P0141 P0161 O2 Sensor Heater Circuit "Chevy Truck 5.3L 6.0L"

Diagnose check engine. Found light stored code p0141 for O2 sensor heater circuit bank 1 sensor 2. Drivers side after the catalytic converter.

Checked both fuses and the under hood fuse compartment for the O2 sensor heaters and both checked good. Accessed bank 2 O2 sensor after the cat and found 02 sensor wiring had been rubbing on front drive shaft on the O2 sensor side. Checked the vehicle side for power to O2 sensor heater and tested good. O2 sensor will need to be replaced due to wiring damage on this Chevy Silverado.
2004 Express 1500 5.3
2004 Silverado 2500 HD 6.0
2004 Silverado 3500 6.0
2004 Sierra 1500 5.3
2004 Sierra 2500 HD 6.0
Customer Concern: Setting trouble codes P0141 and P0161.
Average Reported Mileage: 106957
Tests/Procedures: 1. With a cold engine, turn the key on engine off and monitor O2 voltage. Within 2 minutes, the voltage should drop to about 150 mV.

2. Verify there is 12 volts on the Pink wires to both O2's. If no voltage check the O2B fuse for blown.

3. If the fuse is blown check wiring to the sensor for chafing on the transmission or transfer case.
Tech Tips: Heater Current Test
• The PCM detects that the affected HO2S Heater current parameter is more than 1.375 amps or less than 0.25 amps.
• The above condition is met for 10 seconds.
Heater Resistance Test
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Видео P0141 P0161 O2 Sensor Heater Circuit "Chevy Truck 5.3L 6.0L" канала The Flat Rate Mechanic