P2225 OBD Error Code: Problem & Solutions

It is the engine control module which would examine the NOx sensor heater sense circuit. This trouble code would be set by the ECM when the NOx sensor heater sense circuit reading would not be as per the parameters set by the manufacturer.

What causes this problem with the NOx Sensor Heater Sense Circuit Intermittent Bank 2?

• Some issues related to the catalytic converter
• Imprecise fuel mixture
• There can be distorted coolant temperature sensor
• The manifold air pressure sensor might be flawed
• Malfunctioning mass air flow sensor
• Faulty fuel injection parts
• There can be inoperative fuel pressure regulator
• Problems of ignition misfires
• Issue of leakage from the exhaust manifold, flex hose, down pipe, or some other exhaust parts
• The oxygen sensors might be damaged

1. Engine Coolant Temperature Sensor - If there are some issues in your car engine coolant temperature sensor, then it would result in the illumination of the check engine light. The check engine light would keep on flashing until the problem is addressed. Buy new engine coolant temperature sensor from us online.
2. Engine Control Module - The solenoid might cause a short in the engine control module because of corrosion in the solenoid or the wire running from the solenoid to the ECM harness.
3. Electronic Control Unit - The ECU power management control module keeps in check the hybrid battery charging functions. If the ECU is faulty, the battery pack will not be able to properly get charged and thus, the ECU might need replacement.
4. Oxygen Sensor - The O2 sensor is mounted in the exhaust manifold to monitor how much unburned oxygen is in the exhaust as the exhaust exits the engine. Monitoring oxygen levels in the exhaust is a way of gauging the fuel mixture. Thus, replace faulty O2 sensor now!
5. Powertrain Control Module - A trouble with the PCM would mean that it is unable to determine the right fuel mixture and would send the car engine either more or less fuel than it requires. Now when the engine gets more, the carbon emission would increase and fuel economy would drop. In case of the opposite, the engine will choke, stutter, and might start stalling sometimes.
6. Exhaust System Parts - As the exhaust system parts are likely to withstand excessive heat and extreme temperatures, these are prone to damages. Also, a problem in them leads to strange noises, cracks in the exhaust system pipes or breaking in the exhaust manifolds too. We advise you to change or restore the exhaust system parts as soon as possible.
7. Diagnostic Tool - Usually any OBD code problem requires deep insight into the problem and high grade tools in order to fix it properly. Thus, buy quality diagnostic tools form us!

If you wish to correct this fault code, then you have to follow certain steps. Correcting a problem needs your careful attention. Here are some ways with the help of which you will be able to correct the OBD Code P2225:

• Rehabilitate the defaults in the fuel pressure regulator
• The malfunctioning mass air flow sensor should be repaired or replaced as per the need
• Carefully adjust the faults in the manifold air pressure sensor
• The coolant temperature sensor should be restored to working order
• Recondition the non-functioning catalytic converter
• It is necessary to perform proper service of the unsound PCM/ECM
• Adjust the flawed oxygen sensors

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If you want to easily diagnose this trouble code, then you must follow the steps which are mentioned here as below:

• The first and the foremost step is to clear the codes and then the entire vehicle should be re-scanned. Now if you find out that none of the DTCs (Diagnostic trouble code) are coming on as active right away, then the vehicle should be taken out for a test drive to check if it reappears. If only one of the codes are reactivated by the ECM, then you should continue the diagnostic for that particular one.
• After that the exhaust for any leakages should be checked. A good sign of a leakage would be black soot around cracks and gaskets of the system. Many a times it is very easy to replace the exhaust gasket. A fully sealed exhaust is integral to the sensors which are involved in your car exhaust system.
• Use an infrared temperature gun to monitor the exhaust temperature before and after the catalytic converter. Then it is essential to compare the results to the specifications of the manufacturer, so one should refer to the particular service manual for this.
• Now if the temperature of the catalytic converter is as per the specifications set by the manufacturer, then you must your focus to the electrical system involved with these sensors. Begin with the bank 2 NOx sensor harness and connector. Many a times these harnesses tend to crack and fail because of close proximity to extreme temperatures of the exhaust. The damaged wires should be repaired by soldering the connections and heat shrinking them. Examine the oxygen sensors involved in the bank 2 to ensure they are not quirky, which might alter the NOx readings downstream. If there are some flaws in the connector and it is not making sufficient connections or not locking properly, then it should be repaired or replaced.

Common Mistakes When Diagnosing The P2225 Code

• Powertrain control module related issues
• Quirks in the NOx sensor
• Issues related with the car wiring