Engine-Codes - Mercury - P1127 MERCURY

P1127 MERCURY Code - Exhaust Not Warm Enough Downstream O2 Sensor Not Tested

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3
Table of contents

|P1127 MERCURY code possible causes

  • Faulty O2 Sensor Heaters
  • O2 Sensor Heaters harness is open or shorted
  • O2 Sensor Heaters circuit poor electrical connection

|How is the P1127 MERCURY code repair?

Start by checking 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 connector's pins.

|What is the cost to diagnose the P1127 MERCURY code

Labor: 1.0

The cost to diagnose the P1127 MERCURY code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|What are P1127 MERCURY code possible symptoms?

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

|What is P1127 MERCURY code meaning?

The heated oxygen sensor (HO2S) monitor uses an exhaust temperature model to determine when the HO2S heaters are cycled ON. The test fails when the inferred exhaust temperature is below a minimum calibrated value.

|Need more information with the P1127 MERCURY code?

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|Need help with a P1127 MERCURY code?

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