AutoCodes – Mercury – P0068 Mercury

P0068 Mercury Code - Manifold Absolute Pressure/Mass Air Flow Sensor - Throttle Position Correlation

Quick Answer

The Powertrain Control Module (PCM) monitors a vehicle operation rationality check by comparing the Throttle Position (TP) to Mass Air Flow (MAF) Sensor readings (if equipped) or to the Manifold Absolute Pressure (MAP) Sensor readings (if equipped). Common causes include Air leak at any connection or line of the intake air system components before or after the Electronic Throttle Body (ETB), Leak in the Positive Crankcase Ventilation (PCV) System, Throttle Position (TP) Sensor not seated correctly. 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: P0068 Mercury indicates Manifold Absolute Pressure/Mass Air Flow Sensor - Throttle Position Correlation.
Common causes: Common causes include Air leak at any connection or line of the intake air system components before or after the Electronic Throttle Body (ETB), Leak in the Positive Crankcase Ventilation (PCV) System, Throttle Position (TP) Sensor not seated correctly.
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 281

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Sep 08, 2023

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
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Code P0068 Mercury Description

The Powertrain Control Module (PCM) monitors a vehicle operation rationality check by comparing the Throttle Position (TP) to Mass Air Flow (MAF) Sensor readings (if equipped) or to the Manifold Absolute Pressure (MAP) Sensor readings (if equipped). This continuous memory Diagnostic Trouble Code (DTC) sets when during a Key ON, Engine Running (KOER) self-test, the comparison of the readings are not consistent with the calibrated load values.

OBDII Code P0068 Mercury - Manifold Absolute Pressure/Mass Air Flow Sensor - Throttle Position Correlation - AutoCodes.com — P0068 Mercury Code - Manifold Absolute Pressure/Mass Air Flow Sensor - Throttle Position Correlation

What does this mean?

What are the Possible Causes of the DTC P0068 Mercury?

Air leak at any connection or line of the intake air system components before or after the Electronic Throttle Body (ETB)
Leak in the Positive Crankcase Ventilation (PCV) System
Throttle Position (TP) Sensor not seated correctly
Faulty Mass Air Flow (MAF) Sensor (if equipped)
Manifold Absolute Pressure (MAP) Sensor (if equipped)
Faulty Throttle Position Sensor

How to Fix the DTC P0068 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 P0068 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.