my 2000 rx hase 200k on it and its throwing these codes
where to start?

p0300 Random Misfire,
p0301 Cylinder #1 Misfire,
p0302 Cylinder #2 Misfire,
p0303 Cylinder #3 Misfire,
p0304 Cylinder #4 Misfire,
p0305 Cylinder #5 Misfire,
p0306 Cylinder #6 Misfire,
p0325 Knock Sensor Circuit Malfunction,
p0330 Knock Sensor 2 Circuit Malfunction (Bank 2),
p1130 Air/Fuel Ratio Sensor Circuit Range/Performance Malfunction (Bank 1 Sensor 1),
p1135 Air/Fuel Ratio Sensor Heater Circuit Malfunction (Bank 1 Sensor 1),
p1150 Air/Fuel Ratio Sensor Circuit Range/Performance Malfunction (Bank 2 Sensor 1),
p1351 VVT Sensor Circuit Malfunction (Bank 2),
p1354 VVT System Malfunction (Bank 2)
p0171 System to lean (bank1)

 

Reset and as soon as a code pops up read it and start there.

 

ill do that tomorrow and let you know.

 

One fault (eg bad coil) can sometimes cause a number of codes. I had one bad coil which was throwing 5 "bad coil" codes. I have a cheap code reader - the dealer has the Toyota Techstream reader which may be able to discriminate/diagnose better.

Clear them out and see what pops back up. If you have a bad coil, the engine will be misfiring badly. If you can't feel it misfiring (shaking/vibrating/ loss of power), you probably don't have any bad coils.

 

ok cleared them and only p1354 comes up for now

 

Very possibly VVT sensor.

 

correct sir it was the VVT-I control valve

 

now i get code 1130 1135 0125 new o2 sensor on the way

 

o2 is in now i just have p0325 Knock Sensor Circuit Malfunction,
p0330 Knock Sensor 2 Circuit Malfunction (Bank 2)

need to find the resistance spec of the knock sensors and harness so i can test them. anyone know?

 

x2

Salim

 

i cleared the codes every day. today i put in the new o2 and cleared the codes after 8 mines of driving the p0325 and p0330 codes came up.

 

Have you reset the ECU? It's a good idea to "introduce" new parts with a reboot.

 

i cleared the codes but i didnt disconnect the battery. lol maybe i should have done that.

the battery is disconnected now cause i removed the intake to get to the knock sensors and harness. just waiting for someone to let me know how to test the harness and sensors so i can order what new parts i need and put her back together.

 

come to think of it i did disconnected the battery after i put in the vvti control valve but not after the O2 sensor.

 

ok put the new knock sensors and harness in. only took me about 1:20 start to finish. now i have a p1150p code but i pulled the batt cable. ill drive it tomorrow to see if the pending code comes back.