Q: Replaced oxygen sensors, but code P0135 still visible - 1996 Lexus LX450

asked by on

I replaced the oxygen sensors with new ones; however, the new ones are still showing the code (from the code reader) like the old sensors: P0135. I have checked the ECU and it is functioning as it should. Would you please tell me the next step of where I should look in order to fix this code problem. Thank you.

P0135 is a "heater circuit" malfunction in the O2 sensor. This is usually a fused circuit. Check your Owners Manual to verify that it is fused, then check that fuse to make sure it isn’t blown ("something" caused the old one to fail, may have taken the fuse out with it). If that fuse is OK, you may have a wiring issue to the O2 sensor. A professional mechanic, like a certified technician from YourMechanic, can diagnose, inspect the heater circuit and repair this problem at your home or office.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Replaced oxygen sensors, but code P0135 still visible - 1996 Lexus LX450

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: After part replacements, spark plugs do not work - 1996 Lexus LX450

If you have a Check Engine Light on, first check for those codes to determine what engine management thinks is going on. If no trouble code, check the ignition fuse behind the driver side kick panel (carpeted panel at foot...

Q: Getting code P0135

Hello. A P0135 code indicates that there is a malfunction of the oxygen sensor/heat circuit. This problem could cause the car to burn more gas and over time, cause damage to the catalytic converter. When the oxygen sensor is replaced...

Q: does driving a car at 4000RPM with a limit of 8000 rpm cause harm, after the car is at operating tempurature?

It should not harm your engine to run it at 4000 rpm. With this high of miles, however, I would not run it for an extended time at these speeds. Especially since it's an older engine.

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.