P1421 MERCURY Possible Causes
- Faulty Catalyst
- Catalyst harness is open or shorted
- Catalyst circuit poor electrical connection
First diagnose P1421 MERCURY 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 MERCURY code
Labor: 1.0The cost of diagnosing the P1421 MERCURY 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.
P1421 MERCURY Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1421 MERCURY MeaningThe Engine Control Module (ECM) monitors the Catalyst. The ECM sets the OBDII code when the Catalyst is not to factory specifications.
P1421 MERCURY More InformationNeed more information on how to fix the P1421 MERCURY code?
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