Check engine

Tiny
PATTON
  • MEMBER
  • 1997 JEEP CHEROKEE
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 212,000 MILES
Have 97 jeep grand cherokee have code po138 02 sensor which one is it and where
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Wednesday, January 5th, 2011 AT 1:04 AM

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Tiny
OBXAUTOMEDIC
  • EXPERT
Hello,

P0138 Oxygen Sensor Circuit High Voltage (Bank 1 Sensor 2)

Bank 1 is Driver Side

Sensor 2 is the downstream sensor, or the next sensor down. There is one in each exhaust manifold (sensor 1) and and depending on if your vehicle has 3 or 4 sensors they will be down by the catalytic converter(sensor 2)

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Wednesday, January 5th, 2011 AT 1:46 AM

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