General Motors announced an official vehicle service campaign for its Chevrolet Volt extended-range electric car on Friday after it discovered that certain 2012 and 2013 model year cars may have incorrectly-filled battery cooling systems.
As GreenCarReports reports, air bubbles may have entered the battery cooling system during the car’s manufacturing process, causing the cooling system to be filled with a lower-than-normal quantity of coolant. While the air bubbles will have now worked their way out of the cooling system, the level of coolant in the cooling systems of affected Volts could be below recommended levels. Like air in any cooling or heating system, air in the Volt’s battery cooling system could result in sub-optimal cooling capabilities, resulting in higher than expected battery temperatures. In the case of the Volt, GM says a “Service High-Voltage Charging System” warning will present itself if the coolant level falls too much, triggering a Diagnostic Troubleshooting Code (DTC) in the process. If this happens, the car’s charger will fail to work until the system has been reset, work which requires an approved service centre to add the correct level of battery coolant, pressure-test the system and clear the DTC fault. While not an official recall, GM is asking customers of affected cars to make appointments at their local dealers to check the cars for free. Owners can check to see if their car is affected by contacting their local dealer and giving their car’s Vehicle Identification Number (VIN) number. Alternatively, you can call GM in the U.S. for free on 1-800-222-1020, quoting “14114, RESS Battery Coolant Level Low,” along with your car’s VIN to see if it is affected.
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