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1998 Porsche Boxster 2.5L Poor Idle Quality, MIL Lamp on
Posted to European Driveability on 7/20/2009 3 Replies

I have a Boxter with 4 o2s codes PO131,PO137,PO151,PO157 all reading low voltage. I disconnected all o2s and ohmed them out. My result on those were all read OFL. According to alldata they test good. Then I tested then ecm and wiring harness. I checked voltage...

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  Related Documents & Media  1998 Porsche Boxster

 
Message Closed w/FIX

car Vehicle Data

1998 Porsche Boxster

VIN WPOCA298XW
Engine2.5 L / 6 cyl / GAS
Trans5-speed Standard
DeliveryFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, MIL Lamp On
OccursAlways

Trouble Codes

P0131Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Voltage
P0137Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit Low Voltage
P0138Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit High Voltage
P0151Heated Oxygen Sensor (Bank 2 Sensor 1) Circuit Low Voltage
P0157Heated Oxygen Sensor (Bank 2 Sensor 2) Circuit Low Voltage
P0158Heated Oxygen Sensor (Bank 2 Sensor 2) Circuit High Voltage
Message Closed w/FIX

car Vehicle Data

1998 Porsche Boxster

VIN WPOCA298XW
Engine2.5 L / 6 cyl / GAS
Trans5-speed Standard
DeliveryFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, MIL Lamp On
OccursAlways

Trouble Codes

P0131Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Voltage
P0137Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit Low Voltage
P0138Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit High Voltage
P0151Heated Oxygen Sensor (Bank 2 Sensor 1) Circuit Low Voltage
P0157Heated Oxygen Sensor (Bank 2 Sensor 2) Circuit Low Voltage
P0158Heated Oxygen Sensor (Bank 2 Sensor 2) Circuit High Voltage