OM121 is one small size universal OBD code reader, which used to check engine system on all cars with OBDII standard. It provides DIYers and car owners with a convenient tool for reading and erasing fault codes fast. Compared with the other similar products at home and abroad, humanization design buttons and interfaces upgrade the comfort of operation, the price and function with competitive advantage.

Product Function

1.Easily determines the cause of the “Check Engine Light ( MIL)”
2.Reads hard(memory)/pending(intermittent) and historic codes and show definitions
3.Turns off Check Engine Light (MIL), clears codes and resets monitors
4.I/M monitor readiness test
5. Retrieves vehicle information (VIN, CIN and CVN)

Product Features

  • Easy to use— three Buttons.
  • Plug and Play— No batteries needed-powered via detachable OBD II cable.
  • Custom Languages—(English, French, Germany,Spanish)
  • General Standard Socket—Easy to use with one plug-in-16-pin OBDII Standard Socket.
  • CE, FCC and RoHS.

Range of Diagnose

1. OM121 works on most after 1996 OBD II compliant US, European and Asian vehicles.
2. OM121 supports ALL OBD II protocols: CAN, J1850 PWM, J1850 VPW, ISO9141 and KWP2000.


Display: Back-lit, 128 × 32 pixel display with contrast adjustment
Operating Temperature: 0 to 60°C (32 to 140 F°)
Storage Temperature: -20 to 70°C (-4 to 158 F°)
External Power: 8.0 to 18.0 V power provided via vehicle battery
Length Width Height
108 mm (4.25") 74mm (2.91") 20 mm (0.79")
Weight: NW: 0.195kg (0.57lb), GW: 0.30kg (0.77lb)