2000 Honda civic 02 sensor misfire?
2000 Honda civic ex
Car has 5 codes.
First is o2 sensor bank 1 sensor 2
The rest are
P0301-P0304 and P0300
All misfire codes but no symptoms of a real misfire. Could the bad o2 sensor cause the misfire codes? I used a scan tool and verified the o2 sensor is bad.
Car already has new plugs wires cap rotor.
It hard to read and see what you've replaced: Like you say:"Car already has new plugs wires cap rotor."
How the old plugs look like if you replaced it? No symptom of misfiring? What is the vacuum reading? MAP readings? Compression readings? If you have doubt, have it check out.
If you've already verified the O2 then take care of it. The O2 sensor reads the amount of oxygen in the exhaust post combustion. From this reading it relays to the PCM how much gas to add into the mixture for the next cycle.
If an O2 sensor has been contaminate or has any substance build up on it, it is not capable of giving an accurate reading of oxygen. This misread of the O2 will give the engine an improper, to the spectrum, the balance of fuel and oxygen which could cause a premature or no ignition.
My advice would be to pull the spark plugs for inspection, check to see if its white or full of sludge. If it's white, the engine is running lean, if sludge: running rich. Either way the O2 sensor could be causing the problem. So replace the defect O2, test drive and see if the misfire codes return.
How many miles on the Civic? It could be the early stage of a CAT deficiency. Look at the history code and see if you have P0420. Monitoring the front and rear O2 reading at 2000Rpm would help to see the CAT good function. CAT is about going south sometimes will trigger the misfire codes, at least a random one (P0300)
If the misfire codes return: Some of the remedies I've done in the past on Honda Civic misfire codes (P0300-P0304)
If you hook up your scan tool and pull one or more misfire DTCs (P0300 through P0304) from computer memory, check the spark plugs, says Honda; they're probably carbon-fouled. Installing a set of hotter running plugs and Honda attributes the trouble to the module misinterpreting the inputs from various sensors. Reprogramming the PCM with revised software should prevent further trouble.
In addition to the fix, some cases I have to adjust the valve clearance to the middle of its spec range when the engine is 'stone' cold. Even there was no complain about the performance or valves ticking noise and yes the valve clearances were off.
Edit: E mail me if you have more question or need more help. Time to open up the shop. Technicians are coming in. HTH
- Will starter from an automatic 2000 Honda civic LX fit on a automatic 2000 Honda civic HX? The lx is a 5 gear transmission and the hx is a CVT transmission. With the starter fit? Mine went out on my hx
- Help me! Code P2A00 Oxygen sensor circuit range/performance bank 1 Sensor 1 2008 honda Crv ex? I have an 2008 Honda crv Ex and this code came up "Code "P2A00" Oxygen sensor circuit range/performance bank 1 Sensor 1 i want to replace it myself because i know its simple and the dealer wants to charge me over $300 and i can do it for half the cost when i looked it, it has two sensors together one closer to the engine and the other a bit more behind it i don't know with of the two it is.
- I have a 99 honda civic si I did a compression test and suspect it has low compression because of misfire? So the first one came out as.180. Second one 180… Third piston 160… And the last final piston as…180 are my pistons good? Don't mean to sound like a rookie.
- Honda misfire codes 2001 civic, three of 4 cylinders and random misfire any idea? Car actually runs fairly good but I see the misfire come on while driving I checked compression, seems fine all cylinders new plugs, new air filter, cleaned throttle assembly checked by pulling spark plugs one time no dead cylinder gross check on injectors didn't see anything two cans of injector cleaner 1 can seafoam in gas tank changed oil any good suggestions?