Help deciphering my freeze frame data???
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New User
Joined: Nov 2014
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Help deciphering my freeze frame data???
I'm trying to get to the bottom of a p0174 bank 2 lean code in my 2000 f150 4x4 supercab 5.4L w 166k miles. Freeze frame data is:
DTCFRZF P0102
Fuelsys 1 CL
Fuelsys 2 - - ?
Load_Pct (%) 50.6
Ect (°C) 80
Shrtft 1 (%) 14.8
Longft 1 (%) 4.7
Shrtft 2 (%) 4.7
Longft 2 (%) 16.4
Rpm 1340 ?
Vss (km/h) 16
These are data as they read exactly. Any help in direction to look? Fuel system? I tried to scout for vacuum leak w carb cleaner. No luck. Using a lot more fuel since code thrown. Stalls on takeoff from dead stops
Thanks in advance for any input
DTCFRZF P0102
Fuelsys 1 CL
Fuelsys 2 - - ?
Load_Pct (%) 50.6
Ect (°C) 80
Shrtft 1 (%) 14.8
Longft 1 (%) 4.7
Shrtft 2 (%) 4.7
Longft 2 (%) 16.4
Rpm 1340 ?
Vss (km/h) 16
These are data as they read exactly. Any help in direction to look? Fuel system? I tried to scout for vacuum leak w carb cleaner. No luck. Using a lot more fuel since code thrown. Stalls on takeoff from dead stops
Thanks in advance for any input
Senior User
Joined: Mar 2014
Posts: 433
Likes: 0
From: southern maryland
have your tried looking at your o2 sensor for the bank that is having fuel control issue upstream. they are a very common thing to fail and will lie to you. you must do this with the engine warmed up to operating temp. one thing to note if its dumping fuel that will take its toll on your cats if you have them.
Logistics Pro
Joined: Jan 2001
Posts: 3,740
Likes: 37
From: Central NYS
That freeze frame data was set by the P0102 code (Mass Air Flow Meter voltage is low). Be sure the MAF is plugged in and that it is getting vehicle power when the key is turned on. Is the MAF clean?
Lead Driver
Joined: Sep 2006
Posts: 7,907
Likes: 143
Look at your Long Term Fuel Trim 2 shifted 16.4%.
This table causes the setting of the 174 code after a trigger value is reached for a specified amount of time, and hits from the short term table.
Look at the Short Term Fuel Trim 1 at a shift of 14.8%.
These are verifying you have an issue.
They do not tell you anything specific except there is an air leak in the intake system or some issue causing a lean condition detected by the Ox sensor..
The STFT 1 might be a separate problem or just a freeze frame reading at that moment in time and not a real issue. This table usually does not cause a code to set but there could be exceptions in timing of the events as they happen.
Other data indicates 80c, the engine was not up to temperature at only 176F.
There was a lot of throttle applied at the time of the data FREEZE.
Bottom line is you need the engine up to full temperature first, then look at the data in static form.
Then afterward try a freeze frame run.
After that, put the data together for a trend or picture of what's happening.
As it is now the Scanner is not a large benefit until you learn how to interpret the data. An endeavor that does not come very quickly.
I hope I made some sense of some of your reading for you.
Good luck.
This table causes the setting of the 174 code after a trigger value is reached for a specified amount of time, and hits from the short term table.
Look at the Short Term Fuel Trim 1 at a shift of 14.8%.
These are verifying you have an issue.
They do not tell you anything specific except there is an air leak in the intake system or some issue causing a lean condition detected by the Ox sensor..
The STFT 1 might be a separate problem or just a freeze frame reading at that moment in time and not a real issue. This table usually does not cause a code to set but there could be exceptions in timing of the events as they happen.
Other data indicates 80c, the engine was not up to temperature at only 176F.
There was a lot of throttle applied at the time of the data FREEZE.
Bottom line is you need the engine up to full temperature first, then look at the data in static form.
Then afterward try a freeze frame run.
After that, put the data together for a trend or picture of what's happening.
As it is now the Scanner is not a large benefit until you learn how to interpret the data. An endeavor that does not come very quickly.
I hope I made some sense of some of your reading for you.
Good luck.
Logistics Pro
Joined: Jan 2001
Posts: 3,740
Likes: 37
From: Central NYS
I'm trying to get to the bottom of a p0174 bank 2 lean code in my 2000 f150 4x4 supercab 5.4L w 166k miles. Freeze frame data is:
DTCFRZF P0102
Fuelsys 1 CL
Fuelsys 2 - - ?
Load_Pct (%) 50.6
Ect (°C) 80
Shrtft 1 (%) 14.8
Longft 1 (%) 4.7
Shrtft 2 (%) 4.7
Longft 2 (%) 16.4
Rpm 1340 ?
Vss (km/h) 16
These are data as they read exactly.
DTCFRZF P0102
Fuelsys 1 CL
Fuelsys 2 - - ?
Load_Pct (%) 50.6
Ect (°C) 80
Shrtft 1 (%) 14.8
Longft 1 (%) 4.7
Shrtft 2 (%) 4.7
Longft 2 (%) 16.4
Rpm 1340 ?
Vss (km/h) 16
These are data as they read exactly.
Again, that freeze frame data was triggered by throwing DTC P0102. It was not logged due to a P0174.
Lead Driver
Joined: Sep 2006
Posts: 7,907
Likes: 143
Yes the trigger code was P0102 and gave you the data at that moment.
However the 102 code is still a fault you need to address.
The rest of the data shows the engine not up to temperature and the shift in the trim tables at that moment.
The Air meter circuit is in fault. Maybe it's plug is not seated well if you had things apart looking at the system.
As it is now you have two or more faults present.
It's confusion until you see this.
Good luck.
However the 102 code is still a fault you need to address.
The rest of the data shows the engine not up to temperature and the shift in the trim tables at that moment.
The Air meter circuit is in fault. Maybe it's plug is not seated well if you had things apart looking at the system.
As it is now you have two or more faults present.
It's confusion until you see this.
Good luck.
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