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I just bought an 03 crv because i got a deal on it but it has some issues, I’ll explain below;
____________SYPMTOMS_________
1.) The check engine light is on and is throwing a p0420 code. I know that this is catalytic insufficiency.
2.) High idle, like 1100-1400 rpms
3.) Transmission shifts a little hard and holds out a little longer then usual, especially the 1-2 shift
4.) The crv is a little hard on gas.Sometimes the check engine light will go off and when it does the idle returns to normal, the transmission shifts a little better and the mpg improves.
I have not done any diagnostics yet, mainly because I haven’t had the tools to do so. I haven’t took it to a shop either and I was hoping someone could at least point me in the right direction.The crv runs smooth, no misses or anything. No egg smell (yet) and it doesn’t bog down.
I was thinking its one of these things in order1.) an oxygen sensor or both
2.) a tps sensor
3.) a vacuum leak
4.) a maf sensorPlease help and thanks for any input.
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I would say if you don’t have the tools to look at live data, then you should at least pay the fee for diagnosis before throwing a stack of parts at it that may not help. Best of luck.
You can get scan tools that blue tooth to your phone fairly reasonable online. If you go that route, look for something you can look at live data such as fuel trims and O2 readings. That being said if you are not going to use it much, pay the diag fee. You may look at live data and may not give you much direction.[quote=”jjohnson1″ post=187951]I would say if you don’t have the tools to look at live data, then you should at least pay the fee for diagnosis before throwing a stack of parts at it that may not help. Best of luck.
You can get scan tools that blue tooth to your phone fairly reasonable online. If you go that route, look for something you can look at live data such as fuel trims and O2 readings. That being said if you are not going to use it much, pay the diag fee. You may look at live data and may not give you much direction.[/quote]Well I finally took the v to an a.s.e certified mechanic. He drove it and ran diagnostics which cost $25 and his conclusion was that the cat was stopping up and causing the tranny to act funny and the cat was “dead” because of faulty primary and secondary 02 sensors. I ask was he sure and he assured me that he was positive and that he could see both 02 sensors constantly fluctuating, which immediately raised a red flag for me because I knew that the upstream 02 sensor should switch voltage frequently over a wide variance but the downstream should stay steady. He suggested $700 in repairs which did not include oem parts obviously. I balked at his proposal and went home and ordered a denso downstream 02 sensor from rock auto for $90 shipped. I installed and reset the check engine light. Now the V idles smooth, gas mileage is up to normal, the transmission shifts good and no more cel. Its been 1,000 miles and so far so good. I think that I am gonna change the tranny fluid, its been several thousand miles since the last change and its a brownish red.
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