2008 4.6 2V Upstream Hose Disconnected Test Failure
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3rd Gear
Joined: Dec 2021
Posts: 3
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2008 4.6 2V Upstream Hose Disconnected Test Failure
I have a new to me 2008 F150 Xl 4x4 with the 4.6 V8 2 valve. I am getting a Upstream Hose Disconnect Test failure in Forscan. The value is 0.282. Minimum is -32.768 and maximum is -32.659 according to the Moe 6 Scan. The downstream, stuck open, and egr flow tests are all ok. What is ging on? I replaced the hose that goes to the DPFE sensor. Had vacuum leak there but thats all good now.
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3rd Gear
Joined: Dec 2021
Posts: 3
Likes: 0
Its not throwing a fault code. Yet anyway. I noticed it in the mode 6 scan after i changed the sparkplugs and a test drive. Here is the EGR section from that scan, [EGR Bank 2]
Upstream Hose Disconnected Test
MID: 32
TID: 82
Value: 0.282 kPa
Min: -32.768 kPa
Max: -32.659 kPa
Downstream Hose Disconnected Test
MID: 32
TID: 83
Value: 0.282 kPa
Min: -3.561 kPa
Max: 32.767 kPa
Stuck Open Valve Test
MID: 32
TID: 84
Value: 0.294 kPa
Min: -32.768 kPa
Max: 4.662 kPa
EGR Flow Test
MID: 32
TID: 85
Value: 14.237 kPa
Min: 1.494 kPa
Max: 32.767 kPa
Everything else passes except the upstream hose disconnect.
Upstream Hose Disconnected Test
MID: 32
TID: 82
Value: 0.282 kPa
Min: -32.768 kPa
Max: -32.659 kPa
Downstream Hose Disconnected Test
MID: 32
TID: 83
Value: 0.282 kPa
Min: -3.561 kPa
Max: 32.767 kPa
Stuck Open Valve Test
MID: 32
TID: 84
Value: 0.294 kPa
Min: -32.768 kPa
Max: 4.662 kPa
EGR Flow Test
MID: 32
TID: 85
Value: 14.237 kPa
Min: 1.494 kPa
Max: 32.767 kPa
Everything else passes except the upstream hose disconnect.
Hotshot
Joined: Jan 2004
Posts: 19,760
Likes: 1,079
From: St Louis
If it's not posting any fault codes, leave it alone. You've gone down a rabbit hole that didn't need to be entered.
Most likely, your PCM needs to be re-flashed to a newer version software that corrects the MIN/MAX limits for MID$32 TID$82. There's a note in the OBDII reference manual (beginning in the '09 edition) regarding this.
Most likely, your PCM needs to be re-flashed to a newer version software that corrects the MIN/MAX limits for MID$32 TID$82. There's a note in the OBDII reference manual (beginning in the '09 edition) regarding this.
Last edited by projectSHO89; Mar 30, 2026 at 08:24 AM.
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