Guide To P0140 OBD Error Code Solutions

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The P0140 is a generic OBD-II code which would indicate that the O2 sensor for bank 1 sensor 2 has failed respond to the fuel cut off or fuel enrichment signals by the engine control module.

The oxygen sensor is situated on bank 1, sensor 2 relies on a 0.45V voltage reference generated by the engine control module. Now when this voltage is exceeded or it not met, then the amount of oxygen in the exhaust would be misread by the oxygen sensor. The readouts from this sensor are then later used in the vehicle emission tests and faulty test would mean that the vehicle has failed these tests.

What causes this problem with the 02 Sensor Circuit No Activity Detected (Bank 1 Sensor 2)?

• The engine control module would start determining that the oxygen sensor has no activity
• The oxygen sensor for Bank 1, Sensor 2 may not respond to the fuel cut off or fuel enrichment signals from the engine control module for more than 74 seconds
• The O2 sensor and mass airflow sensor comparison can get misinterpreted by the engine control module
• There can be a malfunction in the engine control module in the O2 circuit

1. Oxygen Sensor - A faulty Oxygen Sensor can be troublesome. You can always rely on us as we have best auto parts for our customers.
2. Mass Air Flow sensor - Everything is fine with Manifold Absolute Pressure sensor and still P0140 code triggering? Then you must get your Mass Air Flow sensor checked.
3. Manifold Absolute Pressure sensor - There can be some issues with the Manifold Absolute Pressure sensor due to which you may see P0140 code appearing over and over again. Visit us to buy best quality Manifold Absolute Pressure sensor online.
4. Exhaust Parts - If everything is alright with Oxygen Sensor, then there is surely some defect in Exhaust Parts. Get it replaced before the situation gets worse.
5. Powertrain Control Module - P0140 code can display due to some defects in the Powertrain Control Module. So, it is very important to replace the Powertrain Control Module with us at equitable prices.
6. Engine Control Module - The P0140 code can also arise due to some issues in Engine Control Module. So, it is advised to replace them as soon as possible.
7. Fuel Pump - P0140 code does not really end up spoiling your PCM, but it might also accompany few Fuel Pump issues. We have best Fuel Pump related parts with us.

We care for our customers and that’s why we can totally understand your problem. That’s the reason why we have listed out some major symptoms behind the flashing up of OBD Code P0140. They are mentioned here as follows:

Common Symptoms

• The check engine light can start appearing which would indicate an issue
• The problem of rough running
• There can be a hesitation upon acceleration after a deceleration phase
• The engine control module might lose the ability to keep the fuel system air-to-fuel ratio correct 

Have a look at some ways with which you can correct the P0140 code:

• Once you have scanned and cleared all fault codes, then you must verify the failure
• The oxygen sensor should be tested to see if it changes when the fuel mixture is enriched
• The mass airflow sensor should be tested properly for the proper readings per specifications
• If the oxygen sensor is contaminated or fails tests, then it should be immediately replaced
• You can always replace the mass airflow sensor if contaminated or fails tests
• The mass airflow sensor should be cleaned properly to see if readings change

Don’t get tensed if you are still facing any of these issues as we care for our customers and that’s why we offer a good range of catalytic converter, fuel pump, relay wiring harness and a lot more. We are sure that now all your issues would be resolved.

• First of all, you should scan the codes and documents freeze frame data
• After that you should monitor the oxygen sensor data to see if the voltage is moving above or below 410-490 mV
• The mass airflow sensor data should be monitored properly for responses to throttle changes as per specifications
• The manufacturer's specific pinpoint tests should be carefully followed for further diagnosis of the code

Common Mistakes When Diagnosing The P0140 Code

• The mass airflow sensor should be carefully checked for proper operation and contamination before you start replacing the oxygen sensor
• If you find out that there is no response of the oxygen sensor, then it can be caused by a mass airflow sensor being contaminated and not calculating the amount of air entering the engine on the intake side