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 MANUALSVOLVO2004S80 L6-2.9L TURBO VIN 91 B6294TREPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONMANUFACTURER CODE CHARTSTCM CODES (TRANSMISSION CONTROL MODULE)TCM-0016CONTROL MODULE. INTERNAL FAULT. PERMANENT FAULTINTERNAL FAULT. PERMANENT FAULT
2004 Volvo S80 L6-2.9L Turbo VIN 91 B6294T
Internal Fault. Permanent Fault
2004 Volvo S80 L6-2.9L Turbo VIN 91 B6294TSECTION Internal Fault. Permanent Fault
Internal fault. Permanent fault
Checking shift solenoids S1 and S2
- Ignition on.
- Gear selector in position P.
- Activate solenoids S1 and S2 individually.
The values should change between OFF and ON.
Do the values change?
Yes - FAULT-TRACING FAILED
No - Replacing the control module and programming
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Replacing the control module and programming
Caution! A new control module is delivered without software. The control module must be programmed in order to function after replacement.
For further information about programming and replacing the control module, see Transmission control module (TCM), replacing, B5254T2, AW50/51 AWD, B5254T2, AW55-50/51SN Service and Repair.
Continue - DONE
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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.