Annoying CHECK-ENGINE light (MIL/CEL) pops up on the dashboard? The ADD Tuner Plus app can easily show the MIL/CEL error code and a brief description immediately. And you can CLEAR the error code via a touch of a button. Yes, it is that simple!

ADD T-PLUS also features intensive and useful tuning data such as short/long-term fuel-trim, timing advance, MAF, MAP, IAT, RPM, and engine load...etc. All organized in an easy to read format with graph plot in a logical timeline for correlation reference!

And before you bring your car to SMOG - use the ADD T-PLUS to check all your car's monitor status as a pre-check and save money!

Cool feature continues - you can use ADD T-PLUS fancy digital dash mode for your daily drive! It boasts a cool swiping RPM ring, digital speedometer, coolant temperature, fuel tank, instantaneous and average MPG, Overspeed warning...etc. It records and shows the maximum RPM and speeds you achieved. You can even adjust the RPM red-line to match your car...

ADD T-PLUS runs on most Android phones and can be used in most cars.