OBDII Code List

P2A00 MERCURY - O2 Sensor Circuit Range/Performance Bank 1 Sensor 1

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3   
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P2A00 MERCURY Possible Causes

  • Faulty Front Heated Oxygen Sensor Bank 1
  • Front Heated Oxygen Sensor Bank 1 harness is open or shorted
  • Front Heated Oxygen Sensor Bank 1 circuit poor electrical connection
  • Inappropriate fuel pressure
  • Faulty fuel injectors
  • Intake air leaks may be faulty
  • Exhaust gas leaks

First diagnose P2A00 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 P2A00 MERCURY code

    Labor: 1.0

    The cost of diagnosing the P2A00 MERCURY code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

P2A00 MERCURY Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P2a00 Mercury Description

The front heated oxygen sensor (or O2 sensor 1) is placed into the exhaust manifold. It detects the amount of oxygen in the exhaust gas compared to the outside air. The heated oxygen sensor 1 has a closed-end tube made of ceramic zirconia. The zirconia generates the voltage from approximately 1V in richer conditions to 0V in leaner conditions. The heated oxygen sensor 1 signal is sent to the Engine Control Module (ECM). The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the radical change from 1V to 0V.
OBDII Code P2a00 Mercury - O2 Sensor Circuit Range/Performance Bank 1 Sensor 1 -

P2A00 MERCURY More Information

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