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Home >> Jaguar >> 1993 >> XJS 2D Convertible, Standard >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Brake System >> Diagnosis >> High Priority Abs Codes >> Code 21
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Code 21

Main valve failure. Failure can be caused by a defective valve, wiring harness or faulty power transistor in ABS ECU. Check solenoid valve terminals for short or open circuit.