P0472 OBD Error Code: Problem & Solutions

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The Exhaust Pressure Sensor informs the engine control module (PCM) about the amount of pressure in the exhaust manifold. If the PCM detects an incorrect signal from the Exhaust Pressure Sensor then the PCM immediately sets the signal for the code P0472.

A P0472 code indicates a problem with your vehicle’s electrical circuit, though the source could be electrical or mechanical. The problem roots out from the exhaust back pressure sensor not working correctly.

What causes this problem with the Exhaust Pressure Sensor Low Input?

• The inappropriate working of the exhaust back pressure sensor.
• The exhaust back pressure sensor receives a poor electrical connection.
• When the harness of the exhaust back pressure sensor is shortened or open.
• A fault in the signal circuit occurring between the PCM and the exhaust pressure sensor.
• A fault in the power supply between the exhaust pressure sensor and the PCM.
• Lack of power to ground in the signal circuit to the exhaust pressure sensor.
• An internally damaged exhaust pressure sensor shorted to the ground.
• Internally damaged or failed PCM (this condition is least likely to happen)

1. Exhaust Pressure Sensor - There can be some issues with the Exhaust Pressure sensor which can halt your journey by causing the error P0472. Visit us for the best quality of exhaust pressure sensors at economical prices.
2. Ambient Air Pressure Sensor - Having problems with Ambient Air Pressure? Don't you worry! Parts Avatar has it all. Faults in the Ambient Air Pressure could lead to problems. So, it should be replaced instantly.
3. Manifold Absolute Pressure Sensor - The recurrent cause behind the Error code P0472 could be due to inaccuracy in the manifold pressure. So, to overcome the error, instant efforts should be taken.
4. Exhaust Connectors - Distorted Connectors could end up being the chief host, inviting the Error Code P0472. So, replacing the damaged ones can be the wisest decisions to further avoid complications.
5. Turbochargers - Facing the Error Code P0472? Inferior quality Turbochargers could always hazardous for the vehicle. So, it’s always a good decision to get it changed or replaced.
6. Exhaust Harness - Damaged, corroded or disconnected harness can be complicated at times, ultimately leading to the occurrence of the Error Code P0472. So, damaged ones should be changed instantly from the premium quality ones offered at Parts Avatar.
7. Powertrain Control Module - abbreviated PCM; this is an integral control unit. So, a defective one should be changed immediately.
8. Exhaust Gas Recirculation Valve - Looking for a superior quality Exhaust Gas Recirculation Valve? To avoid further troublesome journeys caused by constant appearance of Error Code P0472, one should immediately change the damaged valve from the ones available at Parts Avatar.

For us our customers are everything, and that’s why we will help you to diagnose P0472 code by mentioning some important symptoms below:

Common Symptoms

• Lack of power supply to the engine.
• If the Check Engine light turns on.
• Not being able to perform manual regeneration.
• A crank-no start (if you aren't able to perform a regeneration).

To correct this issue, you might need to undergo few replacements for the defective parts such as:

• Replacement and cleansing of any wires present in the EPS
• If the connectors are the problem, then erasing the code from memory should result in a clear screen as opposed to the code returning
• If the code returns, the sensor and its circuits should be tested.
• Keeping a check of the voltage to see that it doesn't suffer a failure.

Apart from this, you might need to replace other damaged parts too like Exhaust Pressure Sensor, Ambient Air Pressure, Manifold Pressure, Exhaust Manifold, Connectors, Turbocharger, Harness, Powertrain Control Module, Exhaust Gas Recirculation Valve and more. You can easily find all these parts with us. Not only that you can get these parts shipped to your door free, if your cart value happens to exceed $99.

If you want to easily diagnose this fault code, then all you have to do is to follow the steps which are mentioned below:

• A PCM flash/reprogram protocol, if possible.
• Checking the exhaust pressure sensor, and then investigating its connectors and wiring for rubbing, chafing, burn spots, bare wires, and melted plastic.
• Taking the connectors apart, look out for corroded or burnt terminals and possibly clean them.
• Clearing the diagnostic trouble codes from memory through using a scan tool to see if the code returns.
• If the code returns back, the sensor and various circuits would need to be tested.
• Disconnecting the harness that connects to the exhaust pressure sensor with a DVOM (digital volt/ohm meter) and testing the power supply circuit that leads to the sensor to make sure it is powered up.

Common Mistakes When Diagnosing the P0472 Code

A technician might fail at times to correctly diagnose and inspect the complications caused by the OBD Error Code P0472. So here, to help our customers at Parts Avatar, we have listed common mistakes that could be made while diagnosing the Error code.

• Failure of the exhaust pressure sensor
• Failure of the powertrain control module (PCM)
• Wiring issues.