I am getting a P1135 code on my 2005 Toyota Camry.I have replaced the A/F sensor first with a Bosch then with a Denso. I am still getting the same trouble code almost immediately after starting the car up. I checked the connector for power at the connector and I have power at the lower right male connector. What is my next step?
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What size engine?– Move More Comments Link To TopJun 19, 2015 at 20:42
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2Also you list the code as a P1135 which is an O2 Sensor code, but you said you replaced the Air Flow sensor. Also P1135 doesn't come up as a valid code for this make, model, year.– Move More Comments Link To TopJun 19, 2015 at 20:47
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2if you get an engine code, don't just assume the sensor is bad, maybe it's working fine but the sensory input (emissions in this case) is what trips the threshold.– amphibientJun 19, 2015 at 20:54
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no, air flow is measure by a MAF sensor. an A/F sensor is the Air/fuel sensor. different from an O2 sensor, but serves the same purpose. i think a p1135 is usually a heater circuit code. could be a wiring issue or bad/wrong sensor. double check the part number on the new sensor– user4546Jun 20, 2015 at 0:59
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1 Answer
P1135: AFR Sensor Heater Circuit Malfunction Bank 1 Sensor 1
As discovered, the malfunction doesn't necessarily have to be in the sensor itself.
Possible causes for a P1135 code include:
Faulty Air-Fuel Ratio (A/F) Sensor Bank 1 Sensor 1(already ruled out by replacement)- Air-Fuel Ratio (A/F) Sensor Bank 1 Sensor 1 harness is open or shorted
- Air-Fuel Ratio (A/F) Sensor Bank 1 Sensor 1 circuit poor electrical connection
- Faulty Engine Control Module (ECM)
A faulty ECM is possible, but not probable, so the CEL is likely due to a break in the heater circuit which you will need to trace.
A very nice video by Schrodinger's Box shows him diagnose a similar problem on a Nissan Maxima.
