Update ten posts down.

My 2005 Ford F250 6.0 powerstroke FX4 diesel (150k miles on it) decided it was going to activate the check engine light today. Was really cold today, like -25F. Used my ScanGauge II to check the OBD-II system and found two codes: P0299 and P0470.

Quick Google search states that:
The P0299 DTC code refers to a condition where the PCM/ECM (powertrain/engine control module) has detected that the bank "A" or single turbocharger or supercharger is not providing a normal amount of boost.

The P0470 code is strictly concerned about the incoming signal from the exhaust pressure sensor not matching intake manifold pressure or ambient air pressure at key on. This can be an electrical circuit fault or it can be mechanical.

Thought it could be due to my EGR valve, which was due for a cleaning. I pulled the valve and it was pretty caked on so I cleaned it up good, replaced the gaskets and o-rings, and put it back in. But no dice, codes still there even after clearing them and re-scanning.

Truck seems to be running normal, but I know if I ignore this it will break down one day in the middle of a blizzard with sub-zero temps when my wife is driving it and I'm out of town.

Hoping to get some advice on where to start looking, and which code I should investigate first.

 

Clean your EBP sensor and tube first and then do codes again. It's located on drivers side about half way of engine.

 

^x2

My opinion would be you've got a sensor or wiring issue. While possible, the code telling you the static pressures don't match means you'd have to have a pocket of higher pressure exhaust gas trapped between the manifold and sensor. At KOEO, I would guess that not likely.

Good luck.

 

If you have an early 05 the EBP sensor is mounted on the thermostat housing. I'd also pull the sensor (1" deep socket IIRC) and make sure it's not clogged. Also check tube that it mounts to. You can use some Brake clean and compressed air. Put a blow gun in the fitting whole with it locked on. Then go to the tail pipe and you should hear the air flow. Some use weedwacker trimmer line but the angled bends in the tube make it tough to do.

 

Thanks all, have some time off starting Thursday so I will pull the EBP sensor and tube then to check/clean it. Can I directly access/remove this from below without removing anything else, or is it easier to access from the top by taking off the air filter and hose?

 

All topside.

 

Since this is an almost 11 year old truck with ~150k miles on it should I pull and clean the sensor and tube, or just replace one or both of them?

 

Just cleaning them will be ok. Mines 11 yrs old 172,000 miles still have original.

 

It's your money. If it's working why replace it? Mine's an 05 with almost 170. I check all the sensors every oil change to make sure all is well. When it craps out then I'll update it with the new one and tube.

 

Will pull the sensor and tube, check the integrity, and if booth are still good give them a good cleaning on Thursday. Will be low 20s F by then which is much nicer weather to work on my truck then -20s F like today.

 

Pulled the EBP sensor and tube today and both were pretty coked up. Integrity of both was still good, so I cleaned them up real good and reinstalled them. Also installed a new air filter, even though I still had ~5k miles to go on the old one, figured with the filter and housing out was a good time to do it. Unfortunately no dice, truck is still throwing code P0299 and P0470.

Any more suggestions on what to try next?

 

I have a 03, but cleaning my MAF sensor made my P0299 go away.

When you take off the air intake hose, you can see the MAF sensor wire. Mine looked like clear slime was covering the wire. I sprayed nearly a whole can of MAF cleaning spray on the wire and connections until all of the slime was removed.

My turbo fart also stopped.

 

For your P0229, if you haven't looked at your MAP Sensor, give er an eye or two. Had the same code pop about 2 years ago. Replaced the sensor and cleared the code. Good to go.

 

Given that your EBP and EGR both coked with crud - you need to add a cleaning onto the brass nipple on the intake manifold for the MAP scensor. The nipple is on the passenger side with a shielded hose running from the intake up to the MAP which is bolted to your AC condensing box. The nipple can be cleaned with a spray tube from a can of penetrating oil or string from a weed whacker, the shielded hose could be clogged also though they usually need to be inspected for leaks caused by break down.

You are referencing codes so maybe you have a way to read PID values. At Key On with Engine Not Running, you should see EPS as psi, BARO as inHG, MAP as inHG all basically reading the same as ambient for your elevation. Others will say to look at the Volts for those sensors which is just as good. Without these three in alignment your ECU has no baseline to determine Air manegement commands for the Turbo.