i got a a6 3.0 fwd 2002
work done : t-belt, re-set timing ,replaced brearher hose assembly, spark plugs, new coils, all vacum hoses replaced , o2 sensors all 4 of them , i was told by indy shop needed all o2 sensors and bretaher hose assembly still running rough idle .

getting CEL CODES

16514 PO130 O2 SENSOR CIRCUIT, BANK1 1-SENSOR 1:MALFUNCTION

16891 P0507 IDLE AIR CONTROL SYSTEM RPM HIGHER THAN EXPECTED

16684 P0300 RANDOM MULTIPLE CYLINDER MISFIRE DETECTED.

16685 P0301 CYLINDER 1:MISFIRE DETECTED

16687 P0303 " 3:MISFIRE "

POWER SUPLY (B+) TERMINAL 30 :LOW VOLTAGE

16725 P0341 CAMSHAFT POS SENSOR CIRCUIT RANGE PREFORMANCE

wondering if 02 sensors fro autopartswarehouse is defective since the 4 wire sensor i used and connected it to the old elect plug maybe not a good idea to do that .

 

First step is to clear the codes and see what comes back afterward. A misfire could conceivably cause all of those codes to appear due to the air/fuel ratio detected by the O2 sensor on the passenger side (that's bank 1, where the two cylinders misfired and your other codes registered). Clear them and see what happens. If some of them reappear, post up with what you see and we can go from there. First thing i would do if you get more codes is a Seafoam treatment on the vacuum system, followed by new pluds, and then clear the codes again and go drive. If you still get misfire codes you may have bad coilpacks or a bad primary passenger-side O2 sensor.

Post up with your results and we can narrow it down from there.

 

hey Imthedevil
did just that tried to clear codes now im getting another code after i started up the car again 16686 p0302 cylinder 2 misfire
what is a Seafoam treatment?

thanks Imthedevil

 

You're still misfiring on the passenger bank so your problems have stayed localized to that side. It's possible that your O2 sensor is the culprit since it's monitoring that bank. How long a period of time went by between installing the sensor and getting these codes? You may have spliced the wires incorrectly if the codes came immediately. It's possible but unlikely that you got a bad sensor.

Type "2.8 seafoam" into the search feature and you'll find the info for doing the treatment. It involves sucking Seafoam engine cleaner into the engine to clean carbon deposits that can cause problems.

Just out of curiosity, do you have valvecover gasket leaks? If so, it is possible that the plug orifice gaskets are leaking oil down onto the bank 1 plugs. Pop a plug wire off and see if it's wet from oil down there. Enough oil on the plugs could cause trouble too.

 

no oil leaks on valves replaced those gaskets too . and the fuel filter too
spiled litle bit of coolant on drivers side when i was filling it up with new fluid going to check onthe wires tomorrow on the 02 sensors with 4 wires notice there are 2 white wires ( heaters ) does it make a difference where they go to the other white wires on the connector.
how about the POWER OUTPUT STAGES coulkd they be causing problems ? been reading some about them .

 

Ok that rules out the VCs as the cause. The two heater wires don't matter which sides they are connected to. It's possible that you miswired the other two - power and signal. That would explain why the code said Malfunction rather than something like "resistance too high" or "heater timed out" or something like that. It's basically saying that the signal is FUBAR. You could try reversing the signal and power wires and resetting the codes, then fire it up and see what you get.

The ignition control module (ICM) is possible sometimes in cases of misfires, but I don't know offhand what model years had a separate ICM and which ones have it integrated into the ECU. That's probably the power stages you're referring to - I haven't come across that term before.

 

thanks Imthedevil

i will do that let you know how it goes.

 

Sounds good - we'll figure it out

 

02 is in the ECM. No ICM.

Just for ***** try removing the coil terminal connector and use a small pick or screwdriver to pinch the female terminals tight then reattach it. I have had that problem a few times on my POS 3.0. I also use di-electric grease on every terminal I disconnect.

The good thing is it's only cyl 2, which means it's not the timing job. So you've got that going for you!!!

 

Not sure what you mean by the O2 being in the computer. The latest misfire was in cylinder 2, but initially it was in 1 and 3. Makes sense that the O2 sensor is bad though - if it was the coil or the driver for the coil it's unlikely that it'd be confined completely to the passenger side bank - something wouldve misfired in cylinders 4-6 somewhere in there. Dielectric grease and bending the terminals are a good plan, and I'd even hit them with a good contact cleaner as well - might as well give it the works.