nick n

i think this is a fuel related issue. i pulled an o2 misfire (B2 S1) late last year and it never came back, however, these came up recently.
i was driving around then parked; 5 minutes later i dropped the e-brake and pulled off - by 3rd gear i threw these codes. perhaps the o2 is officially dead (fwiw plugs/oil/bls/cts have <1k on them).
those with more experience please advise:


VAG-COM Version: Release 409.1-US


Chassis Type: 1J - VW G/J/B Mk4
Scan: 01,02,03,08,16,15,17,19,22,35,46,56

-------------------------------------------------------------------------------
Address 01: Engine
Controller: 022 906 032 EG
Component: MOTRONIC ME7.1.1G 5927
Coding: 0000132
Shop #: WSC 31414
6 Faults Found:
18672 - Oxygen (Lambda) Sensor B2 S1: Pump Current Open Circuit
P2240 - 001 - Upper Limit Exceeded
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 001 - Upper Limit Exceeded - Intermittent
16685 - Cylinder 1 Misfire Detected
P0301 - 008 - Implausible Signal - Intermittent
16689 - Cylinder 5 Misfire Detected
P0305 - 008 - Implausible Signal - Intermittent
18666 - Oxygen (Lambda) Sensor B2 S1: Signal Shorted to Heater Circuit
P2234 - 004 - No Signal/Communication - Intermittent
16690 - Cylinder 6 Misfire Detected
P0306 - 001 - Upper Limit Exceeded - Intermittent
Readiness: 0000 0000

Bracketracer

ok, kidding. Let's get some car information (year/make/model/engine) as well, and we'll go from there.

Uwe@Ross-Tech.com

There is no spoon, ah Bank 2. At least not in the physical engine. But the exhaust is split as though there were two banks...;-)

-Uwe-

Uwe@Ross-Tech.com

I wouldn't worry about the misfire codes unless they come back after the 02 sensor stuff is taken care of. For that you need a repair manual and multimeter. Check the wiring, signals and sensor per the repair manual. You've either got wiring issues to the sensor or the sensor is shot. Of course there's a small chance the problem is the ECU itself, but I'd consider that the least likely by an order of magnitude.

-Uwe-

nick n

yep i have the repair maunal; it's an r32. thanks for the info uwe - i'm going to pull the sensor.

nick n

..replaced the pre cat o2s; no more misfires or cels at the moment. it pulls waaay more linear now and the timing seems right. idle's booty smooth and doesn't hunt anymore with random intermittent misfires across the banks. gonna run some more diagnostics on it later.