Should the engine mangement light come on, you can read most issues through the OBD port using a suitable code reader. More information can be found on the relevant pages for your particular smart: fortwo 450, fortwo 451 and Roadster. Should your code reader simply give you a fault code, please use this system to look up the description, possible cause and resolution where available.
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OBD Codes
| Name | Description | |
|---|---|---|
| P0703 |
Torque Converter/Brake Switch B Circuit Malfunction |
|
| P0704 |
Clutch Switch Input Circuit Malfunction |
|
| P0705 |
Transmission Range Sensor Circuit malfunction (PRNDL Input) |
|
| P0706 |
Transmission Range Sensor Circuit Range/Performance |
|
| P0707 |
Transmission Range Sensor Circuit Low Input |
|
| P0708 |
Transmission Range Sensor Circuit High Input |
|
| P0709 |
Transmission Range Sensor Circuit Intermittent |
|
| P0710 |
Transmission Fluid Temperature Sensor Circuit Malfunction |
|
| P0711 |
Transmission Fluid Temperature Sensor Circuit Range/Performance |
|
| P0712 |
Transmission Fluid Temperature Sensor Circuit Low Input |
|
| P0713 |
Transmission Fluid Temperature Sensor Circuit High Input |
|
| P0714 |
Transmission Fluid Temperature Sensor Circuit Intermittent |
|
| P0715 |
Input/Turbine Speed Sensor Circuit Malfunction |
|
| P0716 |
Input/Turbine Speed Sensor Circuit Range/Performance |
|
| P0717 |
Input/Turbine Speed Sensor Circuit No Signal |
|
| P0718 |
Input/Turbine Speed Sensor Circuit Intermittent |
|
| P0719 |
Torque Converter/Brake Switch B Circuit Low |
|
| P0720 |
Output Speed Sensor Circuit Malfunction |
|
| P0721 |
Output Speed Sensor Range/Performance |
|
| P0722 |
Output Speed Sensor No Signal |
|
| P0723 |
Output Speed Sensor Intermittent |
|
| P0724 |
Torque Converter/Brake Switch B Circuit High |
|
| P0725 |
Engine Speed input Circuit Malfunction |
|
| P0726 |
Engine Speed Input Circuit Range/Performance |
|
| P0727 |
Engine Speed Input Circuit No Signal |
|
| P0728 |
Engine Speed Input Circuit Intermittent |
|
| P0730 |
Incorrect Gear Ratio |
|
| P0731 |
Gear 1 Incorrect ratio |
|
| P0732 |
Gear 2 Incorrect ratio |
|
| P0733 |
Gear 3 Incorrect ratio |
