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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.

Please use this system to look up OEM smart part numbers. Each code was correct at the time of adding. However, we cannot be responsible for any parts that have become obselete or removed by smart. Should you spot any mistakes, please let us know via the contact us system.

If you are looking for a particular part number, please contact us with your VIN and as much detail as you can. We will look up the part number and get back to you. :)

  Name Description Part Number:
P0132

O2 Sensor Circuit High Voltage (Bank 1 Sensor 1)

P0133

O2 Sensor Circuit Slow Response (Bank 1 Sensor 1)

P0134

O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1)

P0135

O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)

P0136

O2 Sensor Circuit Malfunction (Bank 1 Sensor 2)

P0137

O2 Sensor Circuit Low Voltage (Bank 1 Sensor 2)

P0138

O2 Sensor Circuit High Voltage (Bank 1 Sensor 2)

P0139

O2 Sensor Circuit Slow Response (Bank 1 Sensor 2)

P0140

O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 2)

P0141

O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)

P0142

O2 Sensor Circuit Malfunction (Bank 1 Sensor 3)

P0143

O2 Sensor Circuit Low Voltage (Bank 1 Sensor 3)

P0144

O2 Sensor Circuit High Voltage (Bank 1 Sensor 3)

P0145

O2 Sensor Circuit Slow Response (Bank 1 Sensor 3)

P0146

O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 3)

P0147

O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 3)

P0150

O2 Sensor Circuit Malfunction (Bank 2 Sensor 1)

P0151

O2 Sensor Circuit Low Voltage (Bank 2 Sensor 1)

P0152

O2 Sensor Circuit High Voltage (Bank 2 Sensor 1)

P0153

O2 Sensor Circuit Slow Response (Bank 2 Sensor 1)

P0154

O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 1)

P0155

O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)

P0156

O2 Sensor Circuit Malfunction (Bank 2 Sensor 2)

P0157

O2 Sensor Circuit Low Voltage (Bank 2 Sensor 2)

P0158

O2 Sensor Circuit High Voltage (Bank 2 Sensor 2)

P0159

O2 Sensor Circuit Slow Response (Bank 2 Sensor 2)

P0160

O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 2)

P0161

O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 2)

P0162

O2 Sensor Circuit Malfunction (Bank 2 Sensor 3)

P0163

O2 Sensor Circuit Low Voltage (Bank 2 Sensor 3)