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Home >> Nissan-Datsun >> 2003 >> Frontier Base, Standard >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0121, DTC P0122 Or DTC P0123 >> Fail-Safe Mode
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Fail-Safe Mode

When a malfunction is detected, ECM enters fail-safe mode and MIL illuminates. ECM will determine throttle position based on injected fuel amount and engine speed. Therefore, acceleration will be poor.

NOTE: Perform the following DTC confirmation tests in order. If a DTC confirmation test has been previously performed, turn ignition off and wait at least 5 seconds before performing next DTC confirmation test.
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