Peugeot 406 (1999 - 2004) - 2000 2.0hdi 90 - engine management light

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Wed 25 Jun 2008 01:04
2000 2.0hdi 90 - engine management light - cbmilly
My 2000 W reg hdi estate 90 bhp with engine number DYFR....... and 130K mileage is showing the dash engine auto-diagnostics warning light, but no message on the central display. The car was serviced last week. I wonder what the most likely cause is, and the likely consequence of ignoring the light.

Cheers


Edited by Webmaster on 25/06/2008 at 14:23

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Wed 25 Jun 2008 13:57
2000 2.0 engine management light, 406 hdi 90 - Screwloose

Impossible to say without a code-read - there are 3,000 possible codes.
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Wed 25 Jun 2008 22:33
2000 2.0 engine management light, 406 hdi 90 - cbmilly

Many thanks, Screwloose; I'll be off to the garage/dealer then.

Cheers

cbmilly
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Sat 28 Jun 2008 12:25
2000 2.0 engine management light, 406 hdi 90 - cbmilly

Reading of the code at my local garage identified a code for the throttle position sensor switch only. The autodiagnostics light has since extinguished once the code was read.
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Sat 28 Jun 2008 13:18
2000 2.0 engine management light, 406 hdi 90 - Screwloose

Knowing the code number would help. There is no throttle switch on these; but there is an official modification for the accelerator position sensor wiring to try and stop repeated false codes like P0121/2 and P0221/2.

Don't be tempted to change the sensor - that'd be £250 down the drain.
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Sat 5 Jul 2008 11:18
2000 2.0 engine management light, 406 hdi 90 - cbmilly

Thank you, screwloose; the code was P0220 with the message - throttle pedal position switch, B circuit. The light has not reappeared, I don't think I'll be taking any action unless advised otherwise.

Cheers
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Sat 5 Jul 2008 16:30
2000 2.0 engine management light, 406 hdi 90 - Screwloose

The scantool has picked the wrong code definition for your ECU there; for a Bosch EDC15 system P0220 is:-

"Accelerator pedal position sensor B - circuit malfunction."

This is one of the codes the official wiring modification was intended to stop. If/when it returns; get your garage to carry out the earthing change - but make sure they understand what they are doing, if there's going to be any chance of it working.
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Sat 5 Jul 2008 17:53
2000 2.0 engine management light, 406 hdi 90 - amateur
I have an 03 RHY 2.0 Hdi with the same fauly but showing "pre-post heater relay" on the computer fault. A new car to me so a little worrying. Limp home mode is no fun and the dealers can only suggest a day or two's investigation at mega-bucks can you help?
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Sat 5 Jul 2008 18:11
2000 2.0 engine management light, 406 hdi 90 - Screwloose
amateur

There is an answer on the thread to which you attached your original question.
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