If you own a Citroen C5 Aircross, a Peugeot Expert, or any vehicle with the widely used 2.0L BlueHDi diesel engine, a check engine light accompanied by "Engine Fault" warnings can be stressful. Two specific codes often appear together: P0183 and P2541.
In this guide, we analyze a repair tutorial by SA Diagnostic's to help you understand why these codes appear and how to fix them cheaply using the right diagnostics, featuring the iCarsoft CR ULTRA P.
The culprit is often this small sensor on the fuel line.
Decoding the Error Codes
When you plug in your iCarsoft CR ULTRA P scanner, you might see these definitions:
- P0183: Fuel Temperature Sensor "A" Circuit High Input.
- P2541: Low Pressure Fuel System Sensor Circuit Low.
The Misconception: Seeing "Low Pressure Fuel Circuit" often scares owners into thinking their fuel pump is failing. However, as the video demonstrates, these two codes are linked and usually point to a much simpler electrical component: the Fuel Temperature Sensor.
Video Walkthrough: Locating the Fault
See exactly where this sensor is hiding in the engine bay:
Step-by-Step Diagnostic & Repair
1. Confirm with Live Data (Don't Guess)
Before buying parts, the technician advises: "Check for the voltage, see if you're getting the correct voltage."
Using the Data Stream function on the iCarsoft CR ULTRA P, you can view the raw voltage and temperature readings from the sensor. If the scanner shows no voltage or extreme temperature readings despite a cold engine, the wiring or sensor is at fault.
2. Locate and Replace
On the 2019 Citroen/Peugeot 2.0L Diesel engine:
- Locate the fuel pipes on top of the engine.
- The sensor is clipped into the fuel line (as shown in the video).
- Use a flathead screwdriver to gently lift the locking tab ("pull this back").
- Pop the sensor out.
3. The Golden Rule: OEM Parts Only
The video emphasizes one critical point: "We recommend you get original OEM sensor and not aftermarket."
Aftermarket sensors often have incorrect resistance values. Even if they are new, they might trigger the same P0183 code. Once installed, use your iCarsoft tool to Clear Fault Codes to reset the ECU memory.
Why You Need a Full-System Scanner
Fuel system faults can be tricky. A generic OBD2 reader might just give you "P0183". The iCarsoft CR ULTRA P gives you manufacturer-specific context, allowing you to see if other modules (like the BSI or Transmission) are also affected by the erroneous fuel data.
Related: Why OEM Sensors Matter (And Why Aftermarket Parts Fail)
Frequently Asked Questions (FAQ)
Where is the fuel temperature sensor on a Peugeot 3008 / 5008?
On the 2.0L BlueHDi engines, it is located on top of the engine, usually part of the fuel return line assembly. It is easily accessible without removing major components.
Can I drive with a P0183 code?
You can drive, but the ECU will use a default "safe" value for fuel temperature. This leads to poor fuel economy and potentially rough idling. It is best to diagnose it quickly with an iCarsoft scanner.
How do I clear the permanent P0183 code?
After replacing the sensor, the code may stay as "Permanent" until the car completes a drive cycle. You can speed this up by using the "Clear DTCs" function on your CR ULTRA P and then driving the vehicle for 15-20 minutes.
Diagnose Fuel Faults with Confidence.
Stop guessing and start fixing. Order the iCarsoft CR ULTRA P today for professional-grade diagnostics at home.
