Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSVOLVO2007XC90 AWD V8-4.4L VIN 85 B8444SREPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONMANUFACTURER CODE CHARTSPSM CODES (POWER SEAT MODULE)PSM-0001INTERMITTENT FAULTDIAGNOSTIC TROUBLE CODE (DTC) INFORMATION
2007 Volvo XC90 AWD V8-4.4L VIN 85 B8444S
Diagnostic Trouble Code (DTC) Information
2007 Volvo XC90 AWD V8-4.4L VIN 85 B8444SSECTION Diagnostic Trouble Code (DTC) Information
Diagnostic trouble code (DTC) information
Condition
Motor 1 controls the seat front-rear adjustment. Motor 1 must be activated before the diagnostic trouble code (DTC) can be detected. Diagnostic trouble code (DTC) PSM-0001 is stored if no Hall sensor pulse is detected when motor 1 is activated and in operation.
Possible source
- Defective Hall sensor in motor 1.
- Short-circuit to supply voltage or ground in the signal cable.
- Open-circuit in the signal cable to the Hall sensor.
Fault symptom[s]
- Automatic seat control does not function (automatic control of other motors functioning as normal).
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.