Guide To P2222 OBD Error Code Solutions

If the engine control module would detect a variation in the voltage coming from the NOx sensor heater sense circuit that is outside the parameters set by the automobile manufacturer, then it would store the P2222 error code. This would also give rise to the illumination of the check engine light.

What causes this problem with the NOx Sensor Heater Sense Circuit Range/Performance Bank 2?

• There can be inoperative catalytic converter
• Inaccurate fuel mixture
• There can be distorted coolant temperature sensor
• Faulty manifold air pressure sensor
• The mass air flow sensor might not be functioning properly
• Broken fuel injection part
• Defective fuel pressure regulator
• Misfiring in the ignition
• The exhaust manifold, flex hose, down pipe, or some other exhaust component might start leaking
• Malfunctioning oxygen sensors

Looking out for some ways with the help of which you can correct this fault code? Then you have arrived at the correct place. We are here to help you out, so you must check out the steps mentioned below as follows:

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

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It is essential to diagnose this fault code. Here are some steps which a mechanic should follow for diagnosing the problem that triggered a P2222 code to be stored:

The mechanic or the technician will use a diagnostic scanner or code reader like DVOM to visually scan for the error codes in the vehicle. The initial 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 restored.

Common Mistakes When Diagnosing The P2222 Code

• Malfunctioning powertrain control module
• There can be a failure in the NOx sensor
• Wiring problems