Test TC-121B - 1/2 Fuel System Lean
NOTE:
For connector terminal ID, see CONNECTOR IDENTIFICATION Directory. For wiring diagram, see WIRING DIAGRAMS - 2.0L
article.
Inspect all O2 sensor wiring and connectors. Repair wiring and connectors as necessary. Perform TEST VER-2A. If wiring and connectors are okay, perform following tests in order until problem is found:
- Fuel pressure. Perform TEST NTC-3A.
- Ignition system. Perform TEST NTC-2A.
- Coolant temperature sensor. Perform TEST NTC-4A.
- MAP sensor. Perform TEST NTC-6A.
- Engine mechanical systems. Perform TEST NTC-18A.