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Old 03-10-18, 10:21 AM   #1
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Default Odd Fault

The car (110HDi 2003) has been running well since I changed the MAF but today I was driving it and the EML came on and it went into limp mode. Well when I say limp mode sometimes it would accelerate well up to 3000rpm and other times struggle.
I turned the engine off and on again to no avail. So I drove it to my local garage to book it in to check the codes etc. I notice that the plipper key would not lock the car and I had to do it manually. After I'd booked the car in for Monday I started it and the EML had gone off and the car ran perfectly. Also when I locked it the plipper now worked.

Any ideas please?
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Old 03-10-18, 06:16 PM   #2
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Yes, cancel your garage appointment! Limp mode on my car was 2850 rpm but to that point it was running perfect. The only time I reached that rpm was if I left it in the lower gears too long. It still managed 70 in top though. Of course I never went any faster to check max speed but there was still room, rpm wise, to go faster.
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Old 03-10-18, 06:31 PM   #3
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I would but sometimes it won't accelerate. If it was just a cut off at 2850 then that would be fine but when it refuses to accelerate it's a bit dangerous.
Any idea if the plumper thing is tied in to it?
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Old 03-10-18, 06:33 PM   #4
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I don't understand what a plipper or plumper is. Please elucidate on what you mean.
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Old 03-10-18, 07:00 PM   #5
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He means the remote locking renault called them plips at some point and it seems to have stuck
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Old 03-10-18, 07:50 PM   #6
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Yes the remote locking thingy. Plumper was the predictive text on my phone and not a reference to size.
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Old 04-10-18, 08:52 AM   #7
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Ok then why did you change the MAF?
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Old 04-10-18, 09:40 AM   #8
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Because of another fault. I put that in a different thread. Changing the MAF definitely fixed that one. It could be that the MAF has failed because it was a Eurocarparts one. But the previous fault never showed up on the EML.
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Old 04-10-18, 09:41 AM   #9
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Quote:
Originally Posted by Crickleymal View Post
I would but sometimes it won't accelerate. If it was just a cut off at 2850 then that would be fine but when it refuses to accelerate it's a bit dangerous.
Any idea if the plumper thing is tied in to it?
I don't place much reliance on coincidence. My guess is an electronic gremlin at work, but the connection between the remote locking system and engine limping is too tenuous for insight. Maybe an intermittent Canbus fault? Hopefully, the fault code history will give more data.

One point - Peugeot electronics are very sensitive to low voltage, so if the alternator is dicey, and the battery low, a wide variety of spurious faults can come up, some of which may invoke limp mode.
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Old 04-10-18, 01:02 PM   #10
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If your OLD maf was faulty this would also disable the EGR circuit so now that your new maf is working the EGR system may well be showing a fault that was masked before due to the ECU ignoring it.
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