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I have a p1135 code does that mean it the o2 sensor cause i have change the mass air sensor

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Code P1135 is a vehicle specific code for selected Toyota vehicles - it really helps to know what car you are working on...Year, Make, Model, Engine Size, Automatic or Manual Transmission, etc. There may be Technical Service Bulletins that apply to your vehicle that cover things like reprogramming the engine controller to correct this code, etc. Nobody can give you that information if they don't know what kind of vehicle we are talking about.

In general, the code description for code P1135 is "Air Fuel Ratio Sensor Circuit (California Emissions )"
The possible causes are
1. Open or shorted Air Fuel Ratio Sensor (AF) circuit
2. Faulty AF sensor
3 AF sensor heater or heater circuit shorted or open
4. Engine Control Module (ECM) Fault

The Mass Airflow Sensor (MAF) cannot cause this code - this is a "CIRCUIT" code, not a not a "LEAN" or "RICH" Oxygen Sensor (or AF Sensor) code. The MAF can only cause lean or rich codes.

Most of the time, this code is caused by the sensor itself, however, as I mentioned earlier, there are Technical Service Bulletins for several Toyotas that involve reprogramming of the Engine Computer.

Posted on Mar 26, 2011

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CODE P1135 HEATED OXYGEN SENSOR HO2S LH FRONT HEATER CIRCUIT MALFUNCTION.

Posted on Mar 26, 2011

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I have a 2004 lincoln ls that had a bad cat converter which the ford dealer changed out. ( Which was still under warranty 8 80) Now the o2 sensor and mass air sensor was bad. I changed both. But still have...


First the converter should not have failed until
it was at least 12 years old

The cause of the failure had to be corrected first

The front 2 --O2 Sensors get changed at 100,000
miles or before if they fail

When someone says they changed something,
I take that as meaning, you did it yourself without
any system knowledge or testing,thus you still have issues

Jun 06, 2011 | Lincoln LS Cars & Trucks

2 Answers

P1135 error code


The code your showing in a faulty o2 sensor, bank 1, sensor 1. Its the sensor between the exhaust manifold and the catylitic converter. Can be difficult to change. If your doing it yourself, I suggest spraying it with WD-40, or PB Blaster for a while before attempting to take it out. Hope this helped, let me know!

Apr 25, 2011 | 2001 Toyota Sienna

2 Answers

Computer analysis showed these codes... P0330 P1133 P1135 P1346 P1349 P1351 P1354. can anyone tell me what each of these mean?


P0330 Knock Sensor 2 Circuit (Bank 2)
P1133 Air/Fuel Ratio Sensor Circuit Response Malfunction (Bank 1, Sensor 1)
P1135 Air/Fuel Ratio Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)
P1346 VVT Sensor Range/Performance Problem (Bank 1)
P1349 VVT System Malfunction (Bank 1)
P1351 Variable Valve Timing / CMP Sensor Range / Performance
P1354 Variable Valve Timing System Fault

NOTE:Variable Valve Timing (VVT) sensor is also known as camshaft position sensor.
The Variable Valve Timing (VVT) system controls intake valve timing in response to driving conditions.

Possible causes are:
  1. Incorrect valve timing P1346, P1349, P1351 & P1354
  2. Faulty oil control valve P1346, P1349, P1351 & P1354
  3. Faulty VVT controller assembly P1346, P1349, P1351 & P1354
  4. Faulty ECM All Codes
  5. Jumped timing belt All Codes
  6. Faulty Camshaft Position Sensor P1346, P1349, P1351 & P1354
  7. Faulty O2 Sensor (Bank 1, Sensor 1) P1133 & P1135

Apr 22, 2011 | 1999 Lexus ES 300

1 Answer

O2 malfunction P1135. Please what do i need to buy to replace ? Can I do this myself or will have to let an expert do it. i would be very grateful if you could tell me what EAXACTLY that I need to buy...


