2001 Honda - New Catalytics & O2 sensors -- new 0420/1739/1456

What about an Oxygen Sensor?

They get replaced on all vehicles at 100,000 miles
or if they fail, before that

Need professional tools to test them & the rest of the vehicles
on board systems

Get into a shop & have it checked out

Your not being told anything & gender has nothing to do with it

You bought a vehicle that was bought new & never worked on

As mistake--YES

Most vehicles are driven only & abused

95% of your vehicle issues can be resolved by doing the
required Preventative Maintenance never done,nothing new there

New Fluids-Brake,Motor Oil,Power Steering,Trans
New Spark Plug
New Ignition Coils
New Oxygen Sensors
New Gas Filter

That is just some of what should have been done on all vehicles
several times since 2004

Your car uses heated oxygen sensors. Once the key is turned on the heating element in the sensor will start heating up. If you leave the key OFF overnight and the sensor is warmer than the surrounding metal, then that would indicate a problem. Running the engine even for a just a minute will heat the exhaust system and the sensor quickly.

Oxygen sensors can maintain their "new" look for a long time. I have romved sensors that are years old and look new on the oustide but have failed. Looking new or old is not a good indication of failure.

I dont see any bulletins on the sensor having issues. the yaw sensor also referred to as roll rate sensor is located under the drivers seat. an option for you might be to replace sensor yourself and just have dealer perform the setup procedure.to replace you will need to remove the drivers seat to gain access and be very careful not to drop new sensor. might get lucky and install and light goes off with no further action,but if not most dealers will charge an hour labor to program/setup

There is are upstream and downstream O2 sensors. 1 or 2 (upstream) before the catalytic converter which sends signals for closed loop fuel control and OBD II monitoring, and 1 (downstream) after the catalytic converter, which is used to monitor the catalytic converter operation. The PCM monitors the signal from each O2 sensor.

You don't necessarily need a new converter. I had this code on my 2006 Odyssey at around 150,000 miles for both the front and rear converter and only needed new downstream O2 sensors ($40 for the back, $60 for the front). This is why my car never sees the inside of a dealership shop, they're happy to replace your converter for >$1000 without even looking at the problem. A little troubleshooting goes a long way here. I grabbed an engine code reader from the local auto parts store and read the O2 sensors with the engine running and noticed the voltages on them were erratic, and they shouldn't be. Mine were reading ~ 0.8 volts, then would jump down to < 0.1 volts for a couple readings, then back up to 0.8. The downstream sensor readings should be fairly stable.

what is the code that turned the light back on?????? if its a P0420, the cat is not good enough. you may need one good enough for California or a better quality converter.

No, no need to go the expense.

the 6 cylinder engine wil have 4 sensors

HI .YOU NEED TO REPLACE THE CATAYST ON BACK 1. ONLY THE REAR CATALYTC OK