P0134 - O2 SENSOR CIRCUIT NO ACTIVITY DETECTED (BANK 1 SENSOR 1)

The O2 Oxygen Sensor front (O2 1) is located in the exhaust manifold and its function is to detect the amount of oxygen in the exhaust gas, this in comparison with the outside air. This sensor has a tube made of zirconium ceramic, which is closed at one end. This material helps the voltage generated is approximately 1V in richer conditions and 0V in the lowest.

The PCM (Powertrain Control Module) generates a reference voltage of ± 450 MV in the signal circuit of the oxygen sensor. When the Powertrain Control Module (PCM) determines that the time necessary for the sensor to warm up is greater than 1 minute or that the voltage is not within 391-49 mV, this interprets it to be that the sensor is inactive or open and the DTC code P0134 is established.

• The Check Engine light is on.
• The engine does not work correctly.
• It can be seen that the smoke that comes out of the exhaust is black.
• There is low fuel efficiency.

A fault code P0134 OBD2 may have one or more of the following problems:

• There are holes in the exhaust.
• A fuse in the Oxygen Sensor circuit may be faulty or even burned.
• Some Oxygen Sensor cable or connector may be wearing.
• The Oxygen Sensor (O2) may be defective.

To solve the diagnostic code P0134 you can check the following components:

• Check that the exhaust pipe has no holes, repair if necessary.
• Check the cable system and its Oxygen Sensor connectors (O2). Replace if necessary.
• Make sure a fuse is not burned. Change it if you find any inconsistency.
• Replaces the front Oxygen Sensor (O2 1).