Where is the O2 sensor after the cat converter?
If the catalytic converter is doing its job properly, the downstream O2 sensor, located AFTER the cat converter, should rarely switch between rich and lean. If it does toggle between rich and lean, the sweep should be fairly mild.
Can a catalytic converter go bad over time?
Although, modern catalytic converters are supposed to last the life of most vehicles, it could be there is some underlying problem if it has clogged. O2 Sensor Wiring – Over time, the oxygen sensor wiring can go bad. It is especially volatile since it is right next to the hot exhaust at all times.
What causes a cat converter to be killed?
Excess fuel, bad valve stem seals that leak oil into the combustion chamber, coolant leaks that send coolant into the exhaust stream—all of those engine problems can kill a cat converter. If you replace a converter without fixing the underlying problem, you’ll just have to replace it again.
Where is the VTEC system malfunction code p1259?
Re: VTEC System Malfunction code P1259 has appeared. (… Check your variable valve timing oil pressure switch, it’s located on the passanger side just before the intake manifold, also the solenoid may be dirty or bad. some people say to clean the screen but that requires removing the entire assembly where these two units are… Good luck
What causes a VTEC system to malfunction?
NOTE: While there are some exceptions, the general rule is that if the code sets at, or just above idling speeds, the fault is caused by a general electrical issue, while if the code sets above about 4000 RPM, the fault almost invariably involves insufficient oil pressure, or a failure of the VTEC oil pressure sensor. None found.
How to find the correct error code for VTEC?
To find the right cause of the error code, do the following: 1st Step: Use the PGM tested to check the freeze data of the vehicle, or snapshot data to determine when the code was set. If set at idle, then proceed to 2nd step. If set above 4,000 RPM, then proceed to 4th step.
Can a bad oil pressure switch cause VTEC system malfunction?
Low oil level can cause this as well as a bad oil pressure switch for VTEC control, possible VTEC solenoid. You can’t post conmments that contain an email address. An expert who has achieved level 1. An expert that has over 10 points. An expert whose answer got voted for 2 times.