AutoCodes – Subaru – P0068 Subaru

P0068 Subaru Code - MAP/MAF - Throttle Position Correlation

Quick Answer

The Manifold Absolute Pressure (MAP) Sensor and Mass Airflow (MAF) Sensor are used to inform the Engine Control Module (ECM) of the pressures the intake is experiencing and the amount of the incoming airflow. Common causes include Faulty Manifold Absolute Pressure (MAP) Sensor, Manifold Absolute Pressure Sensor harness is open or shorted, Manifold Absolute Pressure 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: P0068 Subaru indicates MAP/MAF - Throttle Position Correlation.
Common causes: Common causes include Faulty Manifold Absolute Pressure (MAP) Sensor, Manifold Absolute Pressure Sensor harness is open or shorted, Manifold Absolute Pressure 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 5,820

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 Jul 08, 2020

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

The Manifold Absolute Pressure (MAP) Sensor and Mass Airflow (MAF) Sensor are used to inform the Engine Control Module (ECM) of the pressures the intake is experiencing and the amount of the incoming airflow. The Manifold Absolute Pressure Sensor monitors and informs the Engine Control Module of the pressure changes in the intake manifold, whereas the Mass Airflow Sensor measures the amount in the air coming into the intake system. The ECM uses these signals in order to properly compensate fuel control depending on engine load. The Diagnostic Trouble Code (DTC) sets when the MAP and MAF sensor readings are not within the specified range.

OBDII Code P0068 Subaru - MAP/MAF - Throttle Position Correlation - AutoCodes.com — P0068 Subaru Code - MAP/MAF - Throttle Position Correlation

What does this mean?

What are the Possible Causes of the DTC P0068 Subaru?

Faulty Manifold Absolute Pressure (MAP) Sensor
Manifold Absolute Pressure Sensor harness is open or shorted
Manifold Absolute Pressure Sensor circuit poor electrical connection
Faulty Mass Airflow (MAF) Sensor
Mass Airflow Sensor harness is open or shorted
Mass Airflow Sensor circuit poor electrical connection

How to Fix the DTC P0068 Subaru?

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 Subaru 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.

Frequently Asked Questions about P0068 Subaru Code

What does the OBDII code P0068 mean for a Subaru?

The OBDII code P0068 indicates a correlation issue between the Manifold Absolute Pressure (MAP) sensor, Mass Air Flow (MAF) sensor, and the Throttle Position (TP) sensor.

What are common symptoms associated with the P0068 code?

Common symptoms include poor engine performance, reduced fuel efficiency, rough idling, and the check engine light being illuminated.

What are the potential causes of the P0068 code?

Potential causes include a faulty MAP sensor, malfunctioning MAF sensor, a defective throttle position sensor, vacuum leaks, or issues with the engine control module (ECM).

How can I troubleshoot the P0068 code?

To troubleshoot, start by visually inspecting the electrical connectors and vacuum hoses for damage. Then check the MAP, MAF, and TP sensors for proper operation using a multimeter.

What repairs might be necessary to fix the P0068 code?

Repairs may include replacing faulty sensors, repairing vacuum leaks, cleaning the MAF sensor, or reprogramming or replacing the ECM if it is found to be defective.

Can I drive my Subaru with the P0068 code?

While it may be possible to drive with this code, it is not advisable, as it can lead to further engine performance issues and potential damage if left unresolved.

How much does it typically cost to repair the P0068 code?

Repair costs can vary widely based on the underlying cause, but replacing sensors usually ranges from $100 to $600, including parts and labor.

Is the P0068 code specific to Subaru vehicles?

No, the P0068 code can appear in various makes and models, but the symptoms and repairs may differ based on the vehicle's specific systems.

Will clearing the P0068 code fix the problem permanently?

Clearing the code may temporarily turn off the check engine light, but it will not fix the underlying issue. The code is likely to return if the problem is not addressed.