What is the P0134 error code? What is the O2 Sensor Circuit No Activity Detected Bank 1 Sensor 1 fault? How do I fix the P0134 fault code What are the causes and symptoms of the P0134 error code?
What is the P0134 fault code? What does it all mean?
The description is required to accompany the trouble code P0134 “Oxygen (O2) Sensor circuit No Activity Detected Bank 1, Sensor 1)” . This code is generated when your vehicle’s engine control module (PCM), fails to receive an upstream oxygen sensor signal (before the catalytic convert). “Bank 1”, indicates the side with number one cylinder. “Sensor 1”, the oxygen sensor located near the engine, is what comes before the catalytic.
O2 sensors measure the oxygen content of the exhaust. There are two types of O2 sensors: an upstream O2 sensor, which is the sensor before the catalytic convert, and a downstream O2 sensing (the sensor after it). The upstream sensor “sensor 1” and the downstream sensor “sensor 2”.
The signal from the upstream sensor is used by the PCM to calculate fuel control, and the signal coming from the downstream sensor is used to determine the efficiency.
All modern vehicles have oxygen sensors that are heated (HO2S). These sensors are equipped with a PCM-activated heating component that quickly reaches operating temperature once the engine is cold for the first time. Similar to glow plugs
The signal from O2 sensors is ignored by the PCM until they warm up.
The PCM records the time it takes for oxygen sensor to warm up. If the process takes longer that the PCM anticipates, and the sensor does not respond, the module will consider the sensor disabled or open. It turns on the checkengine light and saves the P0134 error code in its memory.
What are the Possible Reasons for the P0134 Fault code?
- – Defective O2 sensor
- Circuit to fix a defective O2 sensor heater
- – Broken or disconnected cables
- – Use loose connector connections to prevent corrosion
- – Thermostat circuit fuse blown
- Leakage of engine vacuum
- – Holes in exhaust system
- – Defective engine control module
What are the symptoms of P0134 Trouble code?
- – Illumination at the check engine lights
- Engine misfire or stalling
- – Acceleration sudden accelerations – Hesitation or decrease in engine power
- – Idle fluctuation
- – The exhaust smells of black smoke and rotten eggs
- – Increased fuel consumption
- – Increased Emission Values
How do I fix the P0134 fault code?
- – A road test must be performed and the code must first be reset. The code must return if the vehicle reaches normal operating temperature.
- If the code does not return, inspect the wiring and connectors connecting to the O2 sensor or ground. You should correct any wear, corrosion, broken connections, loose connections, or damage. After the fix has been made, the code should then be cleared and tested again.
- – Fuses for the oxygen sensor circuit are found on some cars. Although it is rare, it is possible for a fuse to blow.
- It is important to verify that the O2 sensor receives the proper voltage signal from PCM.
- If none of these solutions work, it is time to replace the O2 sensor.
- If the code returns after replacing the sensor, it is worth checking the exhaust system. Exhaust pipe corrosion and holes can cause problems with the O2 sensor’s operation.
- – This is the last possible scenario. The control module may be faulty and must be replaced.
How Serious Is the P0134 Fault Code
Although code P0134 doesn’t prevent the vehicle from starting it may cause the engine to lose power. It is possible to damage the catalytic convertor if you ignore the problem for too long. This fault code has the greatest effect on fuel consumption.
