11 Ruizhi fault code is P0420, three way catalytic converter 1 column is only that

Hello, is there a fault: The system performance of the P0420 catalytic converter is below the threshold (row 1).

A catalytic converter (also known as a catalytic purification converter) is an exhaust gas purification device that uses the action of a catalyst to convert CO, HC and NOx in the exhaust gas into a gas that is harmless to the human body. It is generally located before the muffler of the exhaust pipe. The electronic control unit (ECU) detected that the exchange rate of the oxygen sensor 1 2 was comparable to that of 1 1 and therefore inferred that the catalytic converter system was too inefficient.

Causes of failure include exhaust leakage near the exhaust pipe or exhaust manifold, catalytic tank failure, engine coolant temperature (ECT) sensor failure, engine fire or timing lag, dirty oil, faulty oxygen sensor, fuel system pressure too high, etc. [If you have a problem with the car, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】

Hello, change the three-way catalysis [If you have a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

The first oxygen sensor is the first one. [If you have a problem with the car, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】

Every time the vehicle is started, the ECU will quickly conduct a self-inspection of the vehicle, and when a problem is found, it will notify the driver in the form of a fault light to deal with it in time. Recently, a friend found that his vehicle had a P0420 fault**, so he wanted to know how to troubleshoot the fault code P0420. Let's talk to you about it.

Troubleshooting method of fault code P0420When the P0420 fault code appears, it proves that the three-way catalytic converter has failed or is inefficient. This fault code indicates that there may be a problem with both the catalytic converter and the oxygen sensor. First of all, we can check whether the three-way catalytic converter is blocked and aging, if there is no problem with the three-way catalytic converter, it proves that the oxygen sensor has failed.

To solve the failure of the oxygen sensor, you can try to soak the oxygen sensor with toilet cleaner, and the oxygen sensor will return to normal after the carbon deposit on it peels off. If the problem does not end after cleaning the oxygen sensor, then it can only be replaced.

Causes of low catalytic efficiency of P0420The low catalytic efficiency of the P0420 is caused by the aging of the three-way catalytic converter or the failure of the oxygen sensor. The three-way catalytic converter and the oxygen sensor have a service life, generally about 100,000 kilometers of the oxygen sensor needs to be replaced, of course, if you drive on a bad road, then the life of the oxygen sensor will also be reduced. When the conversion efficiency of the three-way catalytic converter is low, the three-way catalytic converter can be deeply cleaned by "hanging the bottle", and generally does not need to be replaced.

Is it faulty: p0333

Chinese definition: Knock sensor 2 circuit height (2nd row).

English definition: knock sensor 2 circuit high (bank 2).

Category: Ignition system.

Background: Knock sensors are responsible for detecting vibrations when engine speed changes. The knock sensor then expresses this vibration in the form of a voltage.

If necessary, the Electronic Control Unit (ECU) prevents knocking by delaying ignition, etc. If this voltage is higher than the calibrated maximum value, the fault code will appear. The causes of failure include failure of the knock sensor circuit, loosening of the knock sensor, failure of the knock sensor itself, incorrect fuel number used, loosening of the mold parts of the engine, failure of the electronic control module (PCM or ECM), etc.

[If you have a problem with the car, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】