All Things Mk5 > How to Guides / Troubleshooting
02 Sensor Issues After downpipe & map
NorthWest:
So had my standard down pipe removed and fitted with a 3inch down pipe from turbo back to res.
as normal and expected the cel light came on after about an hour of driving home!
Had the car mapped on dyno 2 days later. Ill acttach a copy of print out to see what ye guys think. Tuner mapped car with engine light as normal and went off (happy days). As I was leaving it came back on again ! went back he scanned it and getting a 02 sensor fault. he said must be faulty but seems very sus that its all of a sudden faulty !?
anyways... Cel light now currently back on at home again. Scanned it my self with 'Carly OBD' getting fault code P0030 ( Oxygen (Lambda) Sensor B1 S1: Heating Circuit, Malfunction / Open Circuit ) on vw codes.
ive ordered an 02 spacer 90degree elbow to see if it'll help with cel?
any further suggestions? Take a look at the print out see what ye guys think. Its my first GTI and tune ! novice really :jumpmove:
Cheers lads !!
rich83:
Don't use a spacer. Buy a genuine Bosch sensor. They do fail, mine did a year or so ago.
Those torque figures are nonsense too. No way it's making 440ftlbs
NorthWest:
Which one will I replace mate? The primary one or the secondary one ?
That’s what I thought . It’s huge numbers like . By looking at the graphs it is a big jump but I agree with you for sure !
rich83:
B1... bank 1? So it will be the one at the back of the engine before the cat.
bobby_fodge:
These figures are from Rtech's website site showing what you can expect at each level of their map, hardware dependent of course.
Stage 1 custom remap 240-255 hp 280-310 lbft
Stage 2 custom remap 265-275 hp 290-330 lbft
Stage 2+ custom remap 275-290 hp 355-360 lbft
Stage 3 custom remap 330-350 hp 350-370 lbft (k04 or k03 hybrid setups)
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