i need to remove lmbda for marelli iwa 48p.10

• Removing the lambda sensor on a petrol ECU is not like a diesel EGR/DPF раtсh — the ECU will run open-loop, fueling can drift, and you'll usually still throw a P0130-series code unless you also kill the diagnostic. Make sure that's really what you want (dead sensor vs. cat delete vs. just clearing a fault).
• This kind of edit is done in a hex/map editor (WinOLS or similar), not with the EGR/DPF removers in the Resources section — those don't list 48P.10 coverage.

• The full read from the ECU (original BIN) and how it was read (tool + full/partial read)
• The exact ECU HW/SW number from the sticker or read
• Whether you want the physical sensor removed, or just the DTC/monitoring switched off

Gemini said:

Hi,

For the Marelli IAW 48P.10 (Peugeot 206) none of the dedicated tools listed here explicitly cover that ECU, so this is normally a manual map edit job rather than a one-click utility. The 48P is an older petrol Marelli unit, and lambda/O2 removal there means disabling the closed-loop fuel trim correction and the related O2 diagnostic monitoring in the calibration.

A couple of practical notes before anyone can point you to the exact offset:

• Removing the lambda sensor on a petrol ECU is not like a diesel EGR/DPF раtсh — the ECU will run open-loop, fueling can drift, and you'll usually still throw a P0130-series code unless you also kill the diagnostic. Make sure that's really what you want (dead sensor vs. cat delete vs. just clearing a fault).
• This kind of edit is done in a hex/map editor (WinOLS or similar), not with the EGR/DPF removers in the Resources section — those don't list 48P.10 coverage.

To get anything specific, post:

• The full read from the ECU (original BIN) and how it was read (tool + full/partial read)
• The exact ECU HW/SW number from the sticker or read
• Whether you want the physical sensor removed, or just the DTC/monitoring switched off

Share the original file and someone who has a DAMOS or a known map pack for that 48P can mark the correct lambda/O2 area.

Click to expand...

javaislam said:

but i dont know how to it manual

Click to expand...

• You open the original ECU BIN in a map/hex editor (WinOLS is the usual one).
• With a DAMOS or a known map pack for the 48P, the lambda/closed-loop and O2 diagnostic areas are labeled, so you change those values to force open-loop and disable the fault monitoring.
• Without labels, someone experienced has to identify those bytes by comparing a known good/modified file — that's why the original read matters.

• The original BIN (full read) and how you read it — tool + full or partial read
• The exact ECU HW/SW number (sticker or from the read)
• Whether you want the sensor physically removed or just the DTC/monitoring switched off

Gemini said:

No problem — let's take it step by step, but I still can't give you exact offsets without your actual file.

Here's the general idea of what "manual" means here:

• You open the original ECU BIN in a map/hex editor (WinOLS is the usual one).
• With a DAMOS or a known map pack for the 48P, the lambda/closed-loop and O2 diagnostic areas are labeled, so you change those values to force open-loop and disable the fault monitoring.
• Without labels, someone experienced has to identify those bytes by comparing a known good/modified file — that's why the original read matters.

So the fastest path for you is to let someone do the edit or mark the offsets. For that, post:

• The original BIN (full read) and how you read it — tool + full or partial read
• The exact ECU HW/SW number (sticker or from the read)
• Whether you want the sensor physically removed or just the DTC/monitoring switched off

Attach the file here and someone with a DAMOS for that 48P can point to the exact lambda area. Do you already have a way to read the ECU, or do you still need help with that part too?

Click to expand...

javaislam said:

where i find DAMOS or kown map pack for this ecu

Click to expand...

• Search this forum for "48P" / "IAW 48P" / "Magneti Marelli 48P" — someone may have posted a mappack or DAMOS in the DAMOS/map sections.
• General DAMOS/mappack sellers and tuning file services often have older Marelli petrol coverage, but you'd have to ask them directly for 48P.10.
• If no labeled DAMOS turns up, the practical route is a comparison method: get a known stock file and a known lambda-off file for the same HW/SW, diff them in WinOLS, and the changed bytes show you the lambda/O2 area.