What does it mean when a O2 sensor says no activity?
When the power control module (PCM) detects that the oxygen sensor millivolt at a standstill, and not functioning properly, this will cause the P0134 trouble code. This trouble code can be caused by the following: Faulty heater circuit. A wire that is broken or disconnected from the oxygen sensor.
What does 02s mean on a code reader?
Code P0134 is triggered when your vehicle’s O2 sensor (bank 1, sensor 1) is malfunctioning. The Engine Control Module (ECM) detects that the Oxygen (O2) sensor is at a standstill and is not accurately reading the amount of oxygen in the exhaust.
Can a faulty oxygen sensor cause a VW Beetle to run poorly?
A faulty oxygen sensor will cause your Bug to run poorly and also cause a decrease in fuel economy. Most repair manuals state that you will need a special socket for removal, but since the sensor is mounted up on a boss, a simple box wrench will suffice. Visit your local auto parts and pick up a new sensor.
Where are the O2 sensors on a Volkswagen Golf?
Sensor 1- Sensor 1 would be the first O2 sensor in the line of sensors starting with the exhaust manifold and making its way back to the exhaust pipe. An Oxygen sensor that is between the catalytic converter and the engine is known as an “upstream” sensor. Oxygen sensors after the catalytic converter are “downstream sensors”.
Why is the rear O2 sensor not active?
Normally this sensor will switch between high and low voltage at a noticeably slower rate than the front sensor. This is normal. If the signal received from rear (#2) O2 sensor indicates that the voltage has “stuck” between .425V to .474 V, the PCM determines this sensor is inactive and this code will set.
Why does the Check Engine light come on on a Volkswagen Beetle?
Oxygen sensors can change the way that your Beetle’s engine runs. Most of the time, the check engine light will come on. It’s a good thing that the check engine light would come on, as there is more than one oxygen sensor, and they can be difficult to get to and test.