help a class fault code p1886 - Mercedes-Benz Forum

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post #1 of 1 (permalink) Old 10-26-2010, 04:55 AM Thread Starter
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Date registered: Oct 2010
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help a class fault code p1886

hi, iam looking for a few pointers of any mercedese tecnisions who may read this , i have obtained a mercedese a160 fully automatic with f problem year 2000 with 27000 genuine miles on the clock. i do car body repairs for a living and airbag systems , i can usualy sort most problems out on anything but i have little knowledge on the worst mercedese automatic ever made. The car was parked up for 3 months with no gearbox problem then a third party purchased it , he realised it was not changing up and down ,and it was displaying the f mode on the dash ,then i got my hands on it and my theory is that it went into f mode because of voltage drop in battery he then panicked pouring atf fluid in making the problem multiply,i think this because the anti tamper pin was broken on the filler cap ,the atf reading when cold is on full, i have emptied 2 litres of atf out,warmed up gearbox to required temp and checked with temp probe and rechecked level, it still reads full , so the torque converter tank keeps refilling atf pan. i put my diagnostics on it shows fault code p1886 presure to low at regulating valve on 1/4/ and 3 and too high on 2nd 5th and reverse, when you drive it in f mode permently stuck in 2nd and pull up and put it in neutrel then back into drive you get 3rd and 4th
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