2002 F250 SD 4X4 5.4 Auto ~58,000 mi

The check engine light came on while my son was driving to work this morning. It came on during warm up on a cold morning (15 degrees), and has stayed on ever since. The truck seems to be running fine .... cannot feel or hear a problem.

The boy stopped at the AutoZone parts store, and thier Actron code reader gave ...... "P1152 control fuel & air metering"

I've been looking around on the internet, and more than one web site stated that a P1152 error code does not usually mean an oxygen sensor problem. Those web sites said to treat the condition as a P1130 error code. Here is a description of that ......

<TABLE cellSpacing=0 cellPadding=3 border=1><TBODY><TR borderColor=#000000 bgColor=#cccccc><TD vAlign=top align=left>P1130 - Lack of HO2S-11 Switch, Fuel Trim at Limit</TD><TD vAlign=top align=left>The HEGO Sensor is monitored for switching. The test fails when the HO2S fails to switch due to circuit or fuel at or exceeding a calibrated limit.</TD><TD vAlign=top align=left>

• Electrical:
  • Short to VPWR in harness or HO2S
  • Water in harness connector
  • Open/Shorted HO2S circuit
  • Corrosion or poor mating terminals and wiring
  • Damaged HO2S
  • Damaged PCM
• Fuel System:
  
  • Excessive fuel pressure
  • Leaking/contaminated fuel injectors
  • Leaking fuel pressure regulator
  • Low fuel pressure or running out of fuel
  • Vapor recovery system
• Induction System:
  
  • Air leaks after the MAF
  • Vacuum Leaks
  • PCV system
  • Improperly seated engine oil dipstick
• EGR System:
  
  • Leaking gasket
  • Stuck EGR valve
  • Leaking diaphragm or EVR
• Base Engine:
  
  • Oil overfill
  • Cam timing
  • Cylinder compression
  • Exhaust leaks before or near the HO2S(s)

</TD><TD vAlign=top align=left>A fuel control HO2S PID switching across 0.45 volt from 0.2 to 0.9 volt indicates a normal switching HO2S</TD></TR></TBODY></TABLE>

Here is a Ford article, from 2001, that states the same thing ...

http://fordfuelinjection.com/files/HEGO_OBDII.pdf

Anyway, does anyone have any experience with a P1152 error code?

Thanks
Jim

 

Is the HO2S (hot oxygen sensor) what is commonly referred to here as the oxygen sensors, that sometimes go bad?

Someone said that if the truck is running fine, then the oxygen sensor is probably bad. I should find out from the error code manuals which bank the sensor is on and change it.

Thanks, Jim

 

This can be a difficult code to trouble shoot because.When the code reader pulls the code it may not have been the initial code but a resulting code from action taken by the pcm.
Let me try to explain, the pcm was trying to adjust fuel trims for what the 02 sensors were seeing in exhaust.(A rich condition or a lean condition) But what happened was the adjustment that the pcm did was far beyond the switching capability of the 02 sensors.When running 02 sensors switch back and forth with their voltages based on 02 content in the exhaust. In this case they have stopped switching because their out of range(stored in the pcm as operating table )
Or it can be the 02 sensor bad.
OBDII can be so misleading at times.

Also most simple code readers only pickup the first code they see and that is where most autzone guys stop.Meaning that there are usually other codes in there that happened before the one they give you.
My code reader will post all the DTCS that happen in the order that they happened.
It kind of leaves a story to back track on.


Okay enough said on that
Is this truck stock no exhaust system changes?
No air tube changes or k+N air filter being used?


If the engine apears to be running fine.I would look at the wiring for the 02 sensors first to see that nothing is burned or broken.
Then I would look at vacum leaks (chk all hoses) because this happen on a cold morning.The intake manifold on these engines are sealed by rubber o-rings and they can fail in the cold.
In the cold the things shrink causing leaks so unmetered air can get into the
system an cause a lean condition.
I would clean the maf with some carb cleaner.

IF you find nothing with the wiring for the 02 sensor.I would clear the code by disconnecting the battery for 5-10 mins.The chk engine light will go out .
But if the light comes on right away after starting the engine then I would suspect the 02 sensor failure.The pcm test the 02 sensor right after start up
if it has a problem it will post the light right away.

If the light stays off,it will come back after so many drive cycles this points
to vacum leaks (hoses ,intake o-rings)
I only say this because it happened in the cold on start up.

If you look at the list they give you.It could also be a rich condition.
Excessive fuel pressure or leaky fuel injectors or egr valve

But with my expierence and with you saying it happened on a cold day
I'd go with a lean condition or unmetered air getting in.

Rich

 

thanks alot, Rich. I will get the truck from my son friday, and we'll check out things you suggest. (the light is still on. and the engine still seems to be running fine)

Jim

 

Thanks, again Rich.

I could not find any wire problems with the sensor, so I disconnected the battery to reset things, and the check engine light has remained off for a few days now.

I'm going to be checking each hose one by one, and it will be down to the low teens each night this week, so maybe I'll find something.

And the truck is completely stock .... no exhaust or intake changes (except for using a Purolator air filter instead of the Motorcraft).

Jim
2002 F250 SD CC 5.4 Auto 4X4