE — and any other OBD-II diagnostic trouble code — on every ECU family we support. The monitor is disabled inside the ECU itself, so the fault stops being logged: the warning light stays off and the engine never enters limp mode for this code. The change is tied to your exact software version.

Permanent
The monitor is disabled in the ECU itself — not just cleared. It cannot return.
Tailored to your file
Each patch is matched to your specific software version — never a one-size-fits-all file.
Reversible
The original file is always preserved. Reflash the stock to return the ECU to factory state.

ECUs with a P27EE disable in our catalogue

Confirmed coverage from our recipe database — we support many more families. Upload your file and our identifier will match it automatically.

  • Bosch EDC17C50 verified 1 software version

Software modifications affect emissions compliance and are not road-legal in many jurisdictions. RaceTune service files are intended for motorsport, off-road, and export use.

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