AutoCodes – Mercury – P0180 Mercury

P0180 Mercury Code - Engine Fuel Temperature Sensor 'A' Circuit

Quick Answer

The comprehensive component monitor (CCM) monitors the Engine Fuel Temperature (EFT) Sensor circuit to the Powertrain Control Module (PCM) for low and high voltage. Common causes include Faulty Engine Fuel Temperature Sensor, Engine Fuel Temperature Sensor harness is open or shorted, Engine Fuel Temperature Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0180 Mercury indicates Engine Fuel Temperature Sensor 'A' Circuit.
Common causes: Common causes include Faulty Engine Fuel Temperature Sensor, Engine Fuel Temperature Sensor harness is open or shorted, Engine Fuel Temperature Sensor circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 250

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 03, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P0180 Mercury Description

The comprehensive component monitor (CCM) monitors the Engine Fuel Temperature (EFT) Sensor circuit to the Powertrain Control Module (PCM) for low and high voltage. If voltage were to fall below or exceed a calibrated limit and amount of time during testing, the test will fail. Open or short in harness. Low ambient temperature operation.

OBDII Code P0180 Mercury - Engine Fuel Temperature Sensor 'A' Circuit - AutoCodes.com — P0180 Mercury Code - Engine Fuel Temperature Sensor 'A' Circuit

What does this mean?

What are the Possible Causes of the DTC P0180 Mercury?

Faulty Engine Fuel Temperature Sensor
Engine Fuel Temperature Sensor harness is open or shorted
Engine Fuel Temperature Sensor circuit poor electrical connection

How to Fix the DTC P0180 Mercury?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0180 Mercury code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.