VOLVO
OBC-U300316 - Battery Voltage. General Electrical Failures. Circuit voltage below threshold
System
On-board Charger (OBC)
Volvo models this fault code applies to
Applies to the following models:
1 modelV60 (2011–)
Show models by year and engine (2)
What does this fault code mean?
The battery charger control module (OBC) checks the voltage it runs on itself. The fault is set when an incorrect value lasts for a while. The fault can come from the voltage supply being short-circuited to ground, or from contact resistance and oxidation in the connections. Charging the high voltage battery is not possible while the fault remains.
Possible causes
- The voltage supply cable is short-circuited to ground
- Contact resistance or oxidation in the connections
What you can do
- 1Check that the fuses in the car are intact, and that the battery is in good condition with the battery terminals tight
- 2Have a workshop check that the connections to the charger are clean, tight and not oxidised
- 3Read out and erase the fault code, charge again and see whether it comes back
- 4Have a workshop check the voltage supply for a short circuit to ground. Do not work on the high voltage system yourself
Symptoms you may notice3
- Charging the high voltage battery from an external charging cable does not happen, is reduced or does not work correctly
- The LED on the charging cable or the charging socket shows a fault and charging is reduced
- A text message and a warning symbol are shown in the display
What the fault can affect1
- Charging the high voltage battery is not possible
General guidance for car owners. Diagnosis on the car can point to a different cause.