P2221 OBD Error Code: Problem & Solutions
OBD Code P2221 - NOx Sensor Heater Sense Circuit Bank 2
The trouble code P2221 can be described as NOx
Sensor Heater Sense Circuit Bank 2. The error code P2221 would start triggering
when the PCM would detect some fault in NOx sensor heater sense circuit. One
thing which you must keep in mind that its symptoms as well as causes would
surely vary as it depends upon a number of things.
Learn More About OBD Error Code P2221
This
trouble code is generic, which would mean that it can apply to all the vehicles
which are equipped with the OBD-II or the vehicles which are made since 1996 up
to the present. The specifications on the definition, the troubleshooting steps
as well as repairs can always vary from one vehicle make to another. This can
happen because of a lot of reasons and the mechanic should diagnose the specific
cause for this code. The P2221 trouble code would indicate that a NOx sensor
heater sense circuit which is not as per the predetermined limit has been
detected by the ECM. Now when this would occur, the fault code would be stored
and there would be an illumination in the malfunction indicator light.
What causes
this problem with the NOx Sensor Heater Sense Circuit Bank 2?
- Faulty
catalytic converter
- Wrong fuel
mixture
- Malfunctioning
coolant temperature sensor
- There can
be inoperative manifold air pressure sensor
- Some issues
related to the mass air flow sensor
- Unusable
fuel injection part
- There can
be distorted fuel pressure regulator
- Issue of
ignition misfires
- Leakage in
the exhaust manifold, flex hose, down pipe, or some other exhaust component
- Imperfect oxygen sensors
Replace/Repair These Parts To Fix OBD Code P2221
- Engine Control Module - Is your car engine light still staying ON after resetting or your car engine is turning off for no reason? Then these are some common symptoms indicating that your car engine control module is defective.
- Powertrain Control Module - The PCM works as the central computer system in an automobile’s mechanism. This auto part is the in charge of all the constituents as well as the functions performed by them. Having such enormous importance in the operation of all the parts means that any defect in it will affect almost every aspect of a car.
- Engine Coolant Temperature Sensor - The most common symptom which is associated with the issues in the engine coolant temperature sensor is the poor fuel economy. Reduction in the fuel economy would also hinder engine performance. Purchase top notch engine coolant temperature sensor online.
- Oxygen Sensor - The O2 sensor can also be at fault leading to lean or rich engine conditions and thus affecting the engine performance and improper fuel consumption. Buy new sensor and replace the faulty one now!
- Exhaust System Parts - Malfunctioning exhaust system parts may lead to a noisy engine exhaust. A significant decrease in the fuel efficiency, power and acceleration are likely to be observed first as soon as there is a fault in the exhaust system parts. So it is important to change them. Log on to Parts Avatar now for supreme quality auto parts.
- Electronic Control Unit - The ECU is a major component of your car's onboard computer. It's used to regulate many systems and subsystems in your car's engine, drive train and other major components. Visit us to buy best quality ECU online.
- Diagnostic Tools - Take help of a professional mechanic to diagnose OBD code error. Use high grade diagnostic tools to resolve this issue. Buy new tools and equipment form us!
Symptoms Of The OBD Error Code P2221
Our main motive is to achieve customer satisfaction and that’s why we will help you to diagnose P2221 code by mentioning some major symptoms below:
Common Symptoms
- Intermittent obstructing
- The engine might fail to start when warm
- Diminishing performance of the engine
- When accelerating, there may be a buzz and delay
- The car engine might run lean or rich on bank #2 exclusively
How To Correct NOx Sensor Heater Sense Circuit Bank 2 Issue
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 P2221:
- You must
fix the defective mass air flow sensor
- Make sure
to mend the faulty catalytic converter
- It is
essential to restore the flawed coolant temperature sensor
- Repair or
replace the quirky oxygen sensors
- Rehabilitate
the defaults in the fuel pressure regulator
- Carefully
adjust the faults in the PCM/ECM
There is
no need to get strained if your OBD Code is still flashing up as we are here at
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Easy Diagnosis Of Engine Error OBD Code P2221
Here are
some steps which you should follow in order to diagnose this fault code:
- Use an
OBD-II scanner in order to verify that the code is present, and check for other
codes for any other type of error or problem that might need attention.
- 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 P2221 Code
- There can
be a failure in the NOx sensor
- Defaults
in the powertrain control module
- Some
issues related to the wiring