nessasary to replace o2 +cat?

[Emile]

I searched the forum as best I could

Would like your opinion on this:Got codes po135 o2 heater ciruit bank 1 po430 cat eff. low bank 2

Can I get by till the spring say about 10K miles without fixing?and ramifications of not fixing

2000 I30t 129,000 now NJ ispect. good thru May

by then I would get a new 1I have put a few $ in repairs and am getting the feeling it would be safer[no highway break downs] and less expensive to pick up a new or newer used 1but maybe you would recommend putting some more $ in , it will work out in the end?

[goody90q45]

The codes are related. The marginal O2 sensor is letting unburned fuel get to the cat and setting off its sensor. The problem with driving and not fixing is the extra fuel cost going out your tailpipe and the possibility of eventually plugging the cat and having to replace it.

[maxnix]

OEM catalytic converters (which last, after market do not) are about $1,100, probably more like $1,400 this spring after Nissan raises their prices.

A good NTK O2 sensor is about $65 from

http://www.sparkplugs.com

Replace it now and if the converter code is still present, take it to a qualified technician who works on the VQ series every day.

[SteveTheTech]

The codes are indeed related but the location is different. The heater code is in the rear bank exhaust manifold. The PO430 is set when the ECM detects a greater then .75% cycling rate on the H02S2. Without further testing I would just be guessing but given the mileage and year of your vehicle, a catalyst failure is not out of the ordinary. The repair should indeed be performed as soon as it is possible to ensure that your car continues to operate within normal operating conditions. Until then you will experience driveability concerns that may begin to compound and get worse as the cat material deteriorates further, if the material breaks up there is an increased potential that some of the material may get drawn back in to the combustion chamber causing severe engine failure.

All engine components have a serviceable life, airbags and catalytic converters were designed to perform reliably for ~10 years on average. This is not a baseline just the nature of the beast. I have seen some that last two or three times that without and issue and some that don't make it 20,000 miles.

[NJ 666]

P0135 is a bank 1 front O2 code. P0430 is a bank 2 cat code. And yes I have seen engines replaced because the cats deteriorated and through exhaust reversion damaged the cylinder walls.

[jackg35]

there is a ecm update for that concern but for that milleage maybe u need to replace your cat,tube and 02 sensors.

[Q45tech]

When cat metals increased in price in middle 90's [again in 2002 and 2006 but more severe] a decision was made to reduce initial cost at the expense of beyond 100k and 10 year life so they wouldn't have to increase MSRP so much. After all warranty and new car buyers usually sell cars before 6 years.

Saving $100 at factory can lower retail price by $400 after all who cares if a 129k vehicle needs $1000 cats especially if your business is selling new cars or repairing old ones.

Only the rare bird who keeps cars or the 2nd or 3rd owner.