Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSNISSAN-DATSUN2003FRONTIER BASE, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - SELF-DIAGNOSTICSDIAGNOSTIC TESTSDTC P1402: EGR FUNCTIONDTC CONFIRMATION TEST (USING CONSULT-II)
2003 Nissan-Datsun Frontier Base, Standard
DTC Confirmation Test (Using CONSULT-II)
2003 Nissan-Datsun Frontier Base, StandardSECTION DTC Confirmation Test (Using CONSULT-II)
- Turn ignition on. Select DATA MONITOR mode with CONSULT-II. Ensure the following conditions are met:
- COOLAN TEMP/S: 14-140°F (-10-60°C).
- EGR TEMP SEN: less than 3.7 volts.
- Turn ignition off and wait at least 5 seconds. Turn ignition on. Select EGR SYSTEM P1402 of EGR SYSTEM in DTC WORK SUPPORT mode with CONSULT-II.
- Press START. Follow instructions displayed on CONSULT-II. Start engine and let it idle until TESTING on CONSULT-II changes to COMPLETED (it will take 60 seconds or more).NOTE: If TESTING is not displayed after 5 minutes, turn ignition off and allow engine to cool until COOLAN TEMP/S: indicates 14-140°F (-10-60°C). Retry from step 2 .
- Press SELF-DIAG RESULTS. If OK is displayed, system is okay at this time. If NG is displayed, go to DIAGNOSTIC PROCEDURE .
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.