AutoCodes – Chevrolet – P1003 2014 Chevrolet Silverado

P1003 2014 Chevrolet Silverado 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 2014 Chevrolet Silverado 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 318

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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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 2014 Chevrolet Silverado 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 2014 Chevrolet Silverado - Fuel Composition Signals Message Counter Incorrect - AutoCodes.com — P1003 2014 Chevrolet Silverado Code - Fuel Composition Signals Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P1003 2014 Chevrolet Silverado?

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 2014 Chevrolet Silverado?

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 2014 Chevrolet Silverado 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 2014 Chevrolet Silverado code?

Need more information on how to fix the P1003 2014 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 P1003 2014 Chevrolet Silverado Code

1. What does the OBDII code P1003 mean on a 2014 Chevrolet Silverado?

P1003 indicates that the fuel composition signal's message counter is incorrect, meaning the vehicle's computer has detected an issue with the data being transmitted by the fuel composition sensor.

2. What are the common symptoms of the P1003 code in a 2014 Silverado?

Symptoms may include poor fuel economy, rough idling, hesitation during acceleration, or an illuminated check engine light.

3. What causes the P1003 code to appear on a 2014 Chevrolet Silverado?

Common causes include a faulty fuel composition sensor, damaged wiring or connectors, or software issues in the Powertrain Control Module (PCM).

4. Can a bad fuel composition sensor trigger the P1003 code?

Yes, a malfunctioning fuel composition sensor is one of the most common reasons for this code, as it affects the accuracy of fuel type and ethanol content readings.

5. How do I diagnose the P1003 code on my 2014 Chevrolet Silverado?

Start by checking the wiring and connectors for the fuel composition sensor, then use a scan tool to monitor the sensor's signal and message counter data for irregularities.

6. Can I still drive my 2014 Silverado with a P1003 code?

While the truck may still be drivable, continued operation can lead to poor performance, reduced fuel efficiency, and potential long-term damage. It's best to address the issue promptly.

7. How can I fix the P1003 code on my 2014 Chevrolet Silverado?

Repairs may include replacing the fuel composition sensor, repairing or replacing damaged wiring, or updating the PCM software if necessary.

8. How much does it cost to repair the P1003 code in a 2014 Silverado?

Repair costs can vary but typically range from $200 to $400 if the fuel composition sensor needs replacement, plus additional labor if wiring or PCM updates are required.

9. Can a software update resolve the P1003 code?

In some cases, a PCM software update from the dealership may resolve the issue, especially if the problem is related to incorrect message counter interpretation.

10. How do I prevent the P1003 code from recurring in my 2014 Silverado?

Regularly inspect and maintain the fuel composition sensor and its wiring, and ensure the vehicle's software is up to date to prevent future issues.