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Fuel Issue: Trafic 1.9DCI 100 (04r) | Injector, Pump & Solenoid Replacement | Errors DF192 & DF208

Dzejuch 24414 12
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  • #1 16867828
    Dzejuch
    Level 8  
    Posts: 6
    Rate: 8
    Hello, for some time I have a problem with traffic, about half a year ago stopped firing in the morning and fired only on "haul". Later he couldn't fire at all. He was out of service and after 4 months it was time to reactivate. And here the problems begin when pulling the injections, one broke and the heads had to be removed. Now the traffic is being folded and replaced with new ones:
    -4 injections
    - pump after regeneration
    - solenoid (pressure control valve) for a new one

    But to keep going doesn't fire. After connecting, it displays errors df192 (fuel pressure sensor), df208 (solenoid) as permanent (cannot be removed).
    And now I have checked everything, i.e. cable resistances between plugs and computer, all power supply, mass, etc. I have no idea, I mean, I have to buy another computer and replace it and see what will happen (the fact is not really want to buy it, but it's difficult ) Smile. But maybe someone has a different idea?

    I will add these pressure valves and sensors on the strip, I have several and each has the same errors.

    I have already spent a few hours on this and stepped through everything with the help of ICT.
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  • #2 16867900
    pp_pablo
    Level 27  
    Posts: 805
    Help: 93
    Rate: 401
    See if it snaps from a cake.
  • #3 16868075
    Dzejuch
    Level 8  
    Posts: 6
    Rate: 8
    I tried it and it surprises me and when it comes to it I give it fuel but under low pressure on the rail.
    I was still thinking, for example, on the camshaft position sensor but doubtful.
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  • #4 16868154
    pp_pablo
    Level 27  
    Posts: 805
    Help: 93
    Rate: 401
    Ie. is it just how you piss with a poster? Have you looked at what condition your fuel filter is?

    Replace the valve on the pump.
  • #5 16868213
    Dzejuch
    Level 8  
    Posts: 6
    Rate: 8
    Well, it goes only on the cake, the fuel filter is of course new.
  • #6 16868247
    pp_pablo
    Level 27  
    Posts: 805
    Help: 93
    Rate: 401
    You regenerated the pump, you could buy a stimulant (price around PLN 150 with valve PLN 250-300). I would bet the valve behind the pump or on the injection rail.

    One of them:
    Fuel Issue: Trafic 1.9DCI 100 (04r) | Injector, Pump & Solenoid Replacement | Errors DF192 & DF208 Fuel Issue: Trafic 1.9DCI 100 (04r) | Injector, Pump & Solenoid Replacement | Errors DF192 & DF208
  • #7 16868313
    milejow

    Level 43  
    Posts: 13047
    Help: 1558
    Rate: 5102
    Dzejuch wrote:
    After connecting, it displays errors df192 (fuel pressure sensor), df208 (solenoid) as permanent (cannot be removed).

    What fuel pressure can be seen during start-up?
    Company Account:
    Działalność własna
    Mętów 99, Lublin, 20-388
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  • #8 16868408
    Dzejuch
    Level 8  
    Posts: 6
    Rate: 8
    I just didn't pay to buy stimulants, I probably paid for the pump 150 (because it was ok so I only paid for sealing). (I have good access here so I'm not playing with it anymore) :)
    As for the valve is also new and besides I have 5 of them on each and the same subject and the same with the pressure sensor. besides, he should build pressure and throw the rope with the dropped pipe at the injection but he doesn't.

    Pressure during start-up 0bar.


    Here the problem is rather some electrical because you can not delete these errors for a moment. They don't pop during filming, they are non-stop so it can't be mechanical failure.
  • #9 16868448
    pp_pablo
    Level 27  
    Posts: 805
    Help: 93
    Rate: 401
    Stupid question: how do you remove the connector from the filter and pump the pear this fuel flies?
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  • #10 16868477
    Dzejuch
    Level 8  
    Posts: 6
    Rate: 8
    Yes :)
    The filter is inserted plain metal from golf 2 and has a vent from the top so here is everything pikobelo :)
  • #11 16868789
    genek1000
    Level 35  
    Posts: 2292
    Help: 289
    Rate: 1047
    There sits EDC15. There are no miracles.
    The pressure valve and pressure sensor have no common points apart from the internal connections driver. Either you do not have one of the three masses (although I think they are connected in the middle anyway) or you have some common mass point ext. driver.
    the pressure sensor has a 5 Volt power supply from the controller. The pressure regulator has a 12v supply straight from the relay
  • #12 16871632
    Dzejuch
    Level 8  
    Posts: 6
    Rate: 8
    All the masses are and the computer is different and again the same :(
  • #13 21638875
    dawido250978
    Level 1  
    Posts: 1
    >>16871632 Mate, just check the plug from the fuel pressure sensor on the injection rail or plug and that all the wires are in the right order. My brother struggled for 5 months and it turned out that the service department, when replacing the plug and sensor, got the order of the wires in the plug wrong. Fuel was not coming out of the pump. Greetings.

