P2210 OBD Error Code: Problem & Solutions

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Is the diesel exhaust fluid faulty? Are you looking for the diagnostic steps for P2210 error code? Then keep reading further as you are at the right place. The conversion of the remaining exhaust particles into harmless gases is carefully assisted by the diesel exhaust fluid (DEF). The temperature of the exhaust system has to be more so that the leftover exhaust particles can be easily burnt off. In order to bring the diesel particulate filter up to the expected temperature, the DEF fluid has to be injected into the exhaust stream. This will finally help in the conversion of harmful NOx into nitrogen, water, and carbon dioxide.

The excessive NOx which was still available in the exhaust stream can be reduced with the help of reductant catalyst (SRC). Multiple NOx sensors will be used by the engine computer to confirm the functioning of the reductant system. The P2210 error will be set, if one of the NOx sensors fails to function properly.

The amount of nitric oxide and nitrogen dioxide gas is calculated by the ECM by utilizing the data that is received from the upstream and downstream oxygen sensors of the vehicle which is joint with the readings of the NOx sensor. For environmental emission reasons, the NOx levels are regulated by the ECM. The bank 1 which is mentioned in this error code is the cylinder 1 of the engine bank. P2210 error code signifies the ‘NOx sensor heater sense circuit low bank 1. When the ECM finds an issue with the output level in the sense circuit, this error code will show up. The reading level from this sense circuit seems to be extremely low for the preferred specification.

What causes this problem with the NOx Sensor Heater Sense Circuit Low Bank 1?

• Malfunctioning of the catalytic converter.
• Fuel mixture might be improper.
• Faulty coolant temperature sensor.
• Broken manifold air pressure sensor.
• The mass air flow sensor might have problems.
• Defective fuel injection parts.
• Fuel pressure regulator might be defective.
• Misfiring of the ignition.
• Leakage from the exhaust manifold, flex hose, downpipe, and other exhaust components.
• Damaged oxygen sensor.

1. Diesel Exhaust Fluid - The P2210 error can be avoided if the dirty DEF is quickly replaced as it can cause severe damage to the catalyst.
2. Diesel Particulate Filter - If the turbo fails or if there is too much of oil dripping into the diesel particulate filter, then it can turn out to be defective. Avoid the P2210 error by replacing the faulty DPF.
3. Powertrain Control Module - A faulty PCM can cause misfiring issues and the engine behavior might also be erratic. If your vehicle is causing misfiring issues, then it is because of a faulty powertrain control module. Shop them from Parts Avatar at best prices online.
4. Engine Control Module - The engine control module is considered to be the brain of the engine management system. So if your ECM is not functioning properly, then an immediate replacement is needed so that the system functions normally.
5. Nitrogen Oxide Sensor - a burning smell from the engine is an indication that the NOx sensor is malfunctioning. Repair or replace it as soon as possible.
6. Catalytic Converter - If the exhaust valve is leaky, then the catalytic converter can turn out to be faulty. Get the best catalytic converter for your vehicle from PartsAvatar.
7. Coolant Temperature Sensor - Do you see any black smoke from the exhaust of the vehicle? It’s mainly because of a damaged coolant temperature sensor which needs replacement.
8. Air Pressure Sensor - A very rough idle by the engine indicates that the air pressure sensor is faulty and it needs replacement as quickly as possible.
9. Mass Air Flow Sensor - The engine will stall as soon as the vehicle is started if the MAF sensor is damaged. Replacing it as soon as possible can help the vehicle to function normally.
10. Fuel Injection Parts - There will be starting trouble if any of the fuel injection parts are damaged. Replacing or fixing this issue can help you to avoid the P2210 error code.
11. Fuel Pressure Regulator - You will notice black smokes emitting from the tailpipe if the fuel pressure regulator is damaged. Change it as soon as possible.
12. Flex Hose - You will experience uneven braking like pulling to the left or to the right while applying brake if the flex hose is damaged. Get rid of this issue so that the system functions normally.
13. Oxygen Sensor - The vehicle will function normally if the faulty oxygen sensor which shows poor gas mileage is replaced or fixed immediately.

It is essential to know the symptoms of an issue as only then you would be able to solve the problem. So that’s why we have listed out some major symptoms of OBD Code P2210 here:

Common Symptoms

• Stalling might be erratic.
• The engine might hesitate to start when it is warm.
• Performance of the engine is reduced.
• Hissing noise or hesitation of the vehicle during acceleration.
• The engine might run slim or rich especially on bank 1.

Here are some ways with the help of which you will be able to correct the OBD Code P2210.

• NOx sensor must be changed.
• Replacing the electrical components.
• Changing the upstream or downstream oxygen sensors.
• Altering the catalytic converter as well as the other components which caused the failure of the catalytic converter.

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Here are some steps which you should follow in order to diagnose this fault code:

• With the help of a scanner, the P2210 error code must be diagnosed.
• A trained mechanic will use the freeze frame data from the scanner to evaluate the P2210 error code and see if there are any additional trouble codes.
• If the error is present, they must be addressed in the logical sequence in which they are found.
• After this, the mechanic will reset the error code, restart the vehicle and see if the error still appears.
• After resetting, if the error is not present, then it would have probably been probably caused by mistake or as a result of an erratic issue.
• But if the error still returns after resetting the P2210 error code, then the technician has to visually check the electrical components which can affect the oxygen sensor, NOx sensor or the catalytic converter.
• Wires or connectors that are shorted or damaged must be fixed.
• A common reason for the failure of the catalytic converter is due to the leaks in the exhaust system.
• Next, the temperature of the exhaust pipe which is both placed upstream and downstream of the catalytic converter must be checked with the help of a temperature gun.
• The catalytic converter can be defective if the temperatures do not match with the manufacturer’s recommendation and the technician has to check thoroughly to know as to why the failure of the catalytic converter has occurred.
• The technician will then check the upstream and downstream oxygen sensors, NOx sensor to ensure that it is working properly.
• Every time a repair is done, the mechanic has to reset the error code and restart the vehicle to examine if the error still appears.
• This will help him to know if the error has been resolved.
• The technician will continue with the diagnosis even if the P2210 error code disappears to find the root cause of the failure of the catalytic converter.

Common Mistakes When Diagnosing the P2210 Code

• Malfunctioning NOx sensor.
• Broken PCM.
• Electrical wires might cause some problem.