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 1,000 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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  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: Main relay, EMS1 fuses, and EMS2 fuses are missing. Do I need these parts?

Hi there. The codes are coming up for the camshaft position sensor, Oxygen sensor, EGR valve, and evaporative system not working. The fuses for EMS1 and EMS2 and the main relay vary depending on what Aveo model you have. If...

Q: ABS actuators replaced a 2nd time in less than year

Hello. This is a common issue with this vehicle. The only way properly correct it would be to replace the hydraulic unit with a dealer unit and flush out the brake fluid. If this is done then it will last...

Q: When I get up to 80km and I have my foot on the accelerator there is a wine but when I take my foot of my accelerator it goes away

Hello - wow, a Nissan from "down-under"! Given that you only hear the whine when you are loading the driveline, I believe you have worn ring and pinion gears or bearings in the rear differential (or possibly the front if...

Related articles

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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.