P2244 OBD Error Code: Problem & Solutions

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If you notice immediate effect on the drivability of the car like loss of engine power and acceleration, increased fuel consumption and Check Engine Light on along with ECM failure, there might be an OBD code P2244 in play. 

The P2244 code means that the powertrain control module is not getting a right response from the O2 sensor.

This indicates that when the computer cuts the fuel to test sensor output, it does not respond quickly enough and the code is set. This can be caused by a problem with the O2 sensor or a problem with the exhaust catalyst getting too much fuel in the exhaust and not being able to burn it off in the catalyst fast enough. The PCM determines the lean to rich transition when the HO2S voltage changes from less than 300 mV to greater than 600 mV. The PCM determines the rich to lean transition when the HO2S voltage changes from more than 600 mV to less than 300 mV. An HO2S that responds too slowly is most likely defective.

What causes this problem with the O2 Sensor Reference Voltage Performance Bank 1 Sensor 1?

• Heated Oxygen Sensor problem
• Faulty Oxygen Sensor Connectors
• Wiring and Harness issues with the sensors circuit
• Blown HO2 sensor fuses
• Faulty catalytic converter
• Excessive vacuum and exhaust leaks
• ECM sensor fault due to circuit or wiring damage

1. 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.
2. 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.
3. 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.
4. Fuel Injector - Bad fuel injectors can cause starting issues, poor idles and affected performance. Thus, the replacements are in order. Buy new fuel injectors now!
5. Exhaust Gas Recirculation Valve - If the PCM detects any fault in the vehicle’s EGR valve circuit, it will set up the check engine light so that the driver is notified about the fault. Properly check for the EGR valve faults leading to this OBD code getting stored in the system. Get the faulty EGR valve replaced or else this fault code can turn up.
6. Diesel Exhaust Fluid Pump - Faulty DEF pump can lead to increased emission and affected vehicle performance. It can also hamper the fuel economy and the power output of the vehicle. Thus, replace faulty DEF pump now!
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!
8. Fluid Pump Control Module - If the control module is faulty, the pump will not be able to work properly and will not be able to transfer fluid to the transmission and hydraulic system efficiently. Thus, replacements are in order.
9. Engine Control Module - Dead cells in batteries can cause a failure in the engine control module. Many times a battery is left in the rig long after a cell has died. This would affect the grounding in the car battery.
10. 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!
11. 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.

It is vital 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 P2244 here:

Common Symptoms

• Prominent increase in the fuel consumption
• Engine stalling and not starting along with loss of power and response
• Visible white or black smoke from the tailpipe
• Over-fuelling over extended period of time causing dilution of engine oil
• Rough idle and hard starting of the engine
• Carbon deposit build up impacting the spark plugs

Want to correct the Trouble Code P2244? Read these points mentioned below:

• Replacement of oxygen sensor(s)
• Repairing/Replacing wiring associated with the oxygen sensor
• Repairing vacuum leaks in exhaust system
• Replacement of the powertrain control module(PCM)

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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 P2244 code to be stored:

• Some of the main diagnostic tools that are required to diagnose a code P2244 are a diagnostic scanner, a digital volt/ohmmeter (DVOM), and a reliable vehicle information source.
• Check and resolve for all engine misfire codes, throttle position sensor codes, manifold air pressure codes, and mass air flow sensor codes must be diagnosed and repaired.
• Always start with a visual inspection of system wiring harnesses and connectors. We focus on harnesses that are routed near hot exhaust pipes and manifolds, as well as those that are routed near sharp edges like the ones found on exhaust shields.
• Use technical service bulletins (TSB) in your vehicle information source to resolve this error. If you find one that matches the symptoms and code/s presented by the vehicle in question, it will very likely aid you in your diagnosis. TSB listings are compiled from thousands of successful repairs.
• Retrieve all the data codes and freeze frame the data using the scanner. This information may be helpful if the P2244 proves to be intermittent so write it down for later. Now, clear the codes and see if the P2244 is reset.
• Start the engine, allow it to reach normal operating temperature, and then let it idle (with the transmission in neutral or park), if the code is reset. Use the scanner data stream to observe O2 sensor input data.
• Narrow the data stream display to include only pertinent data and you will see a faster and more accurate data response. If the engine is running efficiently, upstream O2 sensor data should fluctuate regularly between 1-millivolt (.100-volts) and 9-millivolts (.900-olts). If voltage fluctuations are slower than expected, a P2244 will be stored.
• Connect the Digital Voltmeter Ohm-Meter test leads to the sensor ground and signal wires in order to monitor live data from the O2 sensor.
• Also check the resistance of the O2 sensor in question, as well as voltage and ground signals. To prevent control module damage, disconnect related controllers prior to testing system circuit resistance with the DVOM.

Common Mistakes When Diagnosing the P2244 Code

Use proper diagnostic tools and follow the complete diagnostic procedure without skipping any steps to avoid unneeded repairs and wrong diagnosis. Monitoring the sensor data from the scan tool live data stream is the only way to check for proper operation, and the sensor should not be replaced until it is tested.

Also, always check for damaged wiring and connections as well as PCM faults.