check it out and let me know. how does the car drive? * the easiest way to test for a bad conerter is to unplug ita t the manifold. you will need two new bolts since the old ones will snap off. take for a drive. Warning, it will be VERY loud. bring license and registration, as well as a good story. before heading out clear all codes by disconnecting negative terminal for 10 seconds. if at the end of the trip the codes are gone, then you have your answer.
You have a bad 02 sensor after the catalytic converter.
hi! it's the downstream oxygen sensor located right after the catalytic converter,,
Post is the O2 sensor located behind the converter and Pre is the sensor located in front of the converter. Sometimes also referred to as upstream and downstream.
I believe 0421 is a catalytic converter inefficiency code which is usually caused by a bad o2 sensor or a bad catalytic converter, but I have also seen fouled plugs and exhaust leaks cause this code.
Bank 1 (same side as cylinder #1) sensor 1 (before catalytic converter) oxygen sensor circuit voltage high.
P= Powertrain 0140= bad oxygen sensor downstream from the catalytic converter. Check wiring first, if no problems with broken wiring replace sensor.
All oxygen sensors are located in the exhaust system. Some have one in the manifold, some have one before the catalytic converter. Then others have one before and one after the converter. It requires a special socket to remove and replace it. Just because your code says oxygen sensor, does not mean it is bad. A vacuum leak can give a code that the sensor is reading lean.
Replace the O2 sensor. Bank 1 sensor 1 means it is the sensor on the side of the number 1 cylinder and before the catalytic converter.
catalytic converter failure.
from what i have read and can find out it is catalyst system below threshold bank 2.it is a catalytic converter problem some say it could be an oxygen sensor. i have the same code on my expedition.i haven't figured out if it's the converter yet
There is a probelm with the automatic transmissions torque converter.
I have the same fault code on my 2003 Corolla. From my research, the code means that the car's computer is sensing that there has been a drop in catalytic converter efficiency. This is determined by the computer by comparing the signal of the O2 sensor mounted before the catalytic converter with the signal of the O2 sensor mounted after the catalytic converter. If the two signals are too similar, this means that the catalytic converter is not doing it's job. A number of things can be the cause of the fault code: # Bad catalytic converter - It's reached the end of its useful life. It's time to replace it. # Engine leaks oil and/or coolant into exhaust- Oil and/or coolant is leaking and is clogging the catalytic converter. Engine seals and gaskets should be checked. Engine compression should also be tested. Any leaks should be repaired and the catalytic converter should be replaced. # O2 sensor/s bad - Although O2 sensor failure usually gives it's own fault code, not everything is perfect. Sensor's should be checked anyway just in case the computer did not catch the fault. In this case sensor/s need replacing. I hope this information comes in handy. Unfortunately, what ever your specific situation is, it is most likely a costly one.
Trouble code P0743 means:Torque converter clutch circuit electrical
A code 10 is a Iat sensor. Intake air tempature sensor.
Post Catalyst Fuel Trim System Low Limit It is an 02 sensor code which could be anything from an exhaust leak to a bad catalytic converter.
O2 sensor bank 1 = cylinder 1 side, prob driver side sensor 1 = before cat converter so up front before the converter
Torque Converter Clutch Circuit Stuck On
Catalytic converter failure.Catalytic converter failure.
The catalytic converter has an oxygen sensor in front and behind it. When the vehicle is warm and running in closed loop mode, the upstream oxygen sensor waveform reading should fluctuate. The downstream O2 sensor reading should be fairly steady. Typically the p0420 code triggers the Check Engine Light if the readings of the two sensors are similar. This is indicative of (among other things) a converter that is not working as efficiently as it should be (according to specs). The code P0420 may mean that one or more of the following has happened: Leaded fuel was used where unleaded was called for, an oxygen sensor is not reading (functioning) properly, the engine coolant temperature sensor is not working properly, damaged or leaking exhaust manifold/catalytic converter/exhaust pipe, retarded spark timing, the oxygen sensors in front and behing the converter are reporting too similar of readings
There are 2 sensors. One located within the engine compartment mounted on the exhaust pipes next to the engine block. The other is located next to the catalytic converter. As far as the code is concerned, consider taking out the sensor, clean it and reinstall it. Erase the code. Run engine for a couple of days. If the code comes back you should then replace the old sensor with a new one.
Trouble code P0340 means: Camshaft Position Sensor A Circuit (Bank 1 or single sensor) Replace the sensor
Trouble code P0741 means:Torque converter clutch circuit performance or stuck on
Gosh, I hope you mean O2 sensor, and if you do they are located on the exhaust tubes, one before the catalytic converter, and one right after it.
Heated 02 sensor code
po171 means System too lean in bank 1 ,translation o2 sensor bad, probably the one before catalytic converter,but could be one after cat.