How to resolve fault code 00256 in Audi A6L?

1 Answers
DiSamuel
07/29/25 7:50pm
Step 1: Check for refrigerant leaks at the air conditioning pipeline joints and valve cores, which may cause insufficient pressure. Inspect the high and low pressure switches. If the protection mechanism is activated, the switches will cut off the power supply, resulting in no signal when reading the fault code, and the compressor will stop working. Troubleshoot and fix the issue. After replenishing the refrigerant to reach the appropriate pressure, the pressure switch will automatically engage, and the fault code will disappear.
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