Hi, I have a 93 1.8 GL impreza and I noticed increased fuel consumption. I checked the ECU for fault codes and it showed 2 codes
33 Vehicle Speed Sensor & 51 Neutral Position Switch


Anyone got any ideas
Thanks steve

 

those error codes are unlikely to cause increased fuel use..

mostlikely the lambda / O2 sensor in the exhaust

Simon

 

its more likely that i have been driving the car and not the wife (heavy foot)
but whats this speed sensor & Neutral Position Switch all about and where would i find the sensors
thanks steve

 

lol.. reset the ecu see JollyGreenMonster.co.uk
and check to see if they return.. I am assuming the CEL was not on and you just checked? they could be months old etc..

Simon

 

no jolly this is when resetting. after a reset i get error 33 & 51 cant clear them
i did a rest about 2 months back and it was clear so the fault is only withing the last few weeks
thanks steve

 

oh I see.. sorry.

strange then.. obviously the speedo works..

 

dont know i dont use it!!! lol
no it works find

ill tell ya what am getting and see if you can help

when driving it sames to be quite slow on the pull with a bit of a stutter now and then but when you very go for it and reach about 3500 till 5000 it gos like a dream. its only a 1.8 GL so i know its no sport or turbo but i know someone with one of these and it drives like a dream compared to mine.
Things try ed so far

Replaced fuel pump
Replaced MAF
Replaced plugs
Cleaned MAF/redex in tank down throttle body cleaned etc
Replaced airfilter
thanks steve