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P0068 Saturn Code - MAP/MAF - Throttle Position Correlation

Quick Answer

The P0068 OBD-II diagnostic trouble code (DTC) for Saturn vehicles refers to a problem with the correlation between the Manifold Absolute Pressure (MAP) sensor, Mass Air Flow (MAF) sensor, and Throttle Position Sensor (TPS). Common causes include Faulty MAP, MAF, or TPS sensors, Wiring or connector issues in the sensor circuit, Vacuum leaks in the intake system. 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 Saturn indicates MAP/MAF - Throttle Position Correlation.
Common causes
Common causes include Faulty MAP, MAF, or TPS sensors, Wiring or connector issues in the sensor circuit, Vacuum leaks in the intake system.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code P0068 Saturn Description

The P0068 OBD-II diagnostic trouble code (DTC) for Saturn vehicles refers to a problem with the correlation between the Manifold Absolute Pressure (MAP) sensor, Mass Air Flow (MAF) sensor, and Throttle Position Sensor (TPS). These sensors play crucial roles in the engine's operation by providing data to the engine control module (ECM) for determining fuel delivery and air intake. The ECM uses this information to adjust the air-fuel mixture for optimal combustion. When there is a discrepancy or lack of correlation between these sensors, it can lead to performance issues and potential damage to the engine.

OBDII Code P0068 Saturn - MAP/MAF - Throttle Position Correlation
P0068 Saturn Code - MAP/MAF - Throttle Position Correlation

Common Causes of P0068 Saturn

  1. Faulty MAP, MAF, or TPS sensors
  2. Wiring or connector issues in the sensor circuit
  3. Vacuum leaks in the intake system
  4. Dirty or clogged air filters affecting sensor readings
  5. ECM malfunction or software issues

Symptoms of P0068 Saturn

  1. Engine misfires or rough idling
  2. Hesitation or lack of response during acceleration
  3. Reduced fuel efficiency
  4. Stalling or difficulty starting the engine
  5. Check Engine Light illuminated on the dashboard

How to Fix P0068 Saturn

  1. Perform a thorough inspection of the MAP, MAF, and TPS sensors for any signs of damage or malfunction. Replace any faulty sensors.
  2. Check the wiring harness and connectors for corrosion, damage, or loose connections. Repair or replace as needed.
  3. Inspect the intake system for vacuum leaks and address any leaks found.
  4. Clean or replace air filters to ensure accurate sensor readings.
  5. Reset the ECM and clear the trouble code to see if the issue persists. If the code returns, further diagnostics may be necessary.

Cost to Fix P0068 Saturn

The cost of repairing a P0068 code on a Saturn vehicle can vary depending on the specific cause of the issue and the labor rates in your area. On average, you can expect to pay anywhere from $200 to $500 for parts and labor. Keep in mind that prices for sensors and other components can fluctuate, so it's best to get a quote from a reputable auto repair shop. Additionally, diagnosis time and labor rates can vary, so it's recommended to inquire about these specifics when seeking repairs.

What does this mean?

Tech Notes for P0068 Saturn

On some ION models the problem is an intake leak

When is the Code Detected?

If the PCM detects that the difference between the actual air flow (MAF) and the speed density calculated air flow is greater than expected, DTC P0068 sets.

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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 Saturn Code

1. What does OBDII code P0068 on a Saturn indicate?

- OBDII code P0068 on a Saturn indicates a potential issue with the correlation between the manifold absolute pressure (MAP) sensor, mass airflow (MAF) sensor, and throttle position sensor.

2. What are common symptoms of a P0068 code in a Saturn?

- Common symptoms of a P0068 code in a Saturn may include rough idling, reduced engine power, hesitation during acceleration, and in some cases, the vehicle may go into limp mode.

3. What are possible causes of a P0068 code in a Saturn?

- Possible causes of a P0068 code in a Saturn include a faulty MAP sensor, MAF sensor, or throttle position sensor, vacuum leaks, wiring issues, or a problem with the engine control module (ECM).

4. How can I diagnose a P0068 code in my Saturn?

- Diagnosing a P0068 code in your Saturn typically involves checking the MAP sensor, MAF sensor, and throttle position sensor for proper operation, inspecting for any vacuum leaks, and testing the wiring and connections related to these components.

5. How can I repair a P0068 code in my Saturn?

- Repairing a P0068 code in your Saturn may involve replacing a faulty MAP sensor, MAF sensor, or throttle position sensor, fixing any vacuum leaks, repairing damaged wiring, or reprogramming the ECM if necessary.

6. Can I drive my Saturn with a P0068 code?

- It is not recommended to drive your Saturn with a P0068 code, as it can lead to poor engine performance, reduced fuel efficiency, and potential further damage to engine components if left unresolved.

7. How much does it typically cost to fix a P0068 code in a Saturn?

- The cost to fix a P0068 code in a Saturn can vary depending on the specific cause of the issue, but it may range from $100 to $500 or more, including parts and labor.

8. Will resetting the trouble codes make the P0068 code disappear permanently?

- Resetting the trouble codes may temporarily clear the P0068 code, but if the underlying issue is not addressed and fixed, the code is likely to reappear after driving the vehicle for a certain period of time.

9. Is it possible to prevent the recurrence of a P0068 code in my Saturn?

- Regular maintenance, such as checking and replacing sensors as recommended by the manufacturer, addressing any engine performance issues promptly, and keeping the vehicle in good working condition can help prevent the recurrence of a P0068 code in your Saturn.

10. Can a P0068 code in a Saturn affect the vehicle's emissions?

- Yes, a P0068 code in a Saturn can affect the vehicle's emissions by causing improper air-fuel mixture ratios, potentially leading to increased emissions output and failing emissions tests.

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