Why are my O2 sensor readings so slow?
Assuming these are narrowband O2 sensors, the sensors should cycle far quicker than that once they are up to operating temp. From experience, an ageing O2 sensor will go lazy with time and exhibit the sort of behavior you’re observing. In all probability you will have to replace the pre-cat sensors.
Can a failing O2 sensor cause lack of power and Shi?
Sometimes taking off in first gear it feels like the car is lacking power. Also when it gets into 4th gear it will run at about 3000 rpms at first then drop right down to 2000. Yes i am sure it is both 4th gear. Im wonering if this could have anything to do with the O2 sensor that is bad My car has 148240 miles.
What are the symptoms of a bad oxygen sensor?
Symptoms of a Bad or Failing Oxygen Sensor 1 Check Engine Light comes on The first line of defense is the Check Engine Light. 2 Bad gas mileage and rotten egg smell If the oxygen sensor is going bad, the fuel-delivery and fuel-combustion systems will be thrown off. 3 Rough engine idle and misfires
What happens when the O2 sensor goes bad on a Chevy Impala?
Oxygen sensors play a vital role in both engine management and emissions control. When an O2 (oxygen) sensor go bad, it’ll cause your Chevy Impala ‘s engine to run less efficiently.
Can a bad oxygen sensor cause rough engine idle?
Rough Engine Idle. Vehicle engines that have a bad oxygen sensor often run irregularly or roughly. Oxygen sensors can control or contribute to many different engine functions, including fuel/air mixture, engine timing and engine combustion intervals. A faulty oxygen sensor can disrupt any of these things and cause a rough engine idle.
How to tell if your oxygen sensor is slow?
1 Codes. If the oxygen sensor is contaminated, the most common codes are P0139 to P0153 for oxygen sensor circuit slow response. 2 Sources of Contamination. If anything besides fuel or air reaches the combustion chamber, it has the potential to poison the oxygen sensor. 3 SENSOR REPLACEMENT. 4 Heaters.
Why does my downstream O2 sensor show Bad readings?
The downstream o2 sensor’s job is to monitor the catalytic converter. Most mechanics will often say it’s the o2 that is shot when it is actually the cat. When the cat is restricted, the downstream o2 will show bad readings. Understanding downstream and upstream, LTFT (long term fuel trim and STFT…
Why does my car not run with the new sensors?
If the car simply won’t run well with the new sensors, it could still be , and indeed likely, that the new sensors are ok. The cause would be that the ECM is now going into closed loop, and there’s something else wrong.