Fix DTC P0470 code on 7.3 Powerstroke in 5 steps

Error codes are common for vehicles, and each error code indicates a specific problem. P0470 is one of those common error codes you may detect if you own a high-powered engine. Engines like 7.3 Powerstroke are very prone to the P0470 error code. This error code usually appears when the Exhaust Back Pressure Sensor circuit malfunctions. However, you can fix this issue with the proper diagnosis. In this article, you should learn everything about the P0470 error code and how to diagnose it.

p0470 code 7.3 powerstroke

What does the P0470 code on 7.3 Powerstroke mean?

7.3 Powerstroke diesel engines are usually Type C big trucks or vehicles. Engines have exhaust back pressure sensors that measure the pressure and pass on the signal to the Engine Control Module (ECM). When the P0470 error code appears on the 7.3 Powerstroke engine, this means that the Engine Control Module got the wrong signal from the exhaust pressure sensor. When the ECM detects a signal that is out of range, it stops the pressure function of the engine.

What are the symptoms of the P0470 error code on the 7.3 Powerstroke?

There are some possible symptoms of the P0470 error code on a 7.3 Powerstroke. Since the error code may indicate different problems depending on the root of the issue, the symptoms may differ. The main symptoms are:

The engine light is on

When you spot the engine light on, this is the first indication of a problem with the engine. This indication is like a warning sign that your engine is in trouble.

No Start

When you see your car does not start or there is no crank, this may be another symptom of the P0470 error code.

Poor Performance

Sudden poor fuel function on engine performance is an indication of the P0470 error code as the engine malfunction slows down car performance in general.

Low Boost Pressure

The engine malfunction would cause the pressure to slow down and indicate an obvious issue.

What causes the P0470 error code on the 7.3 Powerstroke engine?

There are many reasons why the P0470 code shows up on the 7.3 Powerstroke engine. The engine is the most crucial part of a car, and any minor issue may trigger the vehicle as a whole. Some of the common causes of the P0470 code are:

  • Faulty Exhaust Back Pressure Sensor
  • Bad Electrical Connection
  • Short circuit in the engine
  • Leaked Exhaust Pressure Sensor;
  • Blockage in Exhaust System

How To fix the p0470 code 7.3 Powerstroke no start issue?

The no-start engine problem is one of the symptoms of the P0470 error code. You can fix this by checking for any issue with the engine. The 5 steps of diagnosis in this article below this section have the solution. Usually, a bad engine causes this issue. You can repair or replace the EBP to fix the no-start problem.

How To Diagnose and Fix The P0470 malfunction Code On Your 7.3 Powerstroke?

Before you try to diagnose the P0470 error code on the 7.3 Powerstroke, it’s important to figure out the root of the issue. It would be best to find out the actual cause of the malfunction by checking a few things around your engine. You can take some diagnostic steps according to the cause of the error. Let’s learn how to diagnose the P0470 error code step by step –

Step 1- Check for the error code.

If the sensor reads false information, follow these diagnosis steps:

  • Inspect the situation
  • Connect a scan tool
  • Record the DTCs and freeze frame data
  • Clear the data
  • Perform the self-test when the key engine is off
  • Perform the self-test when the key engine is running

If you do not detect the code P0470 code, check for loose or damaged EP sensors and install a new one. If you catch the P0470 error code, go for step 2.

Step 2- Repeat the key on engine off (KOEO) self-test

Try to access the EP and PID by following the steps:

  • If the EP, PID is less than 127 kPa,
  • Clear the DT and keep repeating the self-test.
  • If you see the code again, repair the circuit.
  • If the code disappears, recheck for loose or damaged circuits.

If the Ep, PID is more than 127 kpa, go for step 3.

Step 3 -Check the signal return circuit for resistance.

You can check the resistance by the following steps:

  • Turn off the key engine
  • Disconnect the EP sensor
  • Disconnect the PCM harness
  • Measure the resistance between the EP sensor and the circuit pin

Install a new EP sensor if the resistance is less than 5 ohms. If the resistance is more than 5 ohms, repair the circuit.

Step 4 -Check if the error code appears continuously.

Try the following steps to check for continuous DTC P0470:

  • Keep the key off
  • Once again, access the EP PID
  • Analyze the EP PID while holding the harness close to the EP sensor
  • Analyze the EP PID while shaking the harness towards the PCM

If the EP PID reading fluctuates, detach and isolate the connection for repair. If the EP PID does not fluctuate, follow step 5.

Step 5 – Inspect the PCM connector and EP sensor.

Inspect the situation by following these steps:

  • Disconnect the EP sensor
  • Check the terminals and EP connectors

If the connections are alright, you are good to go. Repair the sensor or replace it if the connection is not okay.

These five steps have been broken down into simpler steps to make the diagnostic process easier for you.

What is the difference between DTC P0470 and DTC P0471?

DTC P0470 and DTC P0471 are almost identical because they both detect voltage out of range. Sometimes the codes appear depending on the type of vehicle. For example, Ford cars are more familiar with the code P0470, and Audi cars show the code P0471 when the same issue occurs.


Where Is The Exhaust Pressure Sensor Located?

Where Is The Exhaust Pressure Sensor Located?

The exhaust pressure sensor is inside the compartment, located on the right side of the engine. The high-pressure oil pump is right beside it.

Can You Avoid The P0470 Code And Run The Vehicle?

Any issue related to the car engine can be harmful. Hence, it is wise not to avoid the P0470 error code. If you ignore the error, your vehicle may run further for some time and then slow down eventually. At some point, the engine will shut down completely. Instead of ignoring it, I suggest you check and take immediate action for fast results.

Dealing with an error code can be difficult, depending on the cause of the issue. There is nothing to worry about because you can get professional help anytime in such cases. The cost of repairing an error code may range from $70 to $150. P0470 code on 7.3 Powerstroke is common. This article will hopefully help you understand why this happens and how to fix it.

Last Updated on November 7, 2022 by Rifen

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