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P1538 Diagnostic Trouble Code Discussion for September 2017

Title: Intake Manifold Runner Control Stuck Open (Bank 2)


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Trouble Ticket Help Requests for DTC P1538
Help Request Posted
2012 Porsche Panamera Turbo S 4.8L reduce engine speed VIN: WP0AB2A71C
P1538: fuel cut-off valve -N109- open circuit/short to ground upper limit exceeded. the codes i listed will not clear. during 2 test drives, i never got the reduce engine speed warning. at idle, fuel pressure readings are about 380 kpa - specs according to Alldata are 550 - 580 kpa, so it's a little low of course. we called a friend at the de...
September 12, 2017
2012 Porsche Panamera Turbo S 4.8L reduce engine speed VIN: WP0AB2A71C
P1538: fuel cut-off valve -N109- open circuit/short to ground upper limit exceeded. the codes i listed will not clear. during 2 test drives, i never got the reduce engine speed warning. at idle, fuel pressure readings are about 380 kpa - specs according to Alldata are 550 - 580 kpa, so it's a little low of course. we called a friend at the de...
September 22, 2017