AutoCodes – Buick – P1003 Buick

P1003 Buick Code - Fuel Composition Signals Message Counter Incorrect

Quick Answer

Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. Common causes include Faulty Fuel Composition Sensor, Fuel Composition Sensor harness is open or shorted, Fuel Composition 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: P1003 Buick indicates Fuel Composition Signals Message Counter Incorrect.
Common causes: Common causes include Faulty Fuel Composition Sensor, Fuel Composition Sensor harness is open or shorted, Fuel Composition 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 721

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 Aug 18, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1003 Buick Description

Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. Operating information and commands are exchanged among the control modules. Each module on the serial data circuit maintains a transmit error counter and a receive error counter. The counter values increase with detected errors and decrease with error-free messages. The Diagnostic Trouble Code (DTC) will be set when the Fuel Composition Signals Message Counter Incorrect.

OBDII Code P1003 Buick - Fuel Composition Signals Message Counter Incorrect - AutoCodes.com — P1003 Buick Code - Fuel Composition Signals Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P1003 Buick?

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

How to Fix the DTC P1003 Buick?

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 P1003 Buick 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.

Need more information about the P1003 Buick code?

Need more information on how to fix the P1003 Buick code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1003 Buick code diagnosed by a professional: Find a repair shop in your area

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 P1003 Buick Code

1. What are the common symptoms of OBDII code P1003 in a Buick related to Fuel Composition Signals Message Counter Incorrect?

- Common symptoms may include rough idling, poor fuel economy, and potentially an illuminated check engine light.

2. What are some possible causes of OBDII code P1003 in a Buick?

- Possible causes may include a faulty fuel composition sensor, issues with the fuel system, or a problem with the engine control module (ECM).

3. How can I diagnose the source of OBDII code P1003 in my Buick?

- To diagnose the issue, it is recommended to use an OBDII scanner to retrieve the specific trouble code and then inspect the fuel composition sensor, fuel system components, and ECM for any faults.

4. Is it safe to continue driving with OBDII code P1003 in a Buick?

- It is generally not recommended to continue driving with this code present, as it can lead to poor engine performance and potential damage if left unresolved.

5. How can I repair OBDII code P1003 in my Buick?

- Repair steps may include replacing the faulty fuel composition sensor, addressing any fuel system issues, or reprogramming the ECM to correct the message counter discrepancy.

6. Can I reset the OBDII code P1003 in my Buick using a simple reset tool?

- While you can reset the code with a diagnostic tool, it is important to address the underlying issue causing the code to prevent it from reoccurring.

7. Will OBDII code P1003 affect my Buick's emissions or overall performance?

- Yes, unresolved issues related to this code can impact emissions output and potentially lead to decreased performance and fuel efficiency.

8. Are there any maintenance tips to prevent OBDII code P1003 from appearing in my Buick?

- Regularly servicing your Buick, including fuel system inspections and sensor checks, can help prevent issues that trigger this code.

9. Can extreme weather conditions contribute to triggering OBDII code P1003 in a Buick?

- Extreme weather conditions can potentially affect sensor readings and fuel composition, leading to issues that trigger this code.

10. How long does it typically take to repair OBDII code P1003 in a Buick?

- The repair time can vary depending on the exact cause of the issue, but it may range from a quick sensor replacement to more in-depth diagnostics and repairs.