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.
SYS.OK|MANUAL.DB● LIVE
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-0008DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION4T65EV TRANSMISSION
2004 Volvo S80 L6-2.9L Turbo VIN 91 B6294T
4T65EV Transmission
2004 Volvo S80 L6-2.9L Turbo VIN 91 B6294TSECTION 4T65EV Transmission
Diagnostic trouble code (DTC) information
Condition
Shift solenoids S2 and S1 operate in tandem to control gear-shifting. The solenoids are controlled by power stages in the transmission control module (TCM). The transmission control module (TCM) opens the power stages to activate the solenoids and sends a voltage through the circuit. Solenoid S2 is activated in 1st and 2nd gears. Diagnostic trouble code (DTC) TCM-0008 is stored if the control module registers an open-circuit in the solenoid S2 circuit when the solenoid is activated.
Substitute value
- The control module "Limp Home" program has been initiated.
Possible source
- Contact resistance in the terminals.
- Open-circuit in the signal cable.
- Defective solenoid.
Fault symptom[s]
- General orange warning lamp lit.
- Malfunction indicator lamp (MIL) lit.
- No lock-up function.
- No shifting.
- Harsh gear shifting.
Hint: Harsh shifting - due to disabled line pressure solenoid STH control. This results in constant maximum line pressure and leads to harsher shifting and gear engagement.
No shifting -because the transmission control module (TCM) prevents activation of the solenoids. This stops gear-shifting.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.