Impreza/Baja

I had the Baja hooked up to the diagnostic machine and the results were as follows; Quick Test Results- PO 303 PO 420 Catalyst System Efficiently Below Threshold Bank 1 The O2 Sensor Bank 1-#1 =2.12 Volts O2 Sensor Bank 1-#2 =0.75 Operating Temp = 165f The computer also said the car was missing on the 3rd cyclinder. His theory is the O2 sensor#2 is the culprit and by replacing it the #3 cylinder's richness will be remedied. This theory works for me.. Anybody care to agree or disagree? Thank you.

Best place to start is with the CEL. What is the code? The 1st and only mechanic, thus far, that ran a diagnostoc on the Baja said it was the the cat conv.but, I've learned on here that the symptons are inconcistant with that diagnosos.I am making an appt with my local mechanic tomorrow for a second opinion.That 1st guy was set on replacing the cat. at $1500.00 even though the car had passed smog 2 weeks before that. He ended up taking $100 from us too by saying he'd have to return the cat and we'd pay the "handling fee" as we didn't want to commit to the work after thinking it over. Total lie, as there was no way the part was even mailed out yet. Aaarg!

Yeah, I apoligize for the weak opening description. The CEL did come on very close to the time this problem arose. The timing belt was replaced soon before we bought the car.It is "studdering" in low rpm's in D4 and D3 now. Weather temps and humidity do not seem to influence. The PCV valve has not been replaced recently to my knowledge. I'm liking the knock sensor as the culprit theory, due to the low rpm's and D4, D3 non discrimination. Sometimes the CEL will go off for a day or two and then return..no other lights are coming on.it just had a tune-up.in fact, it was after the tune-up that the CEL came on. Again, thank you all for helping us out!! Can't wait to get the Baja rollin' like she should be.

"Thats normal. When you find the car hunting a lot in rolling hills put the car in D3 and everyone and everything will be happier." There is no way the condition we are experiencing here is normal.a total loss of power with car trembling stutters for as many seconds as you leave it in D4.now it has progressed to doing the same in D3.the car was functioning like you'd expect any AT vehicle to for the 1st 6 weeks of ownership and is progressively getting worse.a mechanic told us that the Catalytic Converter wasn't functioning at full capacity recently. Any chance the loss of back pressure from this is the source of the issue? The car has only 126,000 miles...I appreciate all the clues I'm getting on USMB!

Thanks! the problem is radically reduced when driving in D3 and usually only occures under re-acceleration in D4. The area we live in is very hilly and curvy so for now D4 is being avoided.

My girlfriends recently purchased 2003 Baja suddenly has a new glitch in the tranny. it seems to waiver back and forth between gears when driving on undulating terrain. Especially, when in Drive. between 3rd and Overdrive is where its happening. it ends up stuttering between the two for a bumpy couple of seconds..? Somebody advised me that the "Sylenoid" might need to be replaced and that the part was only, $30 bucks! Any help in this matter will keep a great school teacher from having to spend too much $ on an expensive alternative diagnosis. Thank You!