The P0553 code on your 2021 Kia Sorento indicates a high voltage condition in the power steering pressure sensor circuit, suggesting an open circuit condition.
High Circuit Interpretation
High voltage in a sensor circuit typically means the signal wire is open—disconnected or broken. Without the sensor completing the circuit, the ECM sees reference voltage with no signal load.
Sorento Steering System
The 2021 Kia Sorento uses electric power steering (MDPS), which doesn't require a hydraulic pressure sensor. P0553 appearing on this vehicle may indicate a different issue or scan tool interpretation error.
Verifying the Code
Use Kia KDS diagnostics for accurate code reading. The system will show Kia-specific codes and descriptions. If the code truly relates to a non-existent pressure sensor, there may be a wiring or module issue causing erroneous code storage.
Diagnostic Process
Verify your Sorento's steering type—2021 models use electric. Use KDS to read the actual stored fault. If an open circuit exists in any steering-related sensor, trace and repair. Check for damaged wiring in the steering column area. Verify no aftermarket installations created wiring issues.