Expedition P00C6 Fuel Rail Pressure Too Low - Engine Cranking (Bank 1)

Andrew Technician Minnesota Posted   Latest  
Resolved
Driveability
2019 Ford Expedition Limited 3.5L (T) 10-spd (10R80) — 1FMJU2AT5KEA27273
P00C6 — Fuel Rail Pressure Too Low - Engine Cranking Bank 1
P0133 — O2 Sensor Circuit Slow Response Bank 1 Sensor 1
MIL On

Customer came in for and oil change and check engine light diag, no other complaints. Lube tech pulled the codes - P00C6 and P0133. By the time I got the vehicle the light had gone off and the P00C6 was not current. Looking through SI the chart for P0133 says if any other faults diagnose those first. The chart for P00C6 asks about additional codes, none of which are set, at which point it goes to symptom based diagnosis.

Looking around online it looks like this code typically sets with a no start due to fuel pump failure, but this thing runs and drives perfectly. I cleared the codes and ran the self test, no codes reset. Road tested for about 10 miles with the same result. Fuel pressure actual and desired match, both high pressure and low.

Is there any testing I can do without any symptoms present? Or do I just need to wait for it to die? Give it back to the customer until it breaks? 

Thanks for reading.

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Cameron Technician
Ontario
Cameron
 

If you've got access to a scope you could put an amp clamp around the B+ to the pump and see what the pattern looks like. As this is a 2019 I'd “hope” the pump is fine but I have had pumps with a few dead spots in the commutator that will behave like a no-start when the dead spot lands just right. Other times there's no apparent problem. I dunno aside from that other than to ship and see..

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Matthew Diagnostician
Kentucky
Matthew
   

Maybe vehicle previously ran out of gas If fault code or symptom is not current then its unlikely to view anything conclusive data wise.

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Agree
Andrew Technician
Minnesota
Andrew
 

If I'm reading the code info correctly, it's setting for the high pressure system. The low pressure system has it's own set of codes, so I have to assume at this point that the low pressure system is working as designed.

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Robert Technician
Michigan
Robert
   

What is the FRPS PID showing KOEO Ford Ecoboost 61-93 psi…. Just browsing couple seconds of ShopKey seen SI twice says start testing after FRPS part cannon P00C6.. Hard to say pretty ;Edit let me clarify & make sense: Snap On SI sure fixes logged tracking were only 3 pumps & 1 FPDM on that 2019 DTC . I don't have time to dig through gobs of Ford info

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Dvir Owner/Technician
Israel
Dvir
 

If the car runing fine with only check engine light check for software updates after this let customer go until its worse

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Disagree
Glenn Owner/Technician
Texas
Glenn
 

Hello Andrew, If it is not a hard code and or a repeatable failure, you would be guessing. There are often problems with vehicles known as “glitches” that can and do correct them self. Check for possible related TSB's or programming updates. If none are found and the problem is cleared, there is not much more that can be done. Bad fuel? Fuel ran to empty, and air entered fuel line aka “ran on…

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Caleb Diagnostician
Indiana
Caleb
 

You have 2 options at this point. 1: Have the customer take the vehicle and return when it acts up again. 2: Have customer pay you by the hour to drive it until it breaks again.

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Funny
Glenn Owner/Technician
Texas
Glenn
 

Hi Caleb, I agree. Is this a parts house “free” “read my codes” scenario and the customer just wants to know why the light is on…? Or do they actually want to pay for a real diagnostic session which cost real money? The oil change fixes all the problems according to some customers. (Pun intended)

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Marlin Technician
Oregon
Marlin
 

How many occurrences are required to illuminated the CEL? In what conditions did the CEL illuminate?

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Glenn Owner/Technician
Texas
Glenn
 

Hi Marlin, I can only go off of past information (I am out of the shop currently). It takes at least 2 drive cycles for the code to come back if it does. There should be info listed in the service information under “code setting criteria” for the codes listed.

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Philip Educator
California
Philip
 

Any chance you captured the Freeze Frame? If not, I'd suggest giving it back to the customer until you can at least know the conditions under which the code set. Otherwise, as suggested by others, whatever you do is guesswork. Customers expect too much of us on intermittent conditions. No one can diagnose a problem that is not there.

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Agree
David Owner/Technician
Alberta
David
 

Andrew, this one is certainly not something I would be getting too concerned with at this point. The code only means it was there and you could not possibly be sure of what is going on at this point. It may well be nothing. Could even be a faulty sensor, how could you possibly know for certain with a one off code and no symptoms other than the code?

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Kyle Mechanic
Illinois
Kyle
 

On intermittent concerns I try to make a habit of analyzing freeze frame data so I can try to duplicate the condition under which it happened.

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Andrew Technician
Minnesota
Andrew Resolution
 

Spoke with the customer and since they weren't experiencing any drivability issues they decided to take the vehicle back. Thank you to everyone that contributed.

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