Toyota Camry Manual page 1302

8 Check for open and short in harness and connector between ECM and heated
oxygen sensors (bank1, 2 sensor1) (See page SF–71).
OK
Replace heated oxygen sensors
(bank1, 2 sensor1).
9 Perform confirmation driving pattern (See page DI–255).
Go
10 Is there DTC P0171 or P0172 being output again ?
NO
11 Did vehicle runs out of fuel in the past ?
YES
DTC P0171 or P0172 is caused by running out of fuel.
DIAGNOSTICS – ENGINE (1MZ–FE)
NG Repair or replace harness or connector.
YES Check and replace ECM.
NO Check for intermittent problems.
Author : Date :
DI–275
510