P20AD OBD Error Code: Problem & Solutions

<<See All OBD Codes

The trouble code P20AD can be defined as Reductant Metering Unit Temperature Sensor Circuit Range/Performance. The heating unit for the reductant (DEF) system makes sure that the DEF fluid should not freeze or crystallize between tank and the injector. The temperature of the system is monitored by the engine computer using the reductant metering unit temperature sensor. If the temperature sensor sends back a faulty signal, then the code P20AD would be stored.

The reductant metering unit temperature sensor is being monitored by the engine control module. This trouble code would be set by the ECM when the reductant metering unit temperature sensor circuit would not be as per the specifications set by the manufacturer. The engine control module, powertrain control module or the transmission control module monitors this circuit depending upon the particular automobile.

What causes this problem with the Reductant Metering Unit Temperature Sensor Circuit Range/Performance?

• Some flaws in the reductant metering unit temperature sensor
• Reductant metering unit temperature sensor harness might be opened or sometimes shorted
• Reductant metering unit temperature sensor circuit might have inadequate electrical connection
• Some issues related to the powertrain control module

1. 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.
2. Powertrain Control Module - If there are some faults in the PCM, then it may throw off the timing and fuel settings of the engine, which can negatively affect the performance. A flawed PCM may cause the vehicle to experience a reduction in fuel efficiency, power as well as acceleration.
3. Exhaust Gas Recirculation Valve - Bad EGR valve can cause many performance issues. Common signs include engine performance issues like decreased power and acceleration, rough idle, and the Check Engine Light coming on. Thus, replace faulty EGR valve now!
4. Diesel Exhaust Fluid Pump - If the DEF pump will not function properly, it can cause increased emissions in the exhaust system and reduced the longevity of the filtration elements in the exhaust system. Thus, replace faulty pump immediately.
5. Electronic Control Unit - Do you know that the poor performance or unexplained drops in fuel economy or efficiency are often associated to onboard car computer problems, or defective ECU issues?
6. Diagnostic Tools - Use factory grade diagnostic tools to resolve OBD code P20AD error. Buy new diagnostic tools and equipment for us.

Our main motive is to achieve customer satisfaction as for us our customers are everything and that’s why we will help you to diagnose P20AD code by mentioning some major symptoms below:

Common Symptoms

• The service engine soon light can start lighting up

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 P20AD:

• Carefully adjust the faults in the reductant metering unit temperature sensor circuit
• Repair or replace the quirky ECM
• The reductant metering unit temperature sensor harness should be restored to working order
• Recondition the non-functioning reductant metering unit temperature sensor

However, if you face any issue then we have stocked a wide range of best priced reductant metering unit temperature sensor, powertrain control module, diesel particulate filter, diesel exhaust fluid, def system parts, def fluid, pcm module, ecm module and more to help you out in fixing your car.

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.
• Check for the damaged reductant metering unit temperature sensor and its components for error. It the mechanic finds the fault in the connectors in relation to the reductant metering unit temperature sensor, then replace it immediately.
• Also check for the particular battery cells emitting high voltages and thus might need battery replacement as well.
• Parts or components should not be replaced with reference to only a P20AD DTC. The vehicle service manual should be consulted for more information on possible causes of the fault, along with required testing.
• If all the components seems to work perfectly, inspect the PCM for faults and replacement along with reprogramming.

Common Mistakes When Diagnosing The P20AD Code

• Non performance of the powertrain control module
• Failure in the car wiring
• The reductant metering unit temperature sensor might not function properly