pinkypurkhardt

iTrader: (9)

Hi there

im after some help i have a CEL that keeps apearing code P0136 and the odd P0171 now i have checked this against the the code meanings which are a rear 02 sensor malfuction and fuel trim to lean. i had this problem diagnosed at subaru a while back and they said i need a new front a/f sensor for the nice sum of £265 but then i have been advised that this could be from the rear lamda??????? after looking on here i just ended up more confused so is it the front a/f sensor or the rear and were is the location of the front a/f sensor is it in the up pipe pre cat or is it in the headers.

cheers in advance for any help

pinkypurkhardt

iTrader: (9)

Turbo Tez

iTrader: (8)

The front sensor is in the headers on the righthand side. You can get an o/e denso one for 140 quid so dont get ripped off going to the dealer. The one in the up-pipe is an exhaust gas temp sensor(egt) and can do away with that one along with the rear o2.

pinkypurkhardt

iTrader: (9)

cheers tez thats good to know cheers for clearing that up mate good news on the £125 saving thanks again.

brendy76

iTrader: (6)

Can the uppipe and rear wires be cut and tied then?
Would a leak in the front of the exhaust somewhere be enough to throw the following errors, I have cleaned the maf with isopropyl since running this though.

P0102 Maf or Vaf A circuit low input.
P0171 Generic, system too lean (bank1)
P0113 IAT sensor 1 Circuit high imput