OBDCheck 311A

Return Policy

  • 30-Day Money Back
  • One-Year hassle free replacement warranty against defect
  • Register and extend the warranty for another 6 months

Shipping Information

Delivery Estimate:
* USA & Canada: 2-4 business days (due to the COVID-19, there may be some delays).
* Europe: 6-10 business days (8-15 business days during COVID-19).
Most items can be shipped to United States, Canada, Europe and Australia. Please check ship-to countries below for each item. If your country is not listed, please go to amazon.com to purchase.




Auto Engine Diagnostic Tool

The Veepeak OBDCheck 310A is a great upgrade from basic OBD2 code readers. The major function of this scanner is to read engine fault codes along with other diagnostic information like freeze frame data and real-time sensor data. It‘s plug and play without the need for any software. It directly plugs into your vehicle’s 16pin OBDII DLC and is powered by the vehicle battery. If your vehicle has a Check Engine Light on, the 311A is an affordable and helpful tool to help you determine the problem and find a solution.

Understand Why Check Engine Light Is On

Perform a quick diagnosis of your car anywhere with 311A when you have a check engine light. Plug into your vehicle’s 16-pin OBDII DLC, turn on the ignition and you are good to go. It enables you to read the error codes, find out what the problem could be and perhaps repair the car yourself, or let you know exactly what needs replacement in case you need to see a mechanic. Save you some trips to dealers or repair shops, avoid blind maintenance, unnecessary purchase of parts and repair costs that could cost hundreds of dollars. This is time and money saved.

Battery Voltage Reading

One Button Battery Check allows you to know your car battery status in seconds by reading the current battery voltage.


I/M Readiness allows you to check if the various emissions-related systems on the vehicle are operating properly so you can know whether your vehicle is ready for local emission inspection (SMOG Check).

View real-time PCM sensor data such as engine coolant & oil temperature, O2 Readings, Mass air flow, Fuel Trim, etc.

Retrieves vehicle info on Mode 09 supported vehicles, including VIN (Vehicle Identification Number), CID (Calibration ID) and CVN (Calibration Verification Number).

Built-in latest OBD-II DTC library allows you to check the code definitions quickly.



User Manual


The device works with OBD II compliant vehicles (year 96 or newer in the US). It does NOT work with OBD I vehicles. For OBD II compliant vehicles, there should be a 16 pin DLC (Diagnostic Link Connector) usually under the dash or behind ashtray AND a note on a sticker or nameplate under the hood: “OBD II compliant/certified”.

It reads check engine light trouble codes (sometimes called service engine soon).

Check the cigar fuse of your vehicle and try on another vehicle to see if the OBD connector is in good condition.

Make sure your vehicle is OBD2 compliant, the device is plugged in well and the ignition is at ON. Also start the vehicle to try again. Try it on another vehicle to see if the device is defective or incompatible with your vehicle.

First check if you have any other dash lights on. Sometimes fault from other systems will also cause the check engine light on. Or it’s a manufacturer-specific code that is not in the code library of the device.

Please note that not all codes can be cleared in this way. For some codes (especially confirmed or permanent), if the problem causing the code hasn’t been fixed, it won’t be cleared or it may be cleared, but will come back again right away. We usually suggest that you first use the code to check your car and fix the problems.

Not all vehicles support all the OBD II modes (depends on the car manufacturer).