Question about 1991 Peugeot 405

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Peugeot 206 1.4 HDI Power Loss

My son has a Peugeot 206 1.4 HDI which has suddenly begun to lose power, particularly when going up hills. There are no warning lights showing and nobody seems to have a clue as to the cause. The mas airflow sensor has been replaced today but has not resulted in any improvement. If the airflow sensor is disconnected, the performance improves. A few weeks ago the engine coolant needed topping up and has needed more since, if this has any relevance. You can contact my son directly on andy_h91@hot,

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  • rhmaidan Mar 17, 2009

    I have a Peugeot 206 1.4 xline Petrol. I started having the same problems when going up hill and stopping, the car would not take first gear again when i started moving again. Suddenly the car over heats. when checking the coolant i noticed it is filled with a brown muddy soot. I fear it is an oil leak, but when i checked the motor oil it was clear. Can the motor oil be leaking in 1 direction, or is this gear oil leaking in to the cooling sytem since it is the same system cooling the motor and the gear chamber?

  • colin white May 11, 2010

    what you have done makes sense,if the airmass (diconnected)makes it go better ,you may have a faulty new one ! was it a bosch one you replaced it with ?

  •  patrick dierckx
    patrick dierckx Jul 26, 2012

    yes you have bad can check this by messure the motor compression.also queeze in the watertubes sometimes the oils come out .

  •  patrick dierckx
    patrick dierckx Nov 07, 2012

    yes it can,leak bolt depent on where gas ket is broken

  • Stepphan Mc Pherson Dec 07, 2013

    @ rhmaidan,i have the same problem .Did you get yours sorted out,what was the problem,thanks.



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I have a 206 1.4 hdi 52 plate and the last couple of days it has started to loose pwer and the revs drop what could it be

Posted on Feb 16, 2010

  • davehalle883
    davehalle883 Nov 07, 2012

    Hi i have had the same problem with the same car and have solved the problem by replacing the clutch pedal sensor


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Loss of power turned out to be a hole in high pressure hose to engine fuel pump

Posted on Sep 24, 2010

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What could be the problem here is a cracked head
when a car is running right the water/coolant should not have to be touched.
check to see after running the car for about 1 mins from cold also rev the motor a bit DONT SCEEM THE MOTOR for a diesel rev it to about 2.5rpm turn it off and check if there seems to be water coming from the exhaust if there is you have a cracked head
this is not cheep to fix for my car but get some prices before getting it fixed
with a cracked head depending on how bad it is can do a lot of damage to a motor as water is mixing with the oil and also can start corrosion within the motor
check the oil dip stick as well if it appers to be milky then you do have a cracked head
hope i hepled

Posted on Dec 27, 2008

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Hi i had a problem with intermittent lose of power on my 206 and i solved problem by replacing the clutch pedal sensor

Posted on Nov 07, 2012

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