code po470 and po478
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Joined: Mar 2004
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From: Florida
code po470 and po478
I get those 2 codes through my Superchips tuner. I know they are for the exhaust back presure sensor error and valve high output. What I need to know is where is that sensor located in the EBPV and what else could cause that problem to show up in the codes. Could it be the buterfly getting stuck. Any info on this would help. Thanks
Senior User
Joined: Oct 2004
Posts: 376
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From: South Dakota
DTC470 and DTC478
Continuous DTC P0470 indicates an exhaust back pressure malfunction was detected during normal driving conditions.
Possible causes:
-- damaged EBP sensor
-- damaged connection
-- damaged PCM
DTC P0478 indicates an excessive back pressure condition existed during normal driving.
l Possible causes:
-- stuck EBP butterfly valve
-- restricted exhaust
-- plugged EBP sensor line
-- misadjusted EPR linkage
-- F-Series wastegate turbo may be overboosting
Possible causes:
-- damaged EBP sensor
-- damaged connection
-- damaged PCM
DTC P0478 indicates an excessive back pressure condition existed during normal driving.
l Possible causes:
-- stuck EBP butterfly valve
-- restricted exhaust
-- plugged EBP sensor line
-- misadjusted EPR linkage
-- F-Series wastegate turbo may be overboosting
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rocky3539
1987 - 1996 F150 & Larger F-Series Trucks
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Apr 20, 2007 03:52 PM
