Diagnostic Overview
Volvo fault code P0243-13 is commonly associated with turbocharger wastegate or boost-control solenoid circuit performance, depending on engine configuration. On Volvo heavy-duty applications it should be interpreted through the exact Tech Tool description because turbo control strategy varies by engine and year. The practical concern is that boost control is not responding correctly.
Likely Causes
Boost-control solenoid or actuator issue; wiring fault; connector corrosion; sticking turbo mechanism; pressure sensor error; boost or exhaust leak.
What To Check First
Verify exact OEM definition, test the turbo control circuit, inspect actuator/solenoid wiring, compare boost command to actual boost, and check for leaks.