The P1135 code on your Toyota is Air fuel ratio sensor - heater circuit malfunction. Basically the problem there will be with the air/fuel ratio sensor (on other vehicles it is refered to as an O2 oxygen sensor), or the wiring/connectors leading to it. It could also be a problem with a fuse or relay on the heater circuit. Again, not a real difficult problem to solve.

just fixing the P1135 code will not cause the check engine light to stay off because there are other unrelated codes. If the code P1135 was causing the other problems then perhaps fixing that code would fix the others, but that's not the case here. The reality is you'll need to have all the problem areas looked at (IAT sensor, MAF sensor, Air/fuel ratio sensor) and repaired in order for your engine light to stay off. Normally if there are codes stored a vehicle cannot pass inspection. I would get a second opinion from another local mechanic as what you've been told may not be 100% correct.

Good luck.

Dec 05, 2010 | Toyota Highlander Cars & Trucks

2 Answers

Check engine light on reads p1135


On Toyota models the error code meansthe problem is as described below

P1135 Air/Fuel sensor heater circuit response (bank 1 sensor1).

It indicates the most common problem with your O2 sensor . Bank ! sensor indicates the upstream O2 sensor. It might be faulty and needs to be replaced.

Nov 15, 2010 | Toyota RAV4 Cars & Trucks

1 Answer

Error code P 1135. what part needs to be replaced?


P1135. Air/Fuel Sensor Heater Circuit Response. (Bank 1 Sensor 1).

The P1135 code on your Toyota is Air fuel ratio sensor - heater circuit malfunction. Basically the problem there will be with the air/fuel ratio sensor (on other vehicles it is refered to as an O2 oxygen sensor), or the wiring/connectors leading to it. It could also be a problem with a fuse or relay on the heater circuit. Again, not a real difficult problem to solve.

Now, to specifically answer your question. I'm not familiar with the inspections in New Jersey, however just fixing the P1135 code will not cause the check engine light to stay off because there are other unrelated codes. If the code P1135 was causing the other problems then perhaps fixing that code would fix the others, but that's not the case here. The reality is you'll need to have all the problem areas looked at (IAT sensor, MAF sensor, Air/fuel ratio sensor) and repaired in order for your engine light to stay off. Normally if there are codes stored a vehicle cannot pass inspection. I would get a second opinion from another local mechanic as what you've been told may not be 100% correct.

Good luck.

Oct 02, 2010 | 2001 Toyota Sienna

2 Answers

99 toyota camry has error messages p1133 & p1135. which sensors & where are they located? six cylinder engine.


These are both air fuel ratio sensors, These sensors are located in the exhaust manifolds, the front one (bank 2) is easy to get to, the one in the rear is more difficult, they require a special socket to remove and install. The O2 sensors are located behind the catalytic converter and are not the same as the A/F ratio sensors.Replacing the sensors is not what the codes are telling you.You could have a plugged air filter giving you diminished air intake. That's not a bad sensor. A mass air flow sensor could be reading bad and giving you a bad mix of fuel so that your O2 sensor reads a problem. Get it? Or the O2 sensors could be bad after all, probably not both though.

Apr 05, 2010 | 1999 Toyota Camry

2 Answers

2002 4runner. P1135 air/fuel metering. Waht does this mean?


hi i have the same problem with my 02 4runner with the code p1135 can someone plese tell me the part no for this code please...

Oct 05, 2009 | 2002 Toyota 4Runner

1 Answer

Check engine light came on.


P1135 means that your O2 sensor has gone bad. The O2 sensor on the Toyota's are called Air fuel sensor's. If you have a 4 cylinder engine, the O2 is on the exhaust down pipe before the catalytic converter, and if it's a V6 it the O2 sensor on the fire wall side along the down pipe from the exhaust manifold. (sensor 1, bank 1) Good luck and keep me posted, check the wire harness. The wire harness could have corroded or burnt from the exhaust, but most likely it's going to be a bad O2. Keep me posted ,be glad to help

Jun 08, 2009 | 2001 Toyota Camry

3 Answers

Getting code p1135 and p1155 on toyota rav4 2002


Here's what the codes mean:
P1135 Air/Fuel Sensor Heater Circuit Response (Bank 1 Sensor 1)
P1155 Air/Fuel Sensor Heater Circuit. (Bank 1 Sensor 2

This is mainly related to the oxygen sensors. It maybe the sensors themselves or an open wire going to te sensors. They are mainly located on the exhaust pipe. One before and on after the catalytic converter.

Apr 15, 2009 | 2002 Toyota RAV4

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