Faulty interstage pressure sensor A; Damaged or corroded wiring or connector at the sensor; Leaking or restricted interstage pressure hose or tube; Clogged or faulty interstage pressure sensor port; Failed turbocharger interstage control valve or actuator; PCM software issue or internal fault (less common)

DTC codes / P2Dxx · Hybrid propulsion / P2D22

P2D22Turbocharger Interstage Pressure Sensor A Circuit Range/Performance

P2D22 indicates that the powertrain control module (PCM) has detected an out-of-range or performance problem with the signal from the turbocharger interstage pressure sensor A circuit. This sensor measures pressure between the turbocharger compressor stages on a two-stage turbo system, and the PCM compares that signal against expected values under specific operating conditions to set this code.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaHybrid propulsion

Symptoms you may notice

Illumination of the check engine light, often with no other noticeable symptoms
Reduced engine power or limp mode during acceleration
Poor throttle response or sluggish turbo spool-up
Decreased fuel economy due to incorrect fuel delivery calculations
Rough running or hesitation under load
In rare cases, excessive black smoke from the exhaust if the engine runs rich

Common causes, most likely first

Faulty interstage pressure sensor A
Damaged or corroded wiring or connector at the sensor
Leaking or restricted interstage pressure hose or tube
Clogged or faulty interstage pressure sensor port
Failed turbocharger interstage control valve or actuator
PCM software issue or internal fault (less common)

How to diagnose and fix it

Perform a visual inspection of the sensor, wiring, and connectors for damage or corrosion
Check for technical service bulletins (TSBs) related to the code for your specific vehicle
Use a scan tool to verify live data from the interstage pressure sensor and compare to expected values
Inspect the interstage pressure hose and sensor port for leaks or blockages
Test the sensor circuit with a multimeter for proper voltage and continuity
Replace the interstage pressure sensor if testing indicates it is faulty
Repair or replace damaged wiring or connectors as needed, then clear codes and verify the repair

Interstage sensor faults often misdiagnosed

A leaking interstage charge air hose can mimic a sensor failure, so always pressure-test the system before replacing parts.
The interstage pressure sensor is often confused with the main boost pressure sensor, leading to replacement of the wrong component.
Corrosion inside the sensor connector pins is a common cause that is easily overlooked during visual inspection.
On some vehicles, a faulty interstage pressure sensor can cause the PCM to limit turbo boost, resulting in a noticeable power loss that may be mistaken for a turbo failure.
After repairs, a drive cycle with specific conditions may be required to relearn the sensor and clear the code permanently.

Can I keep driving with P2D22?

It is generally safe to drive with this code as long as the vehicle is not in limp mode and performance is not severely degraded, but avoid heavy acceleration or towing until the fault is repaired to prevent potential turbocharger damage.

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.