Question about 2000 Chevrolet 3500
If your O2 sensors are malfunctioning, the main symptom would be that the Check Engine light will come on. On some vehicles, an O2 sensor circuit shorted to ground can cause a no-start problem.
If the "Check Engine" or "Service Engine Soon" light is on and there is a code for the O2 sensors, I would like to also advise you that many O2 sensor codes are not caused by the O2 sensors themselves. In many cases, the O2 sensors are only REPORTING the problem. for example, a code P0171 "Oxygen Sensor Lean" code is rarely ever caused by the O2 sensor. It is usually caused by a vacuum leak or a failed Mass Airflow sensor (MAF) or Manifold Absolute Pressure sensor (MAP) or a bad fuel injector. In these cases, repairing the real reason that the engine is running lean will fix the O2 Sensor code without replacing the O2 sensor.
Posted on Mar 12, 2011
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Posted on Jan 02, 2017
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Removal & Installation
WARNING When disconnecting the sensor electrical connector, do not pull directly on wire going into sensor.
NOTE Allow the O2 Sensor to cool down before conducting the test. The O2 Sensor voltage should stabilize at 5.0 volts. Raising the hood may help in reducing under hood temps quicker.
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P0141....O2 Sensor Heater Circuit (Bank 1 Sensor 2)
P0142....O2 Sensor Circuit Malfunction (Bank 1 Sensor 3)
P0143....O2 Sensor Circuit Low Voltage (Bank 1 Sensor 3)
P0144....O2 Sensor Circuit High Voltage (Bank 1 Sensor 3)
P0145....O2 Sensor Circuit Slow Response (Bank 1 Sensor 3)
P0146....O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 3)
P0147....O2 Sensor Heater Circuit (Bank 1 Sensor 3)
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