Hi, I have DTC p0031 and went through 2 new sensors but they make my engine surge. no check engine light came on. thank you for your input.
Aug 2, 2020 at 11:45 AM
Air/fuel ratio sensor, code p0031
2003 TOYOTA TUNDRA
BAOLONG NGUYEN
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Hi,
What brand sensor are you replacing it with? I'm asking simply because people are getting parts from online that just don't work properly.
IF that isn't the case, we need to first check the sensor itself. Here are the directions for doing it:
____________________________________
2003 Toyota Truck Tundra 2WD V6-3.4L (5VZ-FE)
Air-Fuel Ratio (A/F) Sensor
Vehicle Power-train Management Sensors and Switches - Power-train Management Sensors and Switches - Computers and Control Systems Oxygen Sensor Testing and Inspection Component Tests and General Diagnostics Air-Fuel Ratio (A/F) Sensor
AIR-FUEL RATIO (A/F) SENSOR
INSPECTION
1. INSPECT HEATER RESISTANCE OF A/F SENSOR (Bank 1 Sensor 1)
a. Disconnect the sensor connector.
pic 1
b. Using an ohmmeter, measure the resistance between terminals +B and HT.
pic 2
If the resistance is not as specified, replace the sensor.
Torque: 20 N.m (200 kgf.cm, 14 ft.lbf)
c. Reconnect the sensor connector
2. INSPECT OPERATION OF A/F SENSOR
_________________________________________
If the sensor meets the manufacturer's specs, then I need to know if you have a live data scanner. I will need to know the short term fuel trims.
Let me know what you find or if you have other questions.
Joe
What brand sensor are you replacing it with? I'm asking simply because people are getting parts from online that just don't work properly.
IF that isn't the case, we need to first check the sensor itself. Here are the directions for doing it:
____________________________________
2003 Toyota Truck Tundra 2WD V6-3.4L (5VZ-FE)
Air-Fuel Ratio (A/F) Sensor
Vehicle Power-train Management Sensors and Switches - Power-train Management Sensors and Switches - Computers and Control Systems Oxygen Sensor Testing and Inspection Component Tests and General Diagnostics Air-Fuel Ratio (A/F) Sensor
AIR-FUEL RATIO (A/F) SENSOR
INSPECTION
1. INSPECT HEATER RESISTANCE OF A/F SENSOR (Bank 1 Sensor 1)
a. Disconnect the sensor connector.
pic 1
b. Using an ohmmeter, measure the resistance between terminals +B and HT.
pic 2
If the resistance is not as specified, replace the sensor.
Torque: 20 N.m (200 kgf.cm, 14 ft.lbf)
c. Reconnect the sensor connector
2. INSPECT OPERATION OF A/F SENSOR
_________________________________________
If the sensor meets the manufacturer's specs, then I need to know if you have a live data scanner. I will need to know the short term fuel trims.
Let me know what you find or if you have other questions.
Joe
Images (Click to enlarge)
Aug 2, 2020 at 7:41 PM