Question about 2001 Toyota Camry

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Engine light comes on with code p1135 control fuel air metering. how do i fix this?

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P1135: A/F Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)

Your first O2 sensor is not getting heated either because the wiring to the sensor is bad or the heater inside the sensor is bad. If you have a four cylinder this would be the only O2 sensor you have before the catalyst. I would just replace the sensor, clear the code, and see if it comes back.

Posted on Nov 12, 2010

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Posted on Jan 02, 2017

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


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.

Mar 26, 2011 | Toyota Pickup Cars & Trucks

3 Answers

2002 toyota le 29,780 Miles check light on during driving code p1135


Code p1135 is a code for an Air/Fuel sensor (oxygen sensor). Bank 1 sensor 1. IT comes up when their is a problem with air/fuel mixture in the engine. It would be anything from a blocked air cleaner, faulty or fouled spark plugs to a blocked exhaust pipe/catalytic convertor. I would get these checked out, and if they are all fine the sensor its self or sensor circuit may have failed, requireing replacement. With your low miles, hopefully this maybe covered under warranty if it is the sensor.

Jan 21, 2011 | 2002 Toyota Camry

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

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

I took my Toyota to autozone because my check


oxygen sensor bank 2 sensor 1
do you have a 6 cylinders engine?
this sensor is on the rear bank ( next to the fire wall ) before the cat

Mar 06, 2010 | 2002 Toyota Highlander

1 Answer

My check engine light is on and I received code P1135, Manufacturer Control Fuel Air Metering is the defintion of the code. What parts do I need to get to fix problem myself?


Not sure where you got that definition for that code but this is what it is and means with possible causes for whichever motor you have:

Trouble Code: P1135 (2.4L L4 VIN - Auto)
A/F Sensor-11 (Bank 1 Sensor 1) Heater Circuit Malfunction Print this code dataprint_icon_codes.gif
Number of Trips to Set Code: 2
OBD II Monitor Type: CCM Details
Indicators: MIL Details
Trouble Code Conditions:
Engine started, engine running, and the PCM detected the A/F Sensor-11 (A/FS-11) heater current was less than 0.25A, or that it was more than 8.0A at anytime during the CCM test.

Possible Causes:
  • A/F sensor heater circuit or ground circuit is open
  • A/F sensor heater power circuit is open
  • A/F sensor heater is damaged or has failed
  • PCM has failed

2001 Toyota Highlander - I4 - P1135, P1155


Trouble Code: P1135 (3.0L V6 VIN - Auto)
A/F Sensor-11 (Bank 1 Sensor 1) Heater Circuit Malfunction Print this code dataprint_icon_codes.gif
Number of Trips to Set Code: 2
OBD II Monitor Type: CCM Details
Indicators: MIL Details
Trouble Code Conditions:
Engine started, engine running, and the PCM detected the A/F Sensor-11 (A/FS-11) heater current was less than 0.25A, or that it was more than 8.0A at anytime during the CCM test.

Possible Causes:
  • A/F sensor heater circuit or ground circuit is open
  • A/F sensor heater power circuit is open
  • A/F sensor heater is damaged or has failed
  • PCM has failed

2001 Toyota Highlander - V6 - P1135

Oct 21, 2009 | 2001 Toyota Highlander

3 Answers

Check engine light is on


P1135 bank 1 sensor 1 is your air/fuel sensor upstream (between manifold and engine on the passenger side). It cost about $179 at most reputable auto parts store. You'll want to run the engine for two minutes before attempting to take off the nuts also be careful not to touch the manifold as it will be hot (use a 12mm box end wrench and or a pair of needle nose vise grips or lastly a dremel tool to grind them off). unplug the old sensor plug the new in and install. pull your positive cable off your battery for 5 minutes and then re-connect. your check engine light should be gone. allow your truck to idle for a few minutes and then take a drive. good luck!

Jun 04, 2009 | 2001 Toyota Tacoma

1 Answer

Engine ligth & VSC light both on. Went to AutoZone & they test computer that showed a P1135 problem which is the Air/Fuel Sensor. What does that have to do with VSC lights on.????


When the check engine light comes on, the VSC light come on along with it by default.  I don't exactly know why, it just does.  Fix the problem with the air/fuel sensor and reconnect the battery, should take care of the problem.

Mar 07, 2009 | 2001 Toyota Avalon

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