What is this code P0161?
Code P0161 occurs when the powertrain control module tests the downstream heated oxygen sensor’s heater circuit on Bank 2 and detects a short in the circuit or excessive resistance in the heater circuit.
What does p0121 mean in engine control module?
What Does P0121 Mean? Your TPS “A” Circuit has an expected output voltage range, as does your TPS “B” Circuit (if so equipped). When code P0121 occurs, it means that your Engine Control Module (ECM) recognized that your throttle position “A” circuit’s expected output voltage has either gone above or below the sensor’s expected range.
What does Bank 1 of p0171 mean?
Code P0171 Definition Bank 1 has too much air or not enough fuel. What Does P0171 Mean? Combustion engines run most efficiently when they maintain an air-fuel mixture ratio of 14.7 parts air to 1 part fuel.
Why is my O2 sensor reading so bad?
Many people will replace the air-fuel sensor or O2 sensor as soon as they get a bad reading, but the root cause is often a dirty or faulty mass airflow sensor or vacuum leak, thus causing the O2 or A/F sensor to read differently to compensate. Reading and analyzing fuel trims and the freeze frame data is the key to properly diagnosing P0171.
What to do if check engine light code p0171 is triggered?
If check engine light code P0171 is triggered again, check the rest of the vacuum lines for leaks and continue to the rest of the diagnostic process. Remove the mass airflow sensor and clean the sensor using mass air flow cleaner or contact cleaner.
What does p0161 mean on ho2s Bank 2?
Code P0161 stands for HO2S heater Performance Bank 2 Sensor 2. This indicates the PCM has detected a problem with heater circuit of the downstream oxygen sensor. Bank 2 refers to the side of the engine opposite the #1 cylinder. If you’ve got a four-cylinder, there will only be one bank, and you would not get this code.
What are the common causes of code p0161?
To sum things up, the common causes for code P0161 are as follows: Problem on the ground side of the O2 sensor heater circuit Problem on the power side of the O2 sensor heater circuit O2 sensor heater element has high resistance O2 sensor heater element has an open circuit
Can a faulty oxygen sensor trigger a p0141 code?
If your vehicle only has four cylinders, it will only have one bank and, typically, one downstream sensor, so it can’t trigger this code. Instead, a faulty downstream heated oxygen sensor will be set as P0141 or Oxygen Sensor Heater Circuit Malfunction (Bank 1, Sensor 2).
What does Bank 2 O2 oxygen sensor do?
It warns about an issue with the Bank 2, Sensor 2 oxygen (O2) sensor’s heater circuit. Modern oxygen sensors come with heating elements so that they heat up to the ideal operating temperature quickly. They provide feedback to the car’s computer or the powertrain control module (PCM).