Skip the auto shop - Our mechanics make house calls

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?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
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: Whining and buzzing noise coming from head unit - 1997 Lexus LX450

I would check with the Alpine distributor who sold you this unit, and discuss your situation with them. They may have included relevant comments on mounting the head unit with the unit itself, but in any case, their Customer Service...

Q: P0135 O2 sensor heater circuit bank 1 sensor 1

Hello. P0135 is the code for an oxygen sensor heater circuit malfunction, bank 1 sensor 1. If bank 1 sensor 1 oxygen sensor has been replaced, then it may be possible that the issue is with the wiring or connector...

Q: Braking car quits running

A few different faults can cause the vehicle to die when the brakes are pressed. The most common would be a vacuum leak or a brake booster failure. Either of these can pull too much air and can cause the...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...