Error code P0422 - decoding, what it means, reasons for its occurrence, how to remove it

Error codes for the Lada Vesta, like any other modern car, are recorded in the system memory and can be retrieved from it using diagnostic equipment. If any malfunction occurs in the system, the error is recorded in memory and the Check Engine icon is displayed on the dashboard. To read Lada Vesta errors, an OBD-II connector is used, to which diagnostic equipment is connected.

Lada Vesta engine error codes

These are, in principle, all the errors that can occur when operating a Lada Vesta car. I hope you will never need this material, but if you do, then let your car be repaired very quickly.

Hello, I bought a new Lada Vesta on December 31st. Problems started from the first day; after driving 84 km, the car, after a long period of work at a traffic light, began to stall and stalled. An error popped up. I stood for 5-10 minutes. The car started and worked fine. There was no way to sign up for the service right away, either it was work or the service had a day off. When installing the alarm with a mileage of 220 km, they said that the errors were misfire on cylinder 4 and a catalyst error, but since they reset the negative terminal, the error was cleared.

At 300 km the car started to stall at a traffic light again, I came for service. They said it might be the spark plugs and replaced them. I drove 300 km and it all started again, it stalled and would not start right away. I came to the service, told about the problem, and hinted at the coil. They said they'll sort it out. We sorted it out))) When I arrived, they said that this was a unique case. The check light is on, but there are no errors in the real memory. Since there were no errors, the engineer canceled the check. Then I remembered that I could look in the saved memory, but it was too late, since they had already cleared the check and could not start repairs. The check has been cleared, it will pop up again, then come. Unique specialists. OK.

150 km after removing the error, when I stopped at a traffic light, the problems started again. I hobbled to the parking lot, next to the auto shop. The car was still running smoothly, I opened the hood and started checking the coils, disconnecting them one by one. Self-diagnosis showed that cylinder 4 is not working. I went to the store and bought a new reel. Changed it. All OK. After replacing the coil, the car no longer sputtered or stalled.

After 1000 km (1750 km), when returning from another city, an error appeared on the highway. So I have a Lada, I’m already a trained person and I have the elm 327 diagnostic module on my new car. When stopping, we connected the module and saw error p0422. The catalyst error that occurred 5 days after purchasing the car returned. Thanks to Gazpromneft for the application, which displays all my gas stations (ai 95 or ai 95g).

Arriving at the dealer, I reported the error and my thoughts that a new car should not behave like this, and gave it to the dealer. Having warned in advance that there was an error with the catalyst in the first week of using the car, he also showed receipts from Gazpromneft and said that the verdict about bad gasoline was inappropriate here. We took the car for diagnostics. The car spent the whole day in service, and it was returned in the evening. They said that they had sent the data to AvtoVAZ and were waiting for AvtoVAZ’s decision. The next day they called early in the morning and told me to come for additional diagnostics. Again in the service all day, picked it up in the evening. They said that they would have a response in the first half of the day and would call back immediately. At 19:00 I called myself and found out that AvtoVAZ’s conclusion was that low-quality gasoline was used and warranty repairs were denied. After visiting the dealer, I called AvtoVAZ and found out that it was the dealer who took responsibility for the refusal to provide warranty repairs. OK.

I went to another dealer and paid for diagnostics. I found out the same thing. There is only one answer: AI 95 and AI 95 g from Gazpromneft allegedly kill the catalyst from AvtoVAZ. An error of 100 km should have been indicated immediately.

Expectations and reality from the new car did not really come true. I take a new one and come for maintenance, it didn’t work out that way. In principle, the car is not bad. Going back 2 months ago, I would not have paid almost 900 k for a car. And in a conversation with a friend, I learned another piece of news about warranty service, that in most cases expensive repairs will be refused, even if the windshield breaks in front of the dealer when accepting the car, they will find a chip, which will be the reason for the failure. AvtoVAZ and warranty are a strange item. I’m sure that the gasoline was normal and the error at 100 km indicates that the problem was already in the new car, but AvtoVAZ doesn’t care. So, it’s better to pay an auto selector for a used foreign car than to later fight for warranty repairs. And I’m not even talking about the burnt-out low beam))) That’s how it’s a movie in general.

Myth 4. Adaptation is easy.

Some drivers prefer not to contact a service center, but to repair the car themselves using instructions on the Internet. This approach has a right to exist. But you need to understand that an error during adaptation can lead to the replacement of the entire AMT. The cost of such repairs significantly exceeds the amount you need to pay the technician for service.

