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P0031 Diagnostic Trouble Code Discussion for June 2019

Air Fuel Sensor (Bank 1 Sensor 1) Heater Control Circuit Low Voltage

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Trouble Ticket Help Requests for DTC P0031
Help Request Posted
2011 Toyota 4Runner SR5 4.0L MIL Lamp on VIN: JTEZU5JR6B
P0031: Air Fuel Sensor Bank 1 Sensor 1 Heater Control Circuit Low - Manual and Automatic Transmission. ... on, said a friend installed new o2 snsr b1s1 but the same code came back, p0031, on inspection found that the new snsr was installed on driver side(bank 2). p0031 in b1s1 passenger side, removed b1s1 snsr ck ohms pins 1/2 found it was open, replaced, ...
June 10, 2019
2005 Jeep Grand Cherokee Limited 4.7L MIL Lamp on VIN: 1J8HS58N45
P0031: Heated Oxygen Sensor (Bank 1 Sensor 1) Heater Circuit Low Voltage. All four O2 sensor heater circuits flagged a code at the same time. But the MIL has been on for the last year with an EGR code the cust declined to fix. The MIL comes on immediately after the codes are erased. Checked resistance to ground and V drop in com...
June 25, 2019