Monitor your diesel engine's particulate filter (DPF/FAP) and its regeneration, in real time, right from your phone.
Before you install: what you need1. An OBD2 Bluetooth adapter: a small plug that goes into your car's socket, usually under the steering wheel. Without it the app can't read your car (only the Planner works).2. For the DPF, one of these diesel engines (if in doubt, check the engine size on your registration document, field P.1):1.5 dCi (1461 cc): Dacia Duster, Sandero, Logan · Renault Clio, Mégane, Kangoo, Captur · Nissan Micra, Note, Qashqai, Juke · Mercedes A, B, CLA, GLA 180 CDI/d with the 1.5 only, CitanMercedes 2.1 CDI (2143 cc): GLC 220d/250d · C- and E-Class 200-250 CDI/BlueTEC/d · GLK · ML 250 · CLS · SLK · A, B, CLA, GLA 200-220 CDI/d with the 2.1 only · Vito, Viano, V-Class, Sprinter · Infiniti Q50 and Q30 2.2d · Jeep Compass and Patriot 2.2 CRD. Tested on a 2016 GLC 250d. The Mercedes 1.8 CDI doesn't work yet.3. A car from 2008 or newer.Engine data, trouble codes and the Planner: free on every compatible car. Your engine isn't here yet? Become a tester.
Normal state
Regeneration in progress
Engine tab
Diagnostics tab
Short trips and mostly urban driving make it hard for the particulate filter to regenerate — exactly the conditions most common in the city. DPF Guard shows you what's happening to your DPF while you drive, so you know when a slightly longer drive is all it takes, without a trip to the shop just to find out.
Read directly from the engine's control unit over OBD2, updated in real time as you drive.
Instantly see whether the DPF is regenerating: active, when the ECU is cleaning the filter, or passive, with a hot DPF and falling soot.
How much soot has built up in the filter, with a bar that adapts to your car's regenerations: percentage and estimated km to the next one.
Filter temperature while driving and during regeneration.
A key indicator of how clogged the filter is.
Soot left after the last regeneration and failed attempts, so you catch a cycle that didn't complete early.
The last regeneration always in view under the DPF status, with a timer for the one in progress, and the list of those seen by the app, interrupted ones included.
Counted by the app from the vehicle odometer, starting from the first regeneration detected with the app connected.
Total vehicle mileage, speed, coolant temperature and battery voltage, in a row of compact cards.
Even if your engine isn't supported for DPF monitoring yet, DPF Guard reads the standard OBD2 data every car must provide. No purchase needed.
RPM, speed, coolant and oil temperature, intake air, rail pressure, battery voltage and more: only the parameters your car declares as supported are shown.
Check-engine light and stored, pending and permanent fault codes, with a description. For DPF codes, also what to do. Read only: no clearing that would hide a fault.
Service, oil, filters, timing belt, insurance, road tax, inspection: DPF Guard reminds you when they are due, for any car, even without an adapter.
Whichever comes first. Repeating reminders start again by themselves from the date and km of the job, and the history keeps track of what you did.
A reminder when a deadline gets close and on the day it is due, even with the app closed. For the ones you can't forget: "Nag me until it's done".
With the adapter connected the mileage updates by itself, if the car provides it; otherwise you type it in. With several cars, each one is recognised when you plug in the adapter.
Free with 1 car and 2 reminders; DPF Guard Pro adds unlimited cars and reminders.
Reminders by urgency
New reminder from templates
Mark as done
Plug the adapter into the socket under the steering wheel and, the first time, pair it with your phone over Bluetooth.
DPF Guard reconnects by itself to your last adapter and reads the data straight from the car, no workshop tools needed.
When the DPF starts regenerating, a clearly audible alarm sounds, even with the phone in your pocket and the screen off.
You need an OBD2 Bluetooth adapter, the kind sold online (look for ELM327). We tested it with vLinker and Vgate iCar; others usually work too, but some cheap models are less reliable.
DPF monitoring works on the 1.5 dCi (Renault, Dacia, Nissan and Mercedes 180 with the 1.5), tested on Dacia Duster and Mercedes A 180 CDI, and on the Mercedes 2.1 CDI, tested on a 2016 GLC 250d. You need a car from 2008 or newer: if you see data in the app's Engine tab, your car works. You can also try the DPF part for free before buying. More diesel engines are on the way.
We add new diesel engines with the help of the people who drive them. We are already working on Peugeot/Citroën 1.6 HDi/BlueHDi and 2.0 HDi, Renault 1.6 dCi and Fiat 1.3 MultiJet.
We send you a test version: drive a few trips with your adapter and send us the data, which the app exports without personal information. Write to us with your car, year, engine and adapter. Or search for your car in the app and tap "Tell me when my car is supported".
Engine data, trouble codes and the Planner (1 car and 2 reminders) free for every car. DPF Guard Pro is a one-time purchase: unlimited DPF monitoring (try it free for 3 minutes per session first), unlimited cars and reminders, mileage read from the car. Already unlocked the DPF? You already have Pro. No subscriptions, no ads, no account.
