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P1123 Diagnostic Trouble Code Discussion for July 2009

Throttle Position 'A' Signal In Range (But Lower Than Expected)


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Trouble Ticket Help Requests for DTC P1123
Help Request Posted
1999 Porsche Boxster 2.5L Hesitation, Poor Fuel Economy, MIL Lamp on VIN: WP0CA2980X
P1123: system at rich limit at idle cyl 1-3. Car came in with p1600 and p1123 and p1125 and a k&n. Changed filter and maf because of contamination. Fuel pressure is right at factory specs. Smoked intake found leaking oil fill pipe. Replaced pipe. LTFT was b 1 6% b 2 11% replaced oil seperator at same...
July 23, 2009
1999 Porsche Boxster 2.5L Hesitation, Poor Fuel Economy, MIL Lamp on VIN: WP0CA2980X
P1123: system at rich limit at idle cyl 1-3. Car came in with p1600 and p1123 and p1125 and a k&n. Changed filter and maf because of contamination. Fuel pressure is right at factory specs. Smoked intake found leaking oil fill pipe. Replaced pipe. LTFT was b 1 6% b 2 11% replaced oil seperator at same...
July 23, 2009