P2041 - OBD Trouble Code

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Error code P2041? Don’t know what to do? Don’t worry! All you gotta do is follow us in this journey of diagnosing the error code P2041. The error code P2041 can be found in both diesel and gasoline engines. In order to decrease the toxic fumes released through the particulate filter in a diesel engine and the catalytic converter in gasoline fueled engines the reductant injector is used. The error code P2041 is stored when an error is identified in the reductant injector air pressure sensor circuit by the powertrain control module (PCM).

The error code P2041 signifies a variation in the system voltage from the reductant injector air pressure sensor (exceeding the manufacturer’ specifications) received by the powertrain control module. It should be noted that for a number of vehicles, multiple drive cycles are required before the check engine lights flashes.

What causes this problem with the Reductant Injection Air Pressure Sensor A Circuit Intermittent?

• Wiring connectors or electrical components that are open, disconnected, corroded
• A malfunctioning reductant injector air pressure sensor
• The presence of an exhaust leak upstream in the system from the exhaust temperature sensor
• Reduced back pressure due to the
  
• installation of an aftermarket off road exhaust system

1. Catalytic converter - The catalytic converter is an exhaust emission device that converts toxic gases into exhaust gas and one of those constituents which will trigger an error code in the system when a fault arises. It would also give rise to the illumination of the check engine light on the dashboard. Buy catalytic converters from Parts Avatar now!
2. Reductant injector air pressure sensor - This essential unit performs the important function of adjusting the amount of reductant that is supplied to exhaust system. So a faulty one can invite a whole lot of problems. Log into Parts Avatar now for your new reductant injector air pressure sensor. 
3. Exhaust system parts - If there is any corrosion or leakages in the exhaust system parts, then it can cause a short circuit in the system. We recommend you to get your exhaust system parts changed immediately. You can always rely on us as we have best auto parts for our customers.
4. Exhaust gas temperature sensor - Are you experiencing sudden idle surges and sudden hesitation while accelerating? Then these are the symptoms of a malfunctioning exhaust gas temperature sensor. Get it checked and replace if needed.
5. Powertrain control module - Is your car not starting in one go? Or are you facing some intermittent starting issues? If yes, then it indicates that your powertrain control module is damaged. So it is very important to replace the powertrain control module with us at equitable prices.
6. Reductant air pressure sensor - The reductant injector air pressure sensor makes use of the sensors in the exhaust system to input voltage readings to the PCM. so it should be noted that a faulty one can really be troublesome. Log into Parts Avatar for your new one.

It is essential 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 P2041 here:

Common Symptoms

• Engine light illuminated (or service engine soon warning light)

Here are some ways with the help of which you will be able to correct the OBD code P2041:

• All the defective or corroded wiring, connectors, or parts should be repaired or replaced
• Repair or replace the exhaust gas temperature sensor that is damaged
• All the broken or burnt wiring, connectors, or components caused by hot exhaust parts should be repaired or replaced
• Consider performing the replacement and reprogramming of the PCM

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

• First and foremost, a visual inspection should be performed of all the wiring, connectors, and components for any physical damage.
• If you find any wiring, connectors or components that are damaged, you should perform the required replacements or repairs. The trouble code should be cleared and the system should be tested.
• If in case the code reappears, the scanner should be connected and all the stored trouble codes should be downloaded along with the flash frame data.
• The exhaust gas temperature sensor and the circuitry associated to it should be checked.
• Well, it is advised to perform a careful inspection of the wiring and connectors located around all the hot exhaust components. One should also look for any heat damage that might have happened due to the hot exhaust parts.
• After all this, clear the code and retest the system if all the repairs have been performed carefully.
• Check the resistance of the exhaust gas temperature sensor using the digital volt/ohmmeter if the code P2041 returns back.
• Leave the volt/ohmmeter leads connected and heat the exhaust gas temperature sensor utilizing a heat gun, if the sensor matches the manufacturer’ specifications.
• Lastly, the ignition should be turned to the ON position for testing the reference voltage and ground signal at the exhaust gas temperature sensor electrical connector if everything else has been checked out.
• Disconnect the powertrain control module if low voltage is detected and check for continuity on the wire leading to the exhaust gas temperature sensor.
• A faulty PCM should be suspected if there is continuity in the circuit. In such cases, we advise you to check the PCM for continuity and resistance.
• All the trouble codes should be cleared before retesting the system to see if the code comes back.

Common Mistakes When Diagnosing the P2041 Code

Here we have listed a few common mistakes that should be avoided while diagnosing the error code P2041:

• A defect in the powertrain control module (PCM)
• Malfunctioning reductant air pressure sensor
• Wiring failures
  

P2040 - Reductant Injection Air Pressure Sensor "A" Circuit High