P1421 INFINITI Possible Causes
- Lack of intake air volume (block air filter)
- Fuel injection system (Clogged fuel injector or bad fuel pump)
- Faulty Engine Control Module (ECM)
First diagnose P1421 INFINITI code
Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded terminals.
Cost of diagnosing the P1421 INFINITI code
Labor: 1.0The cost of diagnosing the P1421 INFINITI code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
When is the P1421 INFINITI code detected?The P1421 code is detected when The Engine Control Module (ECM) does not control ignition timing and engine idle speed properly when engine is started with pre-warming up condition.
P1421 INFINITI Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1421 INFINITI MeaningThe Engine Control Module (ECM) controls ignition timing and engine idle speed when the engine is started with pre-warming up condition. This control promotes the activation of three-way catalyst by heating the catalyst and reduces emissions.
P1421 INFINITI More InformationNeed more information on how to fix the P1421 INFINITI code?
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