ECM SYSTEM
WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, DM
1-164
(8) Adaptive Learn (DTC 171, 172, 1161 to 1164)
DTC 171-Adaptive Learn Bank 1 High (Gasoline)
• Hardware: HEGO Sensor (Pre-Catalyst) rich-lean switch rate
• Enabling Conditions: Engine Running in closed loop active mode updating adaptive learn multiplier (CL+Adap
mode)
• Set Conditions: Bank 1 adaptive learn multiplier ≥ +30 % for longer than 3 updates (see below)
• Corrective Action(s): Illuminate MIL
• Emissions related fault
• Possible Causes: See Diagnostic aids below and on next page
DTC 172-Adaptive Learn Bank1 Low (Gasoline)
• Hardware: HEGO Sensor (Pre-Catalyst) rich-lean switch rate
• Enabling Conditions: Engine Running in closed loop active mode updating adaptive learn multiplier (CL+Adap
mode)
• Set Condition: Bank 1 adaptive learn multiplier ≤ 30 % for longer than 3 updates (see below)
• Corrective Action(s): Illuminate MIL
• Emissions related fault
• Possible Causes: See Diagnostic aids below and on next page
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