What is the P0146 fault number? What is the O2 Sensor Circuit No Activity Detected Bank 1 Sensor 3 Failure Description? How do I fix the P0146 fault code What are the causes of P0146 fault code symptoms?
What is the P0146 fault code? What does it signify?
The powertrain control module (PCM), determines that the oxygen sensor has experienced a lesser than normal voltage variation (more than 7 seconds) during a time frame (not having a voltage increase between 410-490mV). The code’s description states that “Bank 1” refers to the bank containing engine’s number 1 cylinder. “Sensor 3,” refers the O2 sensor closest to the engine, after a catalytic convert.
This sensor’s primary function is to monitor the catalytic converter’s efficiency. PCM uses pre-catalyst data and post-catalyst data from oxygen sensors to assess the effectiveness of the catalyst. The voltage variations sent signals by the O2 sensors to the PCM. The voltage will drop if the exhaust is not properly filtered. It will rise if it is well filtered.
When the PCM detects an error code P0146, it means that the oxygen sensor (bank 1 sensor 3) isn’t responding as it should or that voltage changes are slow than normal over a time period.
P0146 fault codes can be found on a variety of vehicles, including the Blazer, Blazer, Blazer, Blazer, Jeep, Ford and Volkswagen.
What causes the P0146 Fault code?
This error code could be triggered by:
- – Defective oxygen sensor (bank 1 sensor 3)
- – Wiring issues with the O2 sensor circuit (short and open wires touching the exhaust)
- – Defective or dirty mass airflow (MAF) sensor
- – Defective PCM
What are the symptoms of the P0146 Fault code?
These symptoms may be present if you own a vehicle that has the code P0146.
- – Illumination and control of the check engine light
- Fuel consumption could increase
- – Idle irregularity
- Low engine performance
- – A rise in emission values
Because they don’t directly affect fuel delivery, but monitor the effectiveness of the catalyst, post-catalyst oxygen sensors don’t cause any issues with driveability. Fuel delivery may be affected if the mass-air flow sensor is the cause. This can lead to various problems with engine performance.
How do I fix the P0146 fault code?
- – Cleaning the mass flow sensor
- – Test the mass air flow sensor by turning the engine on and running. If it is not working, replace it.
- – Replace or repair wiring to O2 sensor, bank 1 sensor 3.
- – Test the O2 sensor and replace it if it is defective (bank 1 sensor 3).
How Serious Is the P0146 Fault Code
This code could be set because of a dirty or faulty mass air flow sensor that causes false readings. This sensor, along with the O2 sensors, can cause the PCM miscalculation of the air entering an engine. You may experience driving difficulties in such cases. Engine damage can be prevented by addressing the issue quickly.
