HVAC DTCS: 1999-2000
C280, C43 CLIMATE CONTROL DIAGNOSTIC TROUBLE CODE LIST
| DTC | Possible Cause |
|---|---|
| DTC B1226 | In-Vehicle Temperature Sensor |
| B1227 | Outside Temperature Sensor See DTC B1422: SERIAL INTERFACE (K1) |
| DTC B1228 | Left Heater Core Temperature Sensor |
| DTC B1229 | Right Heater Core Temperature Sensor |
| DTC B1230 | Evaporator Temperature Sensor |
| B1231 | Engine Coolant Temperature Sensor See DTC B1422: SERIAL INTERFACE (K1) |
| DTC B1232 | Refrigerant Pressure Sensor |
| DTC B1416 | Coolant Circulation Pump |
| DTC B1417 | Left-Side Water (Heater) Valve |
| DTC B1418 | Right-Side Water (Heater) Valve |
| DTC B1419 | A/C Compressor Clutch |
| DTC B1420 | Idle Speed Regulator |
| DTC B1421 | Auxiliary Fan Activation |
| DTC B1422 | Serial Interface (K1) |
| DTC B1454 | Fresh/Recirculate Switchover Valve |
| DTC B1459 | Serial Interface (K2) |