P22D5 code meaning
Turbocharger Turbine Inlet Valve Position Sensor Circuit Range/Performance
Powertrain system Generic code P22xx codes Check engine light
What P22D5 means
P22D5 is a plausibility fault of the turbine inlet valve position signal. The voltage stays inside its electrical limits, yet it does not match what the module expects, for instance the reading lags the commanded position, fails to reach the learned end stops or does not change when the valve is moved. CARB requires input sensors of this kind to be checked for rationality as well as for circuit faults. Since a GM patent describes the valve being run in position control with sensor feedback, a wrong but believable reading directly corrupts the valve setting and thus boost. Causes include a sensor drifting with heat, a slipped magnet or linkage, and a valve that moves sluggishly so that position and command diverge. No manufacturer publicly documents P22D5.
P22D5 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 4 hours
- Clears after repairAfter a drive cycle
Symptoms of P22D5
- Check engine light on
- Jerky or delayed changeover between turbo stages
- Boost fluctuates under steady throttle
Common causes of P22D5
- Most likelyValve or linkage sluggish from soot, so position lags the command
- PossiblePosition sensor drifting or misaligned on the actuator
- Less likelyEnd positions not relearned after actuator replacement
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Turbine inlet valve
What each part of P22D5 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 2 | Area: fuel and air metering (injector circuit). |
| D5 | The exact fault in that area. |
What to do next
- Note P22D5 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P22D5
What does P22D5 mean?
P22D5 means "Turbocharger Turbine Inlet Valve Position Sensor Circuit Range/Performance". P22D5 is a plausibility fault of the turbine inlet valve position signal. It is a generic code, so it means the same on every make.
Is it safe to drive with P22D5?
Drive gently and only to a workshop. With P22D5 the car can go into limp mode (reduced power) to protect itself.
Will P22D5 fail an emissions test?
Yes, it can. P22D5 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P22D5 to fix?
Difficulty: medium. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will P22D5 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.