Error Code P20F5: What It Means & What To Do?

<<See All OBD Codes

The trouble code P20F5 can be described as Reductant Consumption Too High. The error code P20F5 would start triggering when the PCM would detect some fault in reductant sensor control 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.

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 P20F5 trouble code would indicate that a reductant sensor control 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 Reductant Consumption Too High?

• Defaults in the reductant sensor
• Reductant sensor harness is open or shorted
• Reductant sensor circuit poor electrical connection

1. Automatic Transmission Module – Sometimes the automatic transmission module is unable to communicate or correctly anticipate the speed of the vehicle and thus creates difficulty in gear shift leading to sluggish acceleration, throttle response and stalling. Thus can also hamper a lot of components physically and thus must be check for and replaced, if required.
2. Engine Control Module - If there is any corrosion or breaks in the internal wiring of the harness, then it can cause a short in the ECM or can also cause corrosion in the ECM through the wiring harness. You can always rely on us as we have best auto parts for our customers.
3. Powertrain Control Module - The onboard computer, or powertrain control module is the brain of the engine control system. Now if the brain is not working properly, then neither is the car engine. Get it replaced before the situation gets worse.
4. Fuel Injector – The fuel injectors are important component of the fuel delivery system that helps in proper utilization of the fuel entering the engine. This not only helps in taking care of the air to fuel ratios in the engine, helping the combustion process but also enhances the performance. Thus, replace faulty injector now!
5. Exhaust Gas Recirculation Valve - It is auto part commonly found on many road going automobiles. It is a part of the vehicle’s exhaust gas recirculation (EGR) system, an emissions system that is designed to recirculate exhaust gases back into the vehicle’s intake so that it can reduce cylinder temperatures and NOx emissions. Purchase top notch exhaust gas recirculation valve from us at economical prices.
6. Electronic Control Unit - Is your car jump starting on reverse polarity? Or are you facing some intermittent starting issues? If yes, then it indicates that your electronic control unit is bad. So it is very important to replace the defective electronic control unit with us at equitable prices.
7. Diagnostic Tools - Buy quality diagnostic tools to check and diagnose OBD code P20F5 error with the help of experienced mechanic. Visit us today!

Our main motive is to achieve customer satisfaction and that’s why we will help you to diagnose P20F5 code by mentioning some major symptoms below:

Common Symptoms

• Illumination in the service engine soon light

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 P20F5:

• Carefully adjust the faults in the reductant sensor circuit
• Recondition the non-functioning reductant sensor harness
• You must fix the defective PCM
• Rehabilitate the defaults in the electronic control unit
• Adjust the flawed reductant sensor

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 carburetor, spark plug, exhaust system parts, engine gasket, distributor cap, pcm ,ecm, ecu 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:

This is a general type of error code which is diagnosed with the help of a scanner. The mechanic will insert a scanner to diagnostic port of the vehicle and recover the codes and freeze frame data. If he happens to find any additional error codes, he has to address them as well. Once it is done, he has to reset the vehicle, and then test drive to see if the error code appears. If the error code does not return, then there can be an erratic condition. Then the mechanic has to check the wires, connectors and other electrical components and quickly replace them if he finds them to be damaged or defective. Then the vehicle should be taken out for a test-drive until the PCM either enters readiness mode or the code is reset. Now if the PCM enters readiness mode at this time, the code is intermittent and it would be very difficult to diagnose. If this is the situation, the conditions which contributed to the code being stored may need to worsen before a correct diagnosis can be made. If the code is immediately reset, the other step of your diagnosis would need that you search your automobile information source for diagnostic flow-charts, connector pin-out charts, connector face views, as well as constituent testing procedures/specifications.

Here is the Step 1

The DVOM should be used to test the reductant sensor according to manufacturer specifications. Components which do not test within maximum allowable parameters should be considered faulty.

Here is the Step 2

If actual reductant system is as per the specifications, the code P20F5 would exist, and the sensor is in working order, use the DVOM to test input and output signal circuits between the pressure sensor and the PCM/SC.

Common Mistakes When Diagnosing The P20F5 Code

• Common mistakes while diagnosing this trouble code are unnecessary and expensive replacements which usually happen when one don’t follow all the steps carefully.
• The most common mistake while diagnosing this code is missing out on diagnosing steps which further leads to the expensive and unnecessary replacements. It is always recommended to seek help of experienced diagnostician to avoid any mistakes.