We recommend that AMT be adapted only by professionals. This way you will receive a guarantee and avoid problems with the operation of the transmission.

The domestic manufacturer allows the driver to independently repair the car without resorting to the help of specialists. General error codes of Lada Vesta can be read without third-party components and special equipment. Self-diagnosis via the on-board computer shows only part of the codes and can notify the driver of the area of ​​damage.

Connection errors between electronic units U0422 of a Lada car

Taking into account the fact that OBD2 errors in the operation of a car’s electronic systems do not always directly indicate a non-functioning element, but more often they provide only general information about the malfunction, we came to the following conclusion:

In different brands and models of cars, the same error can occur as a result of the malfunction of completely different elements.

It became clear that a resource was simply needed in which one could find not only general information about the OBD2 error, but also practical data on a specific car.

The experience of auto electricians has shown that if we consider a specific make and model of a car, then in the vast majority of cases the cause of any error is the same.

We are creating, with your help, a directory of cause-and-effect relationships for the occurrence of a particular OBD2 error in a specific car (make and model). If a description (causality) of the error is not found for your car, then do not hesitate to ask a question.

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If the error indicates incorrect parameters (high or low values) of any of the sensors or analyzers, then most likely this element is working, and the problem must be looked for, so to speak, “upstream”, in the elements whose operation is analyzed by the sensor or probe.

If the error indicates a constantly open or closed valve, then you need to approach the issue wisely, and not thoughtlessly change this element. There may be several reasons: the valve is clogged, the valve is jammed, the valve receives an incorrect signal from other faulty components.

Cars are becoming more complex every day, but also more diagnosable. Our forum was created for everyone, from simple car enthusiasts to professional auto electricians.

Trouble P0422 indicates that the primary catalytic converter (bank 1) efficiency is below acceptable levels.

Diagnostics

Diagnostics of the Lada Vesta car control system is a simple and understandable process. Part of the work is performed by the ECM, independently determining the current state of the main components. In a situation that requires the driver's attention, it can turn on the "Mil" signal mnemogram. This will mean that the diagnosis needs to be performed soon, but the fault is not critical.

In many ways, the correct behavior of the car depends precisely on the condition of the internal combustion engine. The main deviations that can be mistakenly identified by a diagnostician as an electronics failure are:

• reduction of compression in cylinders;
• presence of air leaks in the air tract;
• violation of gas distribution;
• low fuel quality;
• wear of friction pairs in engine mechanisms.

In each case, it is necessary to investigate the error in detail and check all the systems that contribute to its occurrence.

What does P0422 mean?

Trouble P0422 is a general trouble code that indicates that the primary catalytic converter (bank 1) efficiency is below acceptable levels. Catalyst efficiency is determined by the transmission control module (PCM), which uses exhaust gas and temperature data from oxygen sensors located upstream and downstream of the catalytic converter to determine efficiency. If the readings from both sensors match or are almost identical, this indicates that the catalyst efficiency is most likely below acceptable levels. In this case, error P0422 will appear.

Operating principle of the controller

The ECM has its own RAM and is capable of storing error codes. It is, in fact, a central processor that controls the actuators. The controller is located in the engine compartment on the left shock absorber support.

Functions:

• car ignition control;
• internal system diagnostics;
• turning on the warning indication on the instrument panel;
• storing error codes in memory;
• emergency warning.

The M86 controller exchanges data with vehicle system sensors by transmitting a signal via a high-speed CAN bus. Due to this, the data is updated every 0.05 seconds, and the car is always under complete control.

The device, like a personal computer, has 2 types of memory:

• constant - ROM;
• operational - RAM.

It is important to remember that the controller is powered by reduced voltage. Any surges are detrimental to microprocessor boards. Therefore, before starting any work, you must disconnect both terminals of the battery.

How does a mechanic diagnose a P0422 code?

Error P0422 can be diagnosed using a standard OBD-II scanner. The mechanic uses a scanner to view data and gather information about the code, as well as check for other error codes that may be present. The mechanic will then clear the error codes from the PCM memory and retest the system to see if P0422 appears again. If the code disappears, it may indicate an intermittent error or that the code appeared in error.

If the P0422 code appears again, have a mechanic inspect the wires and connectors near the catalytic converter. He will repair or replace any damaged items. The mechanic will then inspect the catalytic converter and also perform a thorough check of the exhaust system for leaks.

If the catalytic converter is the problem, the mechanic will examine other vehicle components to determine the cause of the catalytic converter damage.