Topic summary

✨ The discussion revolves around a fuel issue with a Renault Trafic 1.9DCI 100 (04r) that has failed to start after undergoing injector, pump, and solenoid replacements. The user reports persistent error codes DF192 (fuel pressure sensor) and DF208 (solenoid), which cannot be cleared. Despite replacing four injectors, a regenerated pump, and a new pressure control valve, the vehicle still does not start, showing 0 bar fuel pressure during startup. Various suggestions include checking the fuel filter, the camshaft position sensor, and the electrical connections, particularly the ground connections. The user has confirmed that all grounds are intact and has tried a different computer, but the issue persists, indicating a potential electrical fault rather than a mechanical one.
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FAQ

TL;DR: DF192/DF208 that won’t clear usually trace to wiring or power: the rail sensor needs a 5 V feed, and “There sits EDC15. There are no miracles.” Check the sensor plug order and ECU supplies before replacing parts. [Elektroda, genek1000, post #16868789]

Why it matters: This FAQ helps Renault Trafic 1.9 DCI owners fix hard-start/no-start issues without wasting money on unneeded parts.

Quick Facts

What do DF192 and DF208 mean on a Trafic 1.9 DCI?

DF192 flags the fuel rail pressure sensor circuit. DF208 flags the pressure control solenoid circuit. When both store as permanent, look for power, ground, or harness faults rather than failed hardware. The thread’s case showed both codes stuck even with multiple swapped parts. [Elektroda, Dzejuch, post #16867828]

Why do I see 0 bar rail pressure while cranking?

With DF192/DF208 active, the ECU may not read the sensor or control the regulator, so rail pressure stays at 0 bar. That matched the thread’s live data during start attempts. 0 bar plus permanent codes suggests an electrical issue, not a mechanical one. [Elektroda, Dzejuch, post #16868408]

Can a miswired rail pressure sensor plug cause a no‑start?

Yes. One documented fix was a 3‑pin sensor connector re-terminated with wires in the wrong order. The engine would not build pressure or start until the wire order was corrected. If your plug was replaced, confirm pin mapping matches the sensor. [Elektroda, dawido250978, post #21638875]

What voltages should I measure at the rail sensor and the regulator?

Measure a stable 5 V reference and ground at the rail pressure sensor, and 12 V supply at the pressure control regulator from its relay. Loss of either supply sets DF192/DF208 and blocks pressure rise. "The pressure sensor has a 5 Volt power supply... regulator has a 12v supply." [Elektroda, genek1000, post #16868789]

How do I quickly check the low‑pressure side before chasing wiring?

Disconnect the outlet at the filter and prime with the hand bulb ("pear"). Fuel should flow freely. In the thread, this check confirmed supply to the pump, focusing diagnosis on the rail sensor/regulator circuits. This saves time before deeper electrical tests. [Elektroda, pp_pablo, post #16868448]

Will starting fluid (ether) help me narrow the fault?

If the engine runs briefly on ether, air and compression are likely fine, and the problem lies with fueling or its control. The case vehicle ran only on ether, correlating with 0 bar reported rail pressure and permanent DF192/DF208. [Elektroda, Dzejuch, post #16868213]

How do I troubleshoot DF192/DF208 in three steps?

  1. Key ON: verify 5 V reference and ground at the rail sensor; check for 12 V at the regulator.
  2. Wiggle-test the harness while monitoring voltages; repair any dropouts.
  3. If voltages are good, scope or swap-test the circuits at the ECU connectors to isolate wiring breaks. Each step targets the ECU supplies these circuits require. [Elektroda, genek1000, post #16868789]

Could a camshaft position sensor cause these specific codes?

The OP considered the cam sensor, but the unmoving 0 bar rail pressure and permanent DF192/DF208 point first to the fuel-pressure sensor/regulator circuits or their supplies. Fix those before chasing timing sensors. Electrical faults here prevent any pressure rise. [Elektroda, Dzejuch, post #16868408]

What is EDC15 on the Trafic?

EDC15 is the Bosch diesel engine control unit used here. It supplies 5 V to the rail sensor and controls the pressure regulator via a 12 V-fed circuit. As one expert put it, “There sits EDC15. There are no miracles.” Validate its inputs and outputs. [Elektroda, genek1000, post #16868789]

I replaced injectors, the pump, and the solenoid. Why won’t it start?

Parts replacement did not help in the cited case because the root cause was electrical. The ECU still logged DF192/DF208 as permanent and rail pressure stayed at 0 bar. Test wiring, grounds, and connector pin order before more parts. [Elektroda, Dzejuch, post #16867828]

Do permanent (not erasable) DF192/DF208 mean a hardware failure?

Permanent, non-clearable DF192/DF208 usually indicate a present circuit fault: open/short wiring, missing 5 V/12 V, or wrong pin order. In the thread, faults were present even before cranking, pointing away from mechanical causes. [Elektroda, Dzejuch, post #16868408]

I even tried another ECU; what does an unchanged fault imply?

If swapping the ECU leaves DF192/DF208 unchanged, focus on vehicle-side wiring, connectors, power, grounds, and sensor plug integrity. The case saw the same behavior with a different computer, strengthening the harness/plug suspicion. [Elektroda, Dzejuch, post #16871632]
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