Code P0159 is a powertrain code that indicates a specific sensor in the exhaust system (bank 2 sensor 2) is not performing as it should. When an oxygen sensor modulates slowly, it is an indication it is bad. This sensor monitors the catalyst efficiency for emissions purposes.
What O2 sensor is bank 2 sensor 2?
Diagnostic Trouble Code (DTC) P0158 stands for O2 Sensor Circuit High Voltage (Bank 2, Sensor 2). The O2 sensor 2 is the downstream O2 sensor and it measures the amount of oxygen in the exhaust gases leaving the catalytic converter (cat).
What is code P0159?
OBD-II Code P0159 is defined as a O2 Sensor Circuit Slow Response. The purpose of the oxygen sensor is to measure the oxygen content in the exhaust gases after they leave the combustion process of the engine. This information is critical to the PCM’s ability to maintain efficient fuel economy.
What is code P0139?
P0139 is the OBD-II generic code indicating that the O2 sensor for bank 1 sensor 2 failed to have a voltage drop below . 2 volts for 7 seconds during a deceleration fuel cut off. This failure shows that the engine control module (ECM) has determined the sensor response is too slow.
How do I fix P0159 code?
What repairs can fix the P0159 code?
- The most common repair is the replacement of the indicated oxygen sensor (bank 2 sensor 2).
- Exhaust leaks must be repaired before any oxygen sensor is replaced.
- It is not uncommon to find damaged wiring in the oxygen sensor circuit that would need to be repaired.
Are bank 1 and bank 2 O2 sensors the same?
Bank 2 Sensor 1 is the first sensor closest to the engine. On Bank 2 means it is at the engine side with cylinders 2, 4, 6, 8, etc. Bank 2 Sensor 2 is the second sensor on the engine’s exhaust pipe, usually behind the catalytic converter.
Where is the upstream O2 sensor located?
The upstream oxygen sensor is located before the catalytic converter. This measures the level of pollutants coming directly from the engine. It also senses any raw, unburned fuel coming from the combustion chambers.
Is Bank 1 sensor 1 Left or right?
Bank 1 Sensor 1 means Upstream Right/Rear; Bank 2 Sensor 2 means Downstream Left/Front.
What is a bank 2 sensor?
Bank Two is the passenger side. Sensor 1 on Corvettes is always the sensor that is closest to the exhaust port of the engine. Bank Two is post catalytic converter. Bank 1 Sensor 1 – Driver side before converter (front) Bank 1 Sensor 2 – Driver side after converter (rear)
What causes oxygen sensor slow response?
If the oxygen sensor is contaminated, the most common codes are P0139 to P0153 for oxygen sensor circuit slow response. These codes are set when the engine management system sees a lower than expected signal voltage, or the sensor is not switching from rich to lean.
What does O2 sensor delayed response mean?
It means that your vehicle’s powertrain control module (PCM) has detected a delayed response time from the upstream oxygen sensor on Bank 1. Usually, any issue with the upstream oxygen sensor’s function can cause a decrease in engine performance, but it typically just triggers a Check Engine light.