Ikapor

Hello. I have just signed up to this forum and have couple of issues with my wife's car. I was hoping someone could help.

A little history first. About 18 months ago her car was due for a smog check. Cel was on and she had it checked out. It basically said converters were bad. She had a friend at wyotech school so they took a look too for free( why not). They did the emission test and the cars emissions seemed to b just fine. Someone told her that the computer might be bad? Then I took off the battery to clear the codes (cel). She went for a smog check and passed. A few days later the cel wentback on.

A few weeks ago I replaced the valve cover gaskets and spark plugs and when reconnecting the plug wires again I switched cylinder 4 and 5 out so the car ran really rough. I switched them back and everything was normal car started right away and has been running smooth ever since.

Now 18 months later I finally got around to it and bought a vag tool for the cel codes. I checked the codes last night and found the following codes

p0442-EVAP Emission(small)
P0430-bank2 efficiency below trash old
P0420-bank1 efficiency below trash old
P0300- random/multiple cylinder misfire
P0304- cylinder 4 misfire detected
P0305- cylinder 5 misfire detected
P1602- power supply terminal 30 voltage too low
P0130- oxygen(lambda) sensor b1 s1 malfunction in circuit

I deleted all the codes and now imwaitingto see which ones will come back. Should I just buy the converter or should I start with sensors and maybe some other tests first. I. Think code p0300 p0304 andp0305 will not comeback
For those corresponded to me mixing up the spark plug wires.

GTA_Driver

Dont worry about the converters. As you can see, the car passed emissions just fine.

Are you putting premium gas in your car, or mid-grade or regular?

If you're bothered by the CEL, just get spacers for the O2 sensors.

Converters are very expensive, since you need to buy the entire downpipe with the cats, times 2 (one per bank). Thats $2500 right there in parts alone.

Ikapor

Thanks. What exactly do spacers accomplish?

4Driver4

See if your car is eligible for an ECU reflash.

GTA_Driver

Spacers are just that - it sits between the exhaust and the O2 sensor, reducing readings from the sensor. It will eliminate the CEL codes for "catalyst below efficiency threshold".

What codes came back?