2002 Toyota Camry Code: P1135 Started to.

Tiny
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  • MEMBER
  • 2002 TOYOTA CAMRY
  • 154,000 MILES
2002 Toyota Camry Code: P1135
Started to eat more and more gas, plus engine started to idle rough as well. Please help!
Friday, March 8th, 2013 AT 2:26 AM

1 Reply

Tiny
ASEMASTER6371
  • EXPERT
P1135 - A/F Sensor Heater Circuit Malfunction (BANK1 SENSOR1)

CIRCUIT DESCRIPTION
To obtain a high purification rate of the CO, HC and NOx components of the exhaust gas, a three-way catalytic converter is used. For the most efficient use of the three-way catalytic converter, the air-fuel ratio must be precisely controlled so that it is always close to the stoichiometric air-fuel ratio.

The A/F sensor has the characteristic that it provides output voltage* being approximately proportional to the existing air-fuel ratio. The A/F sensor output voltage* is used to provide feedback for the ECM to control the air-fuel ratio.

By the A/F sensor output, the ECM can determine the deviation amount from the stoichiometric air-fuel ratio and control the proper injection time immediately. If the A/F sensor is out of order, ECM is unable to perform the accurate air-fuel ratio control.

The A/F sensor is equipped with a heater which heats the zirconia element. The heater is controlled by the ECM. When the intake air volume is low (the temperature of the exhaust gas is low), the current flows to the heater to heat the sensor for the accurate oxygen concentration detection.

This is what has to be checked for the code

Roy
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Friday, March 8th, 2013 AT 2:30 AM

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