MULTIPLEX COMMUNICATION SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION

DTC Code	Description
B1200	MPX Body ECU Stop
B1201	Mayday ECU Communication Stop
B1210	Power ECU Stop
B1204	Driver Side Seat Switch ECU Communication Stop
B1205	AFS ECU Communication Stop
B1206	P/W Master Switch Communication Stop
B1207	Smart ECU Stop
B1211	Driver Door ECU Communication Stop
B1212	Front Passenger Door ECU Communication Stop
B1213	Tilt and Telescopic ECU Communication Stop
B1214	Short to B+ in Door System Communication Bus Malfunction
B1215	Short to GND in Door System Communication Bus Malfunction
B1216	Rear Door ECU RH Communication Stop
B1217	Rear Door ECU LH Communication Stop
B1247	Tire Pressure Monitor Receiver Communication Stop
B1262	A/C ECU Communication Stop
B1263	Luggage Room Junction Block ECU Communication Stop
B1266	Short to B+ in Instrument Panel System Communication Bus Malfunction
B1267	Short to GND in Instrument Panel System Communication Bus Malfunction
B1271	Combination Meter ECU Communication Stop
B1272	Power Seat ECU Communication Stop
B1273	Sliding Roof ECU Communication Stop
B1278	Combination Switch ECU Communication Stop
B1279	Rain Sensor Communication Stop
B1280	Left Side Junction Block ECU Communication Stop
B1281	Airbag ECU Communication Stop
B1289	Passenger Seat ECU Communication Stop
B1291	Short to B+ in Light System Communication Bus Malfunction
B1292	Short to GND in Light System Communication Bus Malfunction
B1296	Front Light ECU Communication Stop
B1297	Clearance Sonar ECU Communication Stop

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Multiplex Communication System