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[Solved] Renault Magnum 480EEV 2013: Low Oil Pressure at Idle - Replaced Sensors & Compressor

andrzej.andrzej 11421 11
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  • #1 16826836
    andrzej.andrzej
    Level 10  
    Posts: 91
    Help: 3
    Rate: 65
    480EEV 2013 oil pressure drops to 1.5 at idle time sometimes. I replaced the pressure sensor on the filters and the one next to the compressor and then the same.
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  • #2 16826903
    igorek83
    Level 24  
    Posts: 895
    Help: 45
    Rate: 194
    What mileage of the car, what oil is poured in this car?
  • #3 16827046
    andrzej.andrzej
    Level 10  
    Posts: 91
    Help: 3
    Rate: 65
    500 tkm. Valvoline 15 W 40. Normally it has 2.6 on slow, sometimes it will drop to 1.5 but when it comes it is ok
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  • #4 16830651
    igorek83
    Level 24  
    Posts: 895
    Help: 45
    Rate: 194
    Did you break the oil pan? see what happens, the mechanical damage will be filings.
    It is possible to confuse the type of oil ???
  • #5 16831817
    andrzej.andrzej
    Level 10  
    Posts: 91
    Help: 3
    Rate: 65
    Nothing was buried. But if there were any mechanical damage, the pressure would rather be weak all the time, not only in some mometas. I have one type of oil and all my cars use it
  • #6 16857242
    igorek83
    Level 24  
    Posts: 895
    Help: 45
    Rate: 194
    When you drain the oil, see if there is nothing strange in it (filings)
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  • #7 16858734
    Cobrat
    Level 22  
    Posts: 428
    Help: 35
    Rate: 499
    There is a valve in the base of the oil filters (probably screwed on the screw, on the allen key, I don't remember anymore, there was a photo of the base somewhere with a description on the forum, but I can't find it), did you check? Of course, I assume that branded oil filters ...
  • #8 16891334
    andrzej.andrzej
    Level 10  
    Posts: 91
    Help: 3
    Rate: 65
    Hello. I had the bowl removed and everything is ok. I replaced the piston bottom cooling valve because it was wet, but there is no effect. On the basis of the filters I found one valve, such a mushroom with a spring, probably on the key 22 and it is also ok. Anyone have a base diagram for eev ???
  • #9 16927268
    Cobrat
    Level 22  
    Posts: 428
    Help: 35
    Rate: 499
    The description of the base is unfortunately in Spanish, but google translate and forward ;)
    Attachments:
    • Renault Magnum 480EEV 2013: Low Oil Pressure at Idle - Replaced Sensors & Compressor podst oleju dxi.JPG (71.19 KB) You must be logged in to download this attachment.
  • #10 17092614
    Anonymous
    Level 1  
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  • #11 17092760
    Cobrat
    Level 22  
    Posts: 428
    Help: 35
    Rate: 499
    Fact, right, sorry, this basis is from DXI 11 E3 / E4, and the author's DXi 13 engine. Somewhere I had such a diagram with E5 and it hit :| .
  • #12 18636763
    andrzej.andrzej
    Level 10  
    Posts: 91
    Help: 3
    Rate: 65
    Oil level and temperature sensor in the oil pan. After replacement, the pressure returned to normal
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Topic summary

✨ The discussion revolves around a Renault Magnum 480EEV 2013 experiencing low oil pressure at idle, dropping to 1.5 bar from a normal 2.6 bar. The user has replaced the oil pressure sensors and the compressor but continues to face the issue intermittently. Various suggestions include checking the oil type (Valvoline 15W-40), inspecting for mechanical damage, and examining the oil pan for filings. A valve in the oil filter base was also mentioned, and the user confirmed that the oil level and temperature sensor in the oil pan was replaced, which restored normal pressure.
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FAQ

TL;DR: Intermittent idle oil pressure drop (from 2.6 to 1.5 bar) was traced to the oil pan level/temperature sensor; “it will drop to 1.5.” [Elektroda, andrzej.andrzej, post #16827046]

Why it matters: This FAQ helps Renault Magnum DXi13 owners diagnose low idle oil pressure without replacing good parts.

Quick Facts

What’s the most common fix for idle-only low oil pressure on a 2013 Magnum 480EEV (DXi13)?

Replace the oil level and temperature sensor in the oil pan. The owner reported pressure returned to normal immediately after this replacement, following other unsuccessful swaps. “After replacement, the pressure returned to normal.” [Elektroda, andrzej.andrzej, post #18636763]

Which symptoms were observed before the fix?

At warm idle, the gauge showed about 2.6 bar normally, but sometimes dipped to around 1.5 bar. Driving returned readings to normal. These intermittent dips triggered investigation and part replacements before the root cause was found. [Elektroda, andrzej.andrzej, post #16827046]

Does replacing the pressure sensors fix this particular issue?

Not in this case. The owner replaced the pressure sensor on the oil filters and the one by the compressor with no improvement. That pointed diagnosis away from those sensors toward the pan sensor and other components. [Elektroda, andrzej.andrzej, post #16826836]

What mileage and oil were involved when the problem appeared?

The truck had roughly 500,000 km and ran Valvoline 15W-40. The oil choice was consistent across the fleet and was not the cause here, based on subsequent findings and the final fix. [Elektroda, andrzej.andrzej, post #16827046]

What quick checks should I do before buying parts?

Inspect drained oil for metallic filings and check for obvious sump damage. Confirm filter brand and condition. These checks can reveal mechanical wear or a collapsed filter before chasing electrical faults. “See if there is nothing strange in it (filings).” [Elektroda, igorek83, post #16857242]

What is the oil filter base ‘mushroom’ valve?

It’s a spring-loaded valve in the filter base that can affect pressure behavior. On this truck it was located under a hex, inspected, and deemed OK. If stuck, it could alter readings at idle. [Elektroda, andrzej.andrzej, post #16891334]

How do I replace the oil level/temperature sensor in the pan?

  1. Drain engine oil and remove the sump access as needed.
  2. Disconnect the sensor connector and unbolt the sensor from the pan.
  3. Install the new sensor with a fresh seal, reconnect, and refill oil. Pressure normalized after this on the reported truck. [Elektroda, andrzej.andrzej, post #18636763]

Could a wrong technical diagram mislead my diagnosis?

Yes. A diagram shared initially was for DXi11 E3/E4, but the affected truck uses a DXi13. Using the wrong schematic can send you after non-existent parts or ports. “This basis is from DXI 11… author’s DXi 13 engine.” [Elektroda, Cobrat, post #17092760]

Does the 2013 oil filter base have extra solenoid valves?

Yes. A contributor noted two solenoid valves on that year’s base, which differs from earlier layouts. Confirm your exact engine and year before testing or ordering parts. [Elektroda, Anonymous, post #17092614]

What other parts were swapped before the final fix?

The sump was removed and checked, the piston cooling valve was replaced due to dampness, and the filter-base valve was verified. None resolved the intermittent idle pressure dips. [Elektroda, andrzej.andrzej, post #16891334]

Is 1.5 bar at idle always a sign of mechanical failure?

No. Here, intermittent 1.5 bar at idle wasn’t due to bearings or pump failure. Electrical sensing from the pan sensor caused misleading readings, and replacing it normalized pressure. [Elektroda, andrzej.andrzej, post #18636763]

What’s a quick rule of thumb from this case?

If idle pressure dips are intermittent and pressure sensors read fine under load, prioritize the pan-mounted oil level/temperature sensor before major mechanical work. “Replace the oil level and temperature sensor.” [Elektroda, andrzej.andrzej, post #18636763]
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