For Peugeot and Citroen owners, especially those running diesel engines, understanding your vehicle’s health is paramount. While generic OBD2 scanners offer basic insights, a specialized tool can unlock a wealth of detailed information. Enter the Fap Citroen Peugeot Elm327 Obd2 app, a powerful Android application designed to provide in-depth diagnostics specifically for these car brands. This app, when paired with an ELM327 OBD2 adapter, goes beyond standard readings, offering access to manufacturer-specific data crucial for maintaining optimal performance and preventing costly repairs.
Peugeot DPF System Diagram
This dedicated app reveals a range of engine-specific parameters not typically available on generic OBD2 applications. These detailed metrics are particularly beneficial for diesel owners concerned with systems like the Diesel Particulate Filter (DPF) and its associated components. Let’s explore some of the key features that make this app an invaluable tool in your diagnostic arsenal:
Essential Engine Data at Your Fingertips
The FAP Citroen Peugeot ELM327 OBD2 app provides access to critical data points, empowering you to monitor your vehicle’s condition proactively:
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Battery State of Charge (%): (AntBattCharge) Crucial for understanding your car’s Start/Stop system functionality. The app displays the battery’s charge percentage, revealing why your Start/Stop might not be engaging. A charge below 70% can disable Start/Stop, while levels below 30% could indicate starting issues. Healthy batteries typically charge up to 80%, whereas consistently low readings even after long drives may signal battery replacement is needed.
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DPF Soot Load (Weight of soot in the FAP): This reading is vital for diesel owners. It shows the current soot accumulation in the DPF. When soot load nears 18-20g/L, the system should initiate a regeneration cycle, assuming conditions are favorable. Monitoring this parameter allows you to anticipate and understand DPF regeneration patterns.
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DPF Deposit Load (Deposits in FAP): Diesel engines with FAP (Filter Anti Pollution) systems utilize Eolys fluid (or DPF fluid) to lower soot combustion temperatures. However, Eolys leaves behind ash deposits that cannot be burned off. This reading indicates the accumulation of these deposits. Excessive deposit load signifies that the DPF is nearing the end of its service life and may require replacement.
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DPF Deposit % (Cinder count in FAP): Similar to deposit load but expressed as a percentage, this metric reflects the degree of DPF blockage due to ash accumulation. Approaching 40% blockage may trigger ECU warnings suggesting DPF replacement is imminent.
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Volume of Additive Reservoir (mL) & Volume of Additive in Reservoir (mL): These parameters are essential for managing your Eolys fluid levels. The app displays both the maximum capacity and the remaining volume of Eolys fluid. Low fluid levels will eventually require a refill, typically a dealer service. Note that the Eolys injection system often compensates for refills, so it’s generally recommended to refill your fuel tank fully when refueling from near empty. Eolys fluid management becomes relevant typically after 100,000 miles.
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Last Regen Before & Last 10 Regen Ave: These readings provide insight into your DPF regeneration history. “Last Regen Before” indicates the mileage since the last successful DPF regeneration. “Last 10 Regen Ave” calculates the average interval between regenerations over the last ten cycles. These metrics help assess DPF health and driving conditions’ impact on regeneration frequency.
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FAP Distance Travelled & FAP Life Left: “FAP distance travelled” shows the mileage accumulated since the DPF was installed, reflecting the vehicle’s overall mileage if the DPF is original. “FAP life left” is an ECU-calculated estimate of remaining DPF lifespan, factoring in past engine conditions. This value can decrease over time and is a useful indicator of when DPF replacement might be necessary, often around 100,000-125,000 miles.
Beyond DPF: Monitoring Engine Health
The app extends its capabilities beyond DPF monitoring, providing insights into other critical engine parameters:
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Oil Dilution (%): (OilDilution%) This parameter is crucial, especially in diesel engines with frequent regeneration cycles. It indicates the percentage of fuel dilution in the engine oil. Fuel can enter the oil pan during regeneration and post-injection processes. Ideally, this should be at 0%. Readings above 5% are considered critical and necessitate an oil change.
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Oil Carbon (%): (OilCarbon%) Measures soot or carbon buildup in the engine oil. Similar to oil dilution, values exceeding 5% suggest an oil change is needed. However, under normal driving conditions, this value rarely reaches critical levels according to ECU models.
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AC Pressure (AirCPress): Monitors the refrigerant pressure in the air conditioning system. This is helpful for diagnosing common AC issues in models like the Peugeot 308 and other Citroen/Peugeot vehicles.
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Injector Flow Correction (Inj.1FlowCorr etc.): Displays injector correction factors for each injector. These values represent multipliers indicating how much the ECU compensates fuel injection for each injector to maintain balance. A default value is 1. Values within +/- 0.05 are generally acceptable. While the ECU typically flags injector faults before these readings become drastically out of range, monitoring them can provide early indications of potential injector issues.
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Airpath Valve Controls: For troubleshooting air intake or exhaust valve problems, the app provides readings for:
- AirMixer: Intake throttle valve position (0% open, 100% closed).
- EGRPosIntr: EGR valve position (0% closed, 100% open).
- TurboGeomInstr: Variable Geometry Turbo (VGT) vane position (0% open – low boost, 100% closed – max boost).
Conclusion: Empowering Peugeot & Citroen Owners
The FAP Citroen Peugeot ELM327 OBD2 app is a powerful diagnostic tool specifically tailored for Peugeot and Citroen vehicles. By providing access to detailed engine parameters, particularly related to the DPF system, battery health, and other vital components, it empowers owners to proactively monitor their vehicle’s condition. Combined with an affordable ELM327 adapter, this app offers significant value for both preventative maintenance and troubleshooting, potentially saving you time and money on dealership visits. Whether you are a seasoned car enthusiast or simply a concerned owner, this app can provide the deeper insights you need to keep your Peugeot or Citroen running smoothly and efficiently.
