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 MANUALSVOLVO2004V70 L5-2.5L TURBO VIN 59 B5254T2REPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONMANUFACTURER CODE CHARTSTCM CODES (TRANSMISSION CONTROL MODULE)TCM-012CDIAGNOSTIC TROUBLE CODE (DTC) INFORMATION
2004 Volvo V70 L5-2.5L Turbo VIN 59 B5254T2
Diagnostic Trouble Code (DTC) Information
2004 Volvo V70 L5-2.5L Turbo VIN 59 B5254T2SECTION Diagnostic Trouble Code (DTC) Information
Diagnostic trouble code (DTC) information
Condition
The driving section of the transmission is disengaged when certain conditions are met:
- Stationary
- Engine idling
- Stop pedal depressed
- Gear position D, 3 or 4.
The function decreases fuel consumption and vibration from the transmission when running the engine at idle speed.
Diagnostic trouble code (DTC) TCM-012C is stored if the transmission control module (TCM) registers that the engine is juddering or running unevenly when engaging clutch C1.
Substitute value
- The transmission control module (TCM) "Emergency mode I" program has been initiated.
Possible source
- Solenoid SLS jammed in the ON position
- Internal fault in the transmission
- Internal fault in the control module.
Fault symptom[s]
- General orange warning lamp lit
- The engine speed (RPM) oscillates
- No lock-up function
- Malfunction indicator lamp (MIL) lit.
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.