If there is no reduction seen, perform an inspection of the EGR valve , cooler and pipe for excess soot buildup. This will require some disassembly to review the inside of the pipes for possible buildup. If this is determined to not be a root cause, the next steps will depend on the type of EGR valve being used.
For vacuum controlled EGR valves, measure the vacuum pressure supplied to the EGR valve and ensure it is aligned with the specifications for that vehicle. For actuator controlled EGR valves, use a scan tool to monitor the EGR valve position and ensure it is in-line with the expected values. A next step is to check EGR temperature and pressure sensor for correct values by placing them in known conditions and reading the values via scan tool.
Insufficient EGR flow can be a failure that is difficult to diagnose. This is often related to some restriction in the pipe as opposed to actuator control itself. In some cases a specific root cause may be more common based on the specific vehicle being addressed. If going through these steps does not help you to quickly resolve the issue, a web search for EGR issues for your specific vehicle make, model, and year can often help to pinpoint based on a common issue seen for that vehicle.
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I have P on my o4 kia amanti very annoying i cleaned intake replace egr valve. Egr vacuum solenoid. Hoses cleaned egr tube soaked in gas overnight cannot get rid of code i tryed everything utube told me. My sisters Mitsubshi Galant has this code following having PO code. Of which we brought it to our mechanic of which we highly trust for.
When we called about the car he said they cleaned it. Well, the light came back so he had use bring it back to replace the EGR valve and only charging for the part. I did try some catalytic converter clearer maybe that will clear it up doubtful but cant hurt to try. Some people say the problem car diagnostic code p is the dpfe differential pressure feedback electronic sensor and not the egr valve. That is a pressure sensor that checks the differential pressure and it is right on the engine.
Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. Share Share. Code P Definition Exhaust Gas Recirculation EGR Flow Insufficient Detected Code P Meaning The exhaust gas recirculation EGR recirculates small amounts of exhaust back into the combustion chambers of the engine in order to decrease the combustion temperature, thereby reducing the formation of smog-producing nitrogen oxides.
Check out this video for a visual reference. If you find carbon buildup, use a speedometer cable and throttle body cleaner to remove carbon blocking any air passages. Check out this video for a visual reference Remove all hoses connected to the intake Remove air intake hose that is connected to the throttle body Remove throttle body Remove intake manifold to inspect for carbon buildup — use speedometer cable and throttle body cleaner to remove carbon buildup Place intake manifold back in and reconnect hoses, throttle body, etc.
If these steps do not clear your Check Engine Light, you may need to visit a mechanic because there may be internal electrical issues. FIXD Team.
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