AutoCodes
 
OBDII Code List
 
P2A04 MERCURY

P2A04 MERCURY - Oxygen Sensor Circuit Range/Performance Bank 2 Sensor 2

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3   
Comments  |  Add Comment

Possible causes

  • Faulty Rear Heated Oxygen Sensor Bank 2
  • Rear Heated Oxygen Sensor Bank 2 harness is open or shorted
  • Rear Heated Oxygen Sensor Bank 2 circuit poor electrical connection

Tech notes

Replacing the rear O2 Sensor bank 2 usually takes care of the problem.

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • High Fuel Consumption
  • Excessive Smoke from Exhaust

P2a04 Mercury Description

The Powertrain Control Module (PCM) monitors the Heated Oxygen Sensor (HO2S) for an out of range low voltage concern. The P2A04 code sets if the HO2S voltage is out of range low for a calibrated period of time.
OBDII Code P2a04 Mercury - Oxygen Sensor Circuit Range/Performance Bank 2 Sensor 2 - AutoCodes.com

Need more help?

Get the P2a04 Mercury code diagnosed by a professional: Find a repair shop in your area

Related Information

P2A04 MERCURY Comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the P2a04 Mercury code? Have you replaced any parts?
Any information is appreciated. Thanks
Top ⇧