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C2120 - TPM System Malfunction (No Sensor Received)
It sounds like the TPMS has gone south on you. Has it been working in the past? You might want to try retraining the sensors first to see if you can get a response. It's unusual for all of the snesors to quit at the same time, so the receiver may be on the fritz. Does your keyless remote work? They use the same receiver...