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Home / DTC / P22D5 — Turbocharger Turbine Inlet Valve Position Sensor Circuit Range/Performance

P22D5 — Turbocharger Turbine Inlet Valve Position Sensor Circuit Range/Performance

Detailed page for trouble code P22D5.

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P22D5

Generic P — Powertrain

Turbocharger Turbine Inlet Valve Position Sensor Circuit Range/Performance

Brand: Generic
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Damaged or corroded sensor connector or wiring (open, short to power/ground, high resistance)
  • Failed turbine inlet valve position sensor (hall, potentiometer, or encoder)
  • Sticking or mechanically binding turbine inlet valve or actuator
  • Faulty actuator (vacuum, electric motor, or solenoid) preventing commanded movement
  • Poor sensor reference/ground or intermittent supply voltage (5 V reference)
  • Incorrect calibration, software bug, or ECM internal fault

Symptoms

  • Malfunction Indicator Lamp (MIL/Check Engine) illuminated
  • Reduced engine power or activation of limp-home/derate mode
  • Incorrect boost control: underboost or overboost events
  • Surging or poor acceleration around boost onset
  • Erratic turbo vane/wastegate movement audible or visible (if accessible)
  • Poor fuel economy

What to check

  • Read and record P22D5 and any other stored codes and freeze-frame data
  • Capture live data: turbine inlet valve position sensor value, commanded position, boost/boost target, wastegate/actuator command
  • Visually inspect sensor connector and wiring for heat damage, corrosion, or chafe marks
  • Check for other turbo-related codes (boost control, actuator faults) that appear simultaneously
  • Confirm battery voltage and good ground at ECM and sensor connector
  • Perform basic mechanical check of turbine inlet valve/actuator movement (with engine off and cooled)

Signal parameters

  • Typical sensor signal: 0.1–4.9 V analog range (0–5 V reference) or 0–100% duty cycle for PWM-style position sensors
  • Reference supply: stable 5 V ±5% from ECM
  • Ground: near 0 V; no more than a few hundred millivolts under load
  • When commanded open/closed, signal should move smoothly without steps, jumps, or dropouts
  • Scan-tool position counts typically 0–255 or 0–100% corresponding to physical travel

Diagnostic algorithm

  1. Verify the code and note freeze-frame and related DTCs. Do not replace parts yet.
  2. With key ON engine OFF, inspect connector and wiring for damage, corrosion, or heat melt. Repair visible issues.
  3. Using a scan tool, observe live sensor value and commanded position while commanding the valve (if tool supports). Note whether sensor follows commanded changes smoothly.
  4. Backprobe connector: verify 5 V reference present, ground continuity to chassis and ECM, and signal voltage changes when commanding actuator. Use oscilloscope if available to check waveform for noise/jumps.
  5. Perform wiggle test on wiring with live data: look for intermittent changes or dropouts indicating broken strands or chafe.
  6. Measure sensor resistance (if applicable) and compare to manufacturer spec; check for short to power/ground/other circuits.

Likely causes

  • Wiring harness chafed at turbo heat shield causing intermittent short to ground
  • Connector corrosion allowing high resistance in signal/ground circuits
  • Sensor element (potentiometer/Hall/encoder) worn out producing jumpy or out-of-range voltages
  • Actuator seized by carbon/oil causing sensor to report position inconsistent with commanded duty
  • Blown 5 V reference fuse or poor ECM ground

Fault status

⚠️ Status
Control module detected turbine inlet valve position sensor signal outside expected range or inconsistent with commanded position (range/performance).
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours
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Code

P22D5

LAND ROVER P — Powertrain

Circuit of the intake valve position sensor turbocharger turbine Range / performance

Brand: LAND ROVER
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Damaged or corroded sensor connector or wiring (open, short to power/ground, high resistance)
  • Failed turbine inlet valve position sensor (hall, potentiometer, or encoder)
  • Sticking or mechanically binding turbine inlet valve or actuator
  • Faulty actuator (vacuum, electric motor, or solenoid) preventing commanded movement
  • Poor sensor reference/ground or intermittent supply voltage (5 V reference)
  • Incorrect calibration, software bug, or ECM internal fault

Symptoms

  • Malfunction Indicator Lamp (MIL/Check Engine) illuminated
  • Reduced engine power or activation of limp-home/derate mode
  • Incorrect boost control: underboost or overboost events
  • Surging or poor acceleration around boost onset
  • Erratic turbo vane/wastegate movement audible or visible (if accessible)
  • Poor fuel economy

What to check

  • Read and record P22D5 and any other stored codes and freeze-frame data
  • Capture live data: turbine inlet valve position sensor value, commanded position, boost/boost target, wastegate/actuator command
  • Visually inspect sensor connector and wiring for heat damage, corrosion, or chafe marks
  • Check for other turbo-related codes (boost control, actuator faults) that appear simultaneously
  • Confirm battery voltage and good ground at ECM and sensor connector
  • Perform basic mechanical check of turbine inlet valve/actuator movement (with engine off and cooled)

Signal parameters

  • Typical sensor signal: 0.1–4.9 V analog range (0–5 V reference) or 0–100% duty cycle for PWM-style position sensors
  • Reference supply: stable 5 V ±5% from ECM
  • Ground: near 0 V; no more than a few hundred millivolts under load
  • When commanded open/closed, signal should move smoothly without steps, jumps, or dropouts
  • Scan-tool position counts typically 0–255 or 0–100% corresponding to physical travel

Diagnostic algorithm

  1. Verify the code and note freeze-frame and related DTCs. Do not replace parts yet.
  2. With key ON engine OFF, inspect connector and wiring for damage, corrosion, or heat melt. Repair visible issues.
  3. Using a scan tool, observe live sensor value and commanded position while commanding the valve (if tool supports). Note whether sensor follows commanded changes smoothly.
  4. Backprobe connector: verify 5 V reference present, ground continuity to chassis and ECM, and signal voltage changes when commanding actuator. Use oscilloscope if available to check waveform for noise/jumps.
  5. Perform wiggle test on wiring with live data: look for intermittent changes or dropouts indicating broken strands or chafe.
  6. Measure sensor resistance (if applicable) and compare to manufacturer spec; check for short to power/ground/other circuits.

Likely causes

  • Wiring harness chafed at turbo heat shield causing intermittent short to ground
  • Connector corrosion allowing high resistance in signal/ground circuits
  • Sensor element (potentiometer/Hall/encoder) worn out producing jumpy or out-of-range voltages
  • Actuator seized by carbon/oil causing sensor to report position inconsistent with commanded duty
  • Blown 5 V reference fuse or poor ECM ground

Fault status

⚠️ Status
Control module detected turbine inlet valve position sensor signal outside expected range or inconsistent with commanded position (range/performance).
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours
320

Browse 320 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LAND ROVER

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