P22D1

Code

LAND ROVER P — Powertrain

turbo compressor turbine control valve inlet system - high

Brand: LAND ROVER

Type: P — Powertrain

Views: UK: 16 EN: 32 RU: 23

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Page language: EN

Causes

Open or shorted wiring (short to battery voltage) in inlet valve circuit
Corroded, loose or damaged connector at the inlet control valve
Failed turbo compressor turbine inlet control valve (stuck or internal short)
Faulty ECU/PCM driver for the inlet control valve
Blown or intermittent fuse / relay supplying the valve circuit
Mechanical blockage or seized inlet valve preventing normal movement

Symptoms

Reduced engine power or poor turbo response
Engine may enter limp mode / reduced power strategy
Hesitation or poor acceleration under boost demand
Overboost or underboost conditions depending on valve behavior
Check Engine Light (MIL) set with P22D1 stored
Possible black smoke under heavy load (incomplete combustion)

What to check

Read and record freeze‑frame and stored DTCs with a capable scan tool
Confirm battery voltage is within specification during cranking and while running (typically ~12.0–14.5 V)
Perform visual inspection of inlet valve, connector and wiring for corrosion, heat damage, chafing or pinched wires
Check related fuses and relays for the turbo/inlet control circuit
With connector disconnected, inspect pins for corrosion, bent pins or contamination
Clear code and re-run to check for reoccurrence and freeze frame context

Signal parameters

Supply voltage to valve: ~11–14.5 V (key ON / engine running)
Ground: near 0 V when measured correctly
Control signal from ECU: PWM duty cycle 0–100% (frequency commonly 50–500 Hz depending on manufacturer)
Typical solenoid coil resistance (example range): 2–30 ohms — consult specific Land Rover spec for exact value
When commanded off: control circuit should be low/close to 0 V; a steady high (~battery voltage) indicates a short-to-B+ or stuck driver

Diagnostic algorithm

Obtain full vehicle history, freeze frame data and note conditions when fault set (engine load, rpm, temperature)
Perform a visual inspection of turbo inlet control valve, connector and wiring for damage, heat exposure or corrosion; repair obvious damage
Check fuses/relays for the turbo/inlet valve circuit and replace if faulty
With ignition OFF, disconnect inlet valve connector. Inspect pins and measure resistance of the valve solenoid between its terminals; compare to manufacturer spec (if outside spec, replace the valve)
With connector disconnected, check for short to B+ and short to ground on the harness: measure between control pin and battery positive (should not be a direct short); measure between control pin and ground (should not be short if circuit expected open)
Reconnect and backprobe the control connector with engine running or with scan tool commanding the valve: measure supply voltage, ground reference and control PWM signal; verify values against expected signal parameters
If wiring appears intact but control signal is abnormal at the connector while correct at the ECU connector, suspect wiring/harness; if abnormal at ECU connector, suspect ECU driver fault and follow manufacturer procedures for ECU testing/replacement
If valve is electrically good but mechanically sticking, remove and bench test actuator or replace the valve assembly; ensure engine cooled and safe to work on turbo components
After repair or replacement, clear codes and perform road test under conditions similar to when fault occurred to confirm repair success

Likely causes

Connector corrosion or pin pushed out at the inlet valve harness
Short to B+ on the valve control wire due to chafing near the turbo
Failed inlet control valve solenoid coil (internal short/high impedance)
Damaged or melted wiring from excessive heat in turbo area
Failed ECU/driver (less common)

Fault status

⚠️ Status

Turbo compressor turbine control valve inlet system circuit voltage high (P22D1).

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-2.5 hours

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P22D1 — turbo compressor turbine control valve inlet system - high