cls6

I had a cel a few days ago for code p1259 and the car stumbled around 4500 rpm. I searched and found its a vtec malfunction, and usually needs a new oil pressure switch and/or vtec solenoid. I cleared the code and it hasn't come back on, but I still have no vtec. I looked underneath the car but not sure which is which? Is the oil pressure switch the green one? Which one is the vtec solenoid and how do I take it off?

fuzzy02CLS

iTrader: (2)

How's your oil level? Too low & vtec will not engage.

cls6

The oil is full and I've driven less than 1,000 miles since the last change. And I don't know if it's relevant, but I have new o2 sensors and a new hi-flow cat. The cel came on the day after the cat was installed but before the o2 sensors were changed.

cls6

Is it terrible idea to drive it if I keep the rpm's in the lower half of the tach?

poisx7

iTrader: (1)

WELL the CAT is the source of ur problem. or the 02 sensors

poisx7

iTrader: (1)

mayeb clear the code and use some defoulers to adjust the lenght of the o2 sensor in the Hi flow CAT.

cls6

I cleared the code when it first lit up and it hasn't come back. A delouler was put on the rear o2 sensor when I changed it. The old cat was a hi-flow too but a smaller diameter and I had a defouler on that sensor.

poisx7

iTrader: (1)

i dont know ....sounds weird that it is affecting ur vtec. i dont see how having a hi flow cat messes up ur vtec solenoid switch. are this just any o2 sensors ?? or oem

is ur oil presssure OK.
is ur speedo/cluster still working fine ?

cls6

I put in denso sensors, but not because of this problem; I had a cel a couple times several months ago for o2 sensor voltage or something like that, but I've barely even driven it the last 3 months. I don't have a gauge to check the oil pressure and I'm not sure where to check it. Speedo works fine. The car runs good in lower rpm's.