DTC P0131 & DTC P0137: Notes

Code Definition

DTC P0131: Front Heated Oxygen Sensor Circuit Low Voltage
DTC P0137: Rear Heated Oxygen Sensor Circuit Low Voltage

NOTE: Before performing any diagnostic test, refer to WARNINGS, CAUTIONS and NOTES in DIAGNOSTIC TESTS .

NOTE: Testing individual components does not isolate shorts or opens. Perform all voltage tests using a Digital Volt-Ohmmeter Meter (DVOM) with a minimum 10-megohm input impedance, unless stated otherwise in test procedure. Use ohm to isolate wiring harness shorts or opens.