P2246 - OBD Trouble Code

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When this code is set it means that the Engine Control Module (ECM) has detected a problem with the amount of reference voltage in the heater circuit for the oxygen sensor on bank one of the engine.

It normally has direct implications on the fuel delivery system causing increase in fuel consumption as well as engine stalling and not starting. The first indication of the fault in always the check engine light and immediate loss of power form the engine, thus implying Code P2246 error.

Code P2246 stands for O2 Sensor Reference Voltage Circuit High Bank 1 Sensor 1. This indicates the PCM has detected a problem with heater circuit of the downstream oxygen sensor. Bank 1 refers to the side of the engine opposite of the number 2 cylinder. If you’ve got a four-cylinder, there will only be one bank, and you would not get this code. This indicates the PCM has detected a problem with the bank 1 oxygen sensor 1 reference voltage.

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

• The most common reason can be a blown or burnt fuse
• Faulty Engine Control Relay
• Damaged Oxygen Sensor leading to broken circuit
• Open or short of oxygen sensor harness
• Improper data transmission due to faulty circuit connection

1. Engine Control Module - ECM faults are rare but can be a big problem as faulty ECM will cause wrong vehicle operations and can also result in wrong OBD codes getting stored in the system which can also cause misdiagnosis. Thus, replace faulty ECM components now!
2. Electronic Control Unit - The ECU coordinates with the temperature sensor to control the blower fan for keeping the battery temperatures under control. So, replace faulty ECU components now!
3. Exhaust Gas Recirculation Valve - Did you just see check engine light flashing on your dashboard? If the computer would detect some fault with the automobile’s EGR valve circuit, then it would set up the check engine light so that the driver is notified about the fault. Don’t waste time and get them replaced or else this fault code can turn up.
4. Fuel Injector - Faulty fuel injector, it will cause rough idles and difficulty in starting. Also, it will affect the fuel economy and engine performance. Fuel injector can also crack or break leading to leakages and should be replaced immediately.
5. Diesel Exhaust Fluid Pump - The diesel exhaust fluid pump needs to work properly if the transmission system has to perform. If it is not functioning, the transmission may slip and cause harsh shifts too. Thus replace faulty pump now and buy a new one from us!
6. Powertrain Control Module - Check for PCM error which might be due to circuit faults that might require complete replacement and reprogramming. Replace it now!
7. Oxygen Sensor - Inspect for faulty O2 sensor that can affect the engine combustion process and the exhaust emissions. Thus, it is important to understand its importance and replace faulty oxygen sensor now!
8. Manifold Absolute Pressure Sensor - The MAP sensor would fail by getting clogged, contaminated, or sometimes damaged. There can be times when the engine heat would “overcook” the electronics of the MAP sensor and can cause cracks vacuum lines. So it is very important to take proper care of the MAP sensor and in case you need a new one, then Parts Avatar is here at your service.
9. Diagnostic Tool - In order to detect the error, one needs high grade diagnostic tools. Visit us today to grab amazing deals.

Our main motive is to achieve customer satisfaction and that’s why we will help you to diagnose P2246 code by mentioning some major symptoms below:

Common Symptoms

• Loss of response from engine and throttle
• Increased fuel consumptions
• Check Engine Light On
• Black smoke coming from the exhaust pipe

Have a look at some ways with which you can correct the P2246 code:

• Replacing of faulty Oxygen Sensor 1 for Bank 1
• Repairing the broken, damaged and burnt circuit wiring of the sensor
• Effectively checking the troubleshooting ECM/PCM and replacing the components if needed

There is no need to get strained if your OBD Code is still flashing up as we are here at your service. Have a look at our superior variety of Oxygen Sensor, PCM, ECM, Air/Fuel Sensor and many more. Now all your problems would vanish within no time.

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

• First step is the visual inspection of the sensor and its associated wiring and harness to check for any defaults. Damaged wiring or connectors are the main cause of the problem most of the time.
• The next step after the visual inspection is to measure the reference voltage in the oxygen sensor.
• Unplug the connector for the oxygen sensor and use the multimeter to measure the resistance, across the heater terminals.
• If the sensor reading the not as per the desired standards, then the sensor needs to be replaced immediately.
• The next step is to measure the resistance of the wiring from the ECM to the oxygen sensor plug, if the sensor is found good.
• If after all the checks, everything works well, then most probable problem can be with the Engine Control Module itself. The ECM usually activates and grounds the heater circuit. The main problems can be of the circuit; ECM contacts getting burnt which can cause a higher than normal resistance reading. This would definitely cause the P2246 code to set.

Common Mistakes When Diagnosing OBD Code P2246

The first plan of action mostly constitutes of replacement of faulty oxygen sensor. However, it’s important to know that there are many reasons for the fault in the heater sensor. It may be issues with the wiring and other modules as well. There can also be default in the ECM/PCM which require changing. Thus, proper technical assistance is required to come to a right conclusion.