Common Symptoms
- Check engine light illuminated
- Reduced engine power or boost pressure
- Poor acceleration or sluggish throttle response
- Limp mode activation
- Unusual turbocharger noises or wastegate operation
- Higher than normal exhaust gas temperatures
Most Likely Root Causes
- Faulty turbocharger boost control position sensor
- Damaged or corroded wiring harness to boost control sensor
- Poor electrical connection at sensor connector
- Failed turbocharger wastegate actuator or control solenoid
- ECM internal fault or software issue
Full step-by-step tests, DVOM guidance, and pinout data are available inside the AI Diesel Tech diagnostic session.
AI walks you through every test — one step at a time. Plans start at $12.95/mo.
Component Location
The turbocharger boost control position sensor is typically mounted on the turbocharger wastegate actuator assembly or integrated into the variable geometry turbo mechanism.
Manufacturer Notes
Some turbocharged engines use variable geometry turbochargers with integrated position sensors that require specialized scan tool access for proper diagnosis.
Also diagnosing J1939 SPN/FMI codes?
Heavy-duty trucks often throw both OBD-II and J1939 faults simultaneously. AI Diesel Tech handles both protocols in a single guided session.
AI Diesel Tech — The Technician's Diagnostic Engine
AI Diesel Tech diagnostic logic is built by an ASE Certified Diesel Technician. Professional-grade OBD-II and J1939 fault analysis — trusted by technicians nationwide, used in shops, fleets, and training programs.
Get AI-Guided Diagnosis for P2564
The diagnostic engine walks you through every physical test — step by step, on your phone, at the truck.