P0474 - OBD Trouble Code

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The Exhaust Pressure Sensor tells the engine control module (PCM) how much pressure is in the exhaust manifold. If the PCM determines there is an incorrect signal from the Exhaust Pressure Sensor, the PCM will set code P0474.

In order to control the exhaust back pressure regulator in a diesel or turbocharged engine, the exhaust back pressure sensor supplies a voltage reading to the ECM that indicates the current pressure level. If this data does not match the manufacturer’s specifications, the PCM will store the P0474 code.

What causes this problem with the Exhaust Pressure Sensor "A" Circuit Intermittent?

• Faulty or Distorted electrical wiring and connectors.
• Shorted or disconnected exhaust back pressure sensor harness.
• Damaged PCM, in very rare cases.

1. Exhaust Pressure Sensor - Get your Error Code fixed instantly with a new Exhaust Pressure Sensor. Parts Avatar is right place that provides the best Exhaust Pressure Sensors across the country.
2. Ambient Air Pressure Sensor - Facing the error code P0172? An inferior quality Ambient Air Pressure can always be hazardous for the system also it is one of the primal causes behind the occurring of the error code P0172. Tune into Parts Avatar for supreme quality Ambient Air Pressure at economical prices.
3. Manifold Absolute Pressure Sensor - Common causes behind the occurrence of Error Code could also be stem out because of a fault in the Manifold Pressure. So it's advisable to it replaced immediately.
4. Exhaust Manifold - Looking for an Exhaust Manifold? No Worries! We are just a click away. Get your damaged Exhaust Manifolds changed from Parts Avatar now to avoid any further complications caused due to the OBD Error code P0474.
5. Exhaust Connectors - Shortened Connectors can always be problematic for the Engine. Why not get it changed? We at Parts Avatar offer a wide range of Connectors at economical prices.
6. Turbocharger - A broken Turbocharger can end up being the chief host inviting the Error Code P0474. So, replacing one can be one of the wisest decisions to avoid a problematic system.
7. Exhaust Harness - A strong and superior quality Harness should always be a part of your set of equipment’s to overcome the Error Code P0474. So, it should be changed instantly.
8. Powertrain Control Module - Get your Error Code fixed instantly with a new Powertrain Control Module. Parts Avatar right place that provides the best Powertrain control modules across the country.
9. Exhaust Gas Recirculation Valve - Because you’ve got our back! A faulty Exhaust Gas Recirculation Valve can always halt your journey. So why not get one from Parts Avatar?

Next important thing you need to know about are the common symptoms for this OBD Error Code P0474 with your fuel volume control.

Common Symptoms

In mostly all the cases, the exhaust back pressure regulator is disabled, in either a closed or an open position, when the P0474 Error Code is stored. This may end up decreasing the engine performance and insufficient turbocharger pressure. The Check Engine Light will light up, and there may be other codes stored in the PCM relating to the turbocharger or the exhaust systems.

Fixing problems with your car is not as easy as it might seem. You need to be extremely careful and follow certain steps.

• Clearing or replacing the blocked back pressure tube.
• Replacing or cleaning a damaged exhaust back pressure sensor.
• Replacing or repairing a shorted or a disconnected exhaust back pressure sensor harness.
• Manually test individual circuits within the exhaust back pressure system, and replace defective components.
• In rare cases, replacing the distorted PCM.

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It is essential to diagnose this fault code. Here are some steps which a mechanic should follow for diagnosing the problem that triggered a P0474 code to be stored:

To begin diagnosing the P0474 code, the mechanic should first verify the code with an OBD-II scanner. Followed next the mechanic should inspect all the electrical components, including wiring and connectors, related to the exhaust back pressure system, and replace/repair any of the parts that are damaged, loose, or faulty. Now, after that the Code has been cleared, the mechanic should retest the system. If the code returns, the mechanic has successfully diagnosed an issue with the exhaust back pressure system, and can move forward to making other repairs.

Common Mistakes When Diagnosing the P0474 Code

Wishing to combat this Error Code P0474? Well, it won’t be tedious process anymore. Here listed are the few common mistakes made while diagnosing the Error Code P0474

• A faulty Exhaust Pressure Sensor
• A failure in the Powertrain control module.
• Issues with the Wiring.