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DTC for which Freeze Frame was storedP0174
Fuel System 1 StatusClosed LoopFuel
System 2 StatusNot Supported
Calculated Load Value83.92 %
Engine Coolant Temperature71 °
CShort Term Fuel Trim – Bank 1-17.97 %
Long Term Fuel Trim – Bank 125 %
Short Term Fuel Trim – Bank 2-16.41 %
Long Term Fuel Trim – Bank 225 %
Engine RPM1462.25
rpmVehicle Speed Sensor72 km/h
Ignition Timing Advance For #1 Cylinder27.5 °
Intake Air Temperature14 °C
Air Flow Rate From Mass Air Flow Sensor25 g/s
Absolute Throttle Position21.57 %
Oxygen Sensor Output Voltage (B1-S1)0.02 V
Short Term Fuel Trim (B1-S1)-17.97 %
Oxygen Sensor Output Voltage (B1-S2)0.02 V
Short Term Fuel Trim (B1-S2)99.22 %
Oxygen Sensor Output Voltage (B2-S1)0.02 V
Short Term Fuel Trim (B2-S1)-16.41 %
Oxygen Sensor Output Voltage (B2-S2)0.02 V
Short Term Fuel Trim (B2-S2)99.22 %
Time Since Engine Start0 sec
Fuel Rail Pressure Relative To Manifold Vacuum267.66 kPa
Commanded Evaporative Purge0 %
Fuel Level Input50.59 %
# Warm-ups since DTC Cleared1 warm-ups
Distance Since DTC Cleared0 km
Evap System Vapor Pressure-34.25 Pa
Barometric Pressure84 kPa
Catalyst Temperature Bank 1 – Sensor 1689.2 °C
Catalyst Temperature Bank 2 – Sensor 1689.2 °C
Control Module Voltage14.6 V
Absolute Load Value0 %
Commanded Equivalence Ratio1Relative Throttle Position9.8 %
Ambient Air Temperature4 °C
Absolute Throttle Position B31.76 %
Accelerator Pedal Position D26.67 %
Accelerator Pedal Position E35.29 %
Accelerator Pedal Position F23.14 %
Commanded Throttle Actuator15.29 %Engine is compensating for the knock sensor issues from previous post look at your LTFT that is way way high.
It is fine to double check your lines etc but, the computer is trying to compensate for something. Like I said in the post before this check your grounds. Also check for a biased aka bad sensor.
I’ll check for grounding problems. Appreciate your looking at the LTFT issue (which is beyond me). Innova is telling me check EGR hose and valve first. Would that case LTFT issue? and if not, what is best guess at sensor I should be checking? THANKS!!!
LTFT is highly unlikely to have messed up the EGR as it would take time for buildup to block it off. Though the other is possible the EGR causing the LTFT as the computer will assume if there is no way to verify the position of the EGR that it is functioning correctly.
Though I still see that as unlikely due to it would increase the temperature of the combustion air and also 80-90% of exhaust gasses are non combustible and help to lower temps in the cylinder by not having as big of a burn and it also helps to burn unburnt fuel left in it along with any other things left in the exhaust mixture.
AKA it gives it less to burn so it would not dump more fuel because of it though a stuck tps would cause large amounts of fuel to be dumped but, it might be the wires not just the sensor itself.
I’m a dummy. I said EGR in last post and Innova was telling me to check PCV and hose – not EGR. I was searching some forums about the LTFT issue and came upon issue of problems with intake manifold gasket(s). Pro mechanic that I go to also said it could be that. So it’s probably looking more like that versus PCV valve (although that too would cause an excess air issue (right?). As you can tell, I am stretching my understanding of all this – but I am trying to learn! And I DO APPRECIATE your replies and input!
PCV is Positive crankcase ventilation. It is mainly there to prevent you from blowing out seals most specifically the valve train cover / rocker cover. Though it can cause all kinds of weird issues and is normally a 5min check. Pull it out shake it if it rattles its good and reinstall. I would check it because it is fast and easy check but, I doubt that would cause your issue.
Improper intake manifold gasket depending on the configuration could do all sorts of things.
If you checked all the stuff I said, at that point I am done hopefully one of the other guys can pickup where I left off.
Thanks again. I’ll check the PCV later today – check for the rattle and I want to check condition of hose. And I think you are right that it probably is not the real problem. If the pro shop I use thinks it’s the intake manifold gasket, that will be the next step, and they will do that work. Since shop I use has already said it’s probably that gasket and mustang forums also list that as issue for high LTFT issues, that could be it (and hopefully is it especially if we go ahead and replace that gasket (which is a number of smaller gaskets).
Replaced the intake manifold gasket and that seems to have solved the problem. But also replacing my K&N air filter (which is oiled) with a stock filter from Motorcraft. We’ve got snow right now so that car is not going outside anytime real soon but hopefully the check engine will not come back on any time soon.
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