Pussy_magnet_00

p0132 02 Sensor Circuit High Volts (Bank 1 Sensor 1)

P0420 Catalyst Efficiency Below Threshold (bank 1)

P1259 Manufacturer Control Fuel Air Metering (i was told it is actually a v-tec malfuction)

To try and fix these codes that keep coming up, ive changed spark plugs, ran fuel system cleaner, cleaned V-tec solenoid. My V-tec is still now activating, it wont let me rev any higher than 6,800. I was told P0132 is the 02 sensor closest to the driver and needs to be changed. p0420 could be a bad cat. or the sensor. and p1259 has me stumped. A friend of mine had the dealership change the whole throttle body on his RSX when he got that error (guarantee covered it) but i think it could be fix cheaper and easier i just dont know what else to do. I erase the codes and they come back up, engine stays in limp mode. i researched and couldnt find a clear answer of how to fix it. any advice is appreciated. thanks.

Pussy_magnet_00

by the way, its a 2000 prelude base 5 speed, just had oil changed and had the trouble codes before the change, 75k miles.

JonGP4

start with the O2 sensor, if that doesn't fix all of the above maybe the map sensor? that is located on the TB i believe.

Pussy_magnet_00

got under the car to take another look, the cat is an aftermerket high flow and looks new (dont know when it was put in since i bought the car used). im ordering the oxygen sensors off ebay cuz pep boys wants $70 for them. ill let u know if anything. Thanks

Pussy_magnet_00

found the problem with the vtec, just some loose wires. still got those other 2 errors though, already ordered the 02 sensors, ill let u know how it goes.

FarmerJim

Where were the loose wires? I keep getting the P1259 code also. Thanks

Pussy_magnet_00

it seems that the previous owner had a comp. modification and when he/she took it off didnt put the wires that were cut correctly in a way that they wont become undone.

I found a diagram of the wiring tell me which wires were the ones for the vtec control and i check the cables that were coming out of the ecu that it is under the passenger floorboard and those 2 wires were undone.

if its not the wires check other things like ur vtec solenoid that might be clogged and oil levels because they could cause ur vtec to not activate and cause that code.