Mechanics

COMPUTER CODES

1999 Jeep CJ7

Engine problem
1999 Jeep CJ7 6 cyl Four Wheel Drive Automatic 279000 miles

HOW CAN I REPAIR THESE CODES
P0118
P0138

THANKS.
Avatar
Mayan-tj
January 7, 2008.



P0118 is coolant temperature circuit high input, to fix this check the wires going to the coolant sensor and to the wiring harness.

P0138 - Left Bank Downstream or Downstream and Pre-Catalyst o2 Shorted to Voltage low. That is caused bye a bad catalytic converter or a bad pre and after o2 sensor may also be caused due to the P0118 code.

Blackop555
Jan 7, 2008.