OBD-II Diagnostic Trouble Codes

U0121-00 – Lost Communication With Anti-lock Brake System (ABS) Control Module (Jeep Grand Cherokee)

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U0001-00 – CAN C Bus (Jeep Grand Cherokee)

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C2212-00 – ECU In – Plant Mode (Jeep Grand Cherokee)

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C220C-00 – Active Suspension Module Internal (Jeep Grand Cherokee)

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C212C-12 – Suspension Valve Power Supply Voltage – Circuit Short To Battery (Jeep Grand Cherokee)

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C212C-11 – Suspension Valve Power Supply Voltage – Circuit Short To Ground (Jeep Grand Cherokee)

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C212B-12 – Sensor Supply 3 Voltage – Circuit Short To Battery (Jeep Grand Cherokee)

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C212B-11 – Sensor Supply 3 Voltage – Circuit Short To Ground (Jeep Grand Cherokee)

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C2129-17 – Battery Voltage – Circuit Voltage Above Threshold (Jeep Grand Cherokee)

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C2129-16 – Battery Voltage – Circuit Voltage Below Threshold (Jeep Grand Cherokee)

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