Common errors when diagnosing code P0422

The most common mistake when diagnosing a P0422 code is failure to follow the diagnostic protocol, which leads to hasty replacement of the catalytic converter. Before replacing the catalyst, it is necessary to eliminate the cause of its damage, and also consider other error codes present.

It is also a mistake to hastily replace oxygen sensors. Before replacing them, it is necessary to perform a thorough diagnosis, since usually a faulty sensor is not the only cause of the P0422 error.

Myth 1. Adaptation is an optional procedure.

Some drivers believe that AMT is simply slightly complicated mechanics. Therefore, it does not need to be specially “trained” and maintained.

In fact, AMT is truly a modified manual gearbox. And that's why it needs to be adapted. A robot or computer, unlike a human, cannot adjust to clutch wear or the situation on the road. It works according to algorithms. These same algorithms need to be programmed periodically.

How serious is the P0422 code?

The severity of the P0422 code depends on the cause of its occurrence. If the problem is a bad catalytic converter, the engine may stall frequently or be difficult to start. In this case, problems with the vehicle's handling may occur. However, if everything is in order with the catalyst, there should not be any serious problems. In any case, if this code is detected, it is recommended that you contact a qualified technician as soon as possible to diagnose and repair the error to avoid serious damage to the catalytic converter.

To resolve error P0422 you may need to:

Additional comments for troubleshooting P0422

If the cause of this error is a faulty oxygen sensor, other error codes related to this sensor may also appear along with the P0422 code.

Car manufacturers are required to provide a 100,000 kilometer warranty on the catalytic converter. If the catalyst is damaged or fails, you need to find out whether it can be replaced under warranty.

Need help with error code P0422?

The company - CarChek, offers a service - on-site computer diagnostics; specialists from our company will come to your home or office to diagnose and identify problems with your car. Find out the cost and sign up for on-site computer diagnostics or contact a consultant by phone

-23 - no problem, start up! - snowfall, road services can’t cope - no problem, we row, we get out where the Land Cruiser Prado doesn’t get out (though I dug out a neighbor here :), at the same time I learned to drive an automatic car. Well, that’s a different story, how to give Klyaks 5 lyams) And here’s another such “beautiful” mother’s day, I’m going to work, having previously dropped off my wife at her work. On my way there are 2 policemen (speed bumps), I successfully jump over 1, roll up to the second one, jump over, give the gas and something shines in my forehead... a yellow light - well, I think we’re skidding. The ESP is hysterical again. I get up at a traffic light, look down, and then CHANGE ENGINE! Well, I think we’ve already arrived, but no, there are speeds, it reacts to the gas.

I get to work and throw up ELMK, OpenDiag-2 errors, and low readings of 2 lambdas (I changed it that year, for the original one - 4000 rubles from the family budget)

I go to the ERROR tab... and it’s empty:

Don't notice anything? And there is no cover, a plastic cover, the cost is 30 rubles, which covers the board from condensation, from rainwater that can get through a rotten roof, and so on... And now we rewind the film: ... 2 speed bumps, condensation on the roof, under the ceiling, we pass a policeman, a drop falls off and lands on the lamp's circuit board... and then magic

Well, now about the positive, since there is little space in the courtyards, a new parking style has been developed:

Solution? -isolon or other material that does not allow moisture to pass onto the roof -3D printer (hello modern commerce) and a cover similar to Kalinovskaya for the board -you can varnish the board, but not the best solution

Checking the serviceability of the instrument console

The owner of Vesta can promptly notice deviations in the normal operation of the systems only if the dashboard is in full working order. The built-in automatic diagnostic function can prevent up to 90% of failures. Timely intervention and repairs save money on expensive replacement of components, parts, and mechanisms.

The test is performed automatically every time the engine is started. To assess the serviceability and readiness of devices, it is enough:

1. turn off the car ignition;
2. press and hold the “up” button on the on-board computer for several seconds;
3. Set the ignition to the “On” position.

After this, all the arrows on the instrument panel should deviate to the maximum amplitude, and all indicator lights should light up at full intensity. This indicates the serviceability of the electrical system and its readiness to initiate readings.

Which one to buy

Experts and service workshop specialists recommend purchasing an original brake sensor. It is of better quality and lasts longer.

Table 1. Price of brake pedal position sensor

Before changing the “frog”, you can “ring” it with a tester to make sure the part is working.

Which one to buy

Experts and service workshop specialists recommend purchasing an original brake sensor. It is of better quality and lasts longer.

Table 1. Price of brake pedal position sensor

Before changing the “frog”, you can “ring” it with a tester to make sure the part is working.