VOLVO
TCM-00A0 - Power supply. Voltage too low
System
Transmission Control Module (TCM)
Volvo models this fault code applies to
Applies to the following models:
4 modelsS60 (2001–2009), V70 (2000–2008), V70 XC / XC70 (2001–2007), XC90 (2003–)
Show models by year and engine (9)
- Volvo S60 (2001–2009)2006–2007Engine B5254T4, D5244T4, D5244T5 only · Transmission TF-80SC, TF-80SC AWD only
- Volvo S60 (2001–2009)2008–2009Engine D5244T4, D5244T5 only · Transmission TF-80SC only
- Volvo V70 (2000–2008)2006–2007Engine B5254T4, D5244T4, D5244T5 only · Transmission TF-80SC, TF-80SC AWD only
- Volvo V70 (2000–2008)2008Engine D5244T5 only · Transmission TF-80SC only
- Volvo V70 XC / XC70 (2001–2007)2006–2007Engine D5244T4 only · Transmission TF-80SC AWD only
- Volvo XC90 (2003–)2006–2007Engine D5244T4 only · Transmission TF-80SC AWD only
- Volvo XC90 (2003–)2008–2010Engine D5244T4, D5244T5 only · Transmission TF-80SC AWD only
- Volvo XC90 (2003–)2011Engine D5244T18, D5244T4, D5244T5 only · Transmission TF-80SC, TF-80SC AWD only
- Volvo XC90 (2003–)2012All engines except: B5254T2, B6324S5 · All transmissions except: AW50/51 AWD
What does this fault code mean?
The transmission control module compares its power supply with a voltage value that the central electronic module (CEM) sends on the CAN network. The fault means the voltage is too low for the control module's function to be guaranteed.
Possible causes
- Battery voltage too low
- Contact resistance or oxidation in the connector to the control module or the transmission
- Internal fault inside the transmission control unit (TCM)
What you can do
- 1Read off and clear the fault code, road test the car and check whether it comes back
- 2Check the battery condition and charge; a weak battery can cause too low a voltage
- 3Check the connectors to the transmission control module for contact resistance and oxidation
- 4Have a diagnostic tool? Read the voltage for the transmission control module and for the central electronic module in live data; the two values should be roughly equal
Symptoms you may notice2
- Malfunction indicator lamp (MIL) on
- General warning lamp on
What the fault can affect1
- The Emergency mode 1 program is activated
General guidance for car owners. Diagnosis on the car can point to a different cause.