DTC 1

Self-diagnosis LED blinks once:

A problem in the Oxygen (02) Sensor Circuit.

�ZFig. 17 Oxygen Sensor Testing:

The oxygen sensor, detects the oxygen content in the exhaust gas, and inputs the ECU. In operation, the ECU receives the signals from the sensor and varies the duration during which fuel is injected. The oxygen sensors are installed on the exhaust manifold.

The Check Engine warning light and ECU LED may come on, indicating a system problem, when, in fact, there is a poor or intermittent electrical connection. First, check the electrical connections, clean or repair connections if necessary.