The Ford 6.7 Powerstroke engine comes standard with a turbo. The most common turbo is the Garrett GT30R. The turbo forces air through the manifold into the cylinders at a pre-set optimum pressure for maximum engine performance.
To ensure the engine is receiving air at the right pressure, the Powerstroke 6.7 uses a manifold absolute pressure sensor (MAP) installed within the manifold to monitor the pressure.
The powertrain control module monitors signals from the MAP sensor, and when a drop in air pressure within the manifold is registered, a p1247 error code is generated.
To put it simply, a code P1247 error in the 6.7 Powerstroke engine means the turbo boost pressure is low.
What are the Possible Causes of Code P1247 code in the 6.7 Powerstroke?
Less serious causes of the P1247 code in the 6.7 Powerstroke are:
- A leaking manifold hose: If the manifold is cracked or loosely fitted, air will escape, and pressure will drop within the manifold. Due to the immense pressure generated by the turbo, even a small crack or opening in the manifold will lead to a considerable drop in pressure.
- Failing MAP sensor: Over time, the MAP sensor can fail and become unable to register the accurate air pressure leading the PCM to trigger the error code P1247 in the 6.7 Powerstroke.
- Leaking MAP hose: Due to high temperatures within the engine, the MAP hose might get too hot and harden over time. A hard MAP hose is not flexible and might develop cracks that can leak the boost leading to low pressure within the manifold.
More serious causes of the P1247 code in the 6.7 Powerstroke are:
- Faulty Powertrain Control Module (PCM): This is unlikely. When the PCM fails in the 6.7 Powerstroke engine, you will likely get many other error codes, not just the p1247.
- Low turbo boost: A failing turbo unit will deliver a much lower boost which triggers the P1247 error code as a result needs to replace with an aftermarket 6.7 Powerstroke turbo.
What are the symptoms of the P1247 error code on 6.7 Powerstroke?
A drop in the manifold pressure means the 6.7 Powerstroke engine is getting less air than it needs. You will know this when the vehicle shows the following symptoms:
- An active check engine light
- Loss of power when ascending a steep slope.
- Poor acceleration
- The car struggles too much when towing
- Excessive dark smoke
How Can You Diagnose the P1247 Code On Your Ford 6.7 Powerstroke?
To diagnose to source of the P1247 error code, use the following steps:
- Step 1: Inspect the MAP sensor hose for damage, such as cracks, loose-fitting, and restrictions.
- Step2. Visually inspect the intake manifolds for cracks, loose-fitting, or restrictions that are obstructing smooth airflow.
- Step 3. Next, have the MAP sensor itself tested. Get a professional to check whether the MAP sensor is working correctly.
- Step 4. Check the PCM. A professional should check to ensure it is not faulty and generate error codes, including the P1247.
- Step 5. Check the turbo boost: A professional technician should measure the amount of boost being generated by the turbo to ensure it is the right amount.
What repairs can fix the P1247 code?
Once the diagnosis process has identified the point of failure, you can fix it as follows:
- The MAP sensor hose is damaged. To replace it, find the hose connected to the MAP sensor on one side and a metal nipple extruding from the intake manifold on the other side. It is secured by simple spring clamps that are easy to undo and replace.
- If the intake manifold is damaged. Removing and replacing the intake manifold needs to be done by a technician. However, to remove the manifold, you need to disconnect and move out of the way the following neighboring components:
- Disconnecting the wiring harnesses
- Disconnect the MAP sensor.
- Disconnect the coolant hose.
- Disconnect the turbo actuator connector.
- Disable the EDRT sensor.
Then loosen the nuts and retainers to free the manifold. When installing a new manifold, ensure new manifold gaskets are installed.
- Replacing the MAP sensor. Replacing the MAP sensor should be done by a trained technician. The steps involve:
- Disconnect the batteries
- The MAP sensor and the manifold are located on the passenger side.
- Since the sensor is mounted on a bracket, removing the whole bracket is easier than the sensor itself.
- When the bracket is unbolted, you can easily reach the MAP sensor and undo all the connection cables.
- Replace the sensor and restore it first to the bracket, then back to the engine.
- Low turbo boost. Turbo servicing or replacement should be done by the dealer or a trained technician. Turbo servicing involves inspecting and replacing turbo components such as the shaft and bearings. In some cases, the entire turbo might need to be replaced.
Common mistakes when diagnosing the P1247 code On Your Powerstroke
The most common mistake most people make is failing to properly inspect the intake manifold and the MAP hose before inspecting the MAP sensor, the PCM, or the turbo itself.
A P1247 error code in the 6.7 Powerstroke engine can be caused by a leaking or constricted hose or manifold, which is a simple fix.
Ensure you check for leakages before checking the expensive components, such as the PCM or turbo.
How serious is the P1247 code? Is it possible to drive without fixing the issue?
A P1247 error code in the 6.7 Powerstroke is not an emergency; however, it is important to check your vehicle as soon as possible.
Due to the reduced air pressure, your vehicle will lose power, and it cannot be used normally until the issue is fixed and the error code is cleared.
Prevention and Maintenance: How To Prevent P1247 Code from appearing.
You can take several steps to ensure your 6.7 Powerstroke engine does not develop a P1247 error code.
- Buy original hoses from a Ford dealer. These are more resistant to cracking.
- Do not short-circuit the vehicle. A short circuit might cause the sensors, including the MAP sensor, to malfunction.
- Ensure you service your vehicle at the right intervals. When engine oil degrades and is not replaced, it loses its lubrication qualities. This can lead to turbo failure due to insufficient lubrication within the turbo.
Last Updated on April 7, 2024 by Rifen
