AutoCodes – GMC – P1103 2014 GMC Sierra

P1103 2014 GMC Sierra Code - Water In Fuel Signal Message Counter Incorrect

Quick Answer

Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. Common causes include Faulty Water In Fuel Sensor, Water In Fuel Sensor harness is open or shorted, Water In Fuel 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: P1103 2014 GMC Sierra indicates Water In Fuel Signal Message Counter Incorrect.
Common causes: Common causes include Faulty Water In Fuel Sensor, Water In Fuel Sensor harness is open or shorted, Water In Fuel 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 182

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 Sep 26, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1103 2014 GMC Sierra 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 Water In Fuel Signal Message Counter is Incorrect.

OBDII Code P1103 2014 GMC Sierra - Water In Fuel Signal Message Counter Incorrect - AutoCodes.com — P1103 2014 GMC Sierra Code - Water In Fuel Signal Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P1103 2014 GMC Sierra?

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

How to Fix the DTC P1103 2014 GMC Sierra?

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 P1103 2014 GMC Sierra 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 P1103 2014 GMC Sierra code?

Need more information on how to fix the P1103 2014 GMC Sierra 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 P1103 2014 GMC Sierra Code

1. What does the OBDII code P1103 mean on a 2014 GMC Sierra?

The P1103 code indicates an issue with the Water In Fuel (WIF) sensor, specifically that the signal message counter is incorrect or outside the expected range.

2. What are common symptoms of the P1103 code in a 2014 GMC Sierra?

Symptoms may include a "Water in Fuel" warning message on the dashboard, decreased engine performance, rough idling, or hesitation during acceleration.

3. What causes the P1103 code in a GMC Sierra?

This code can be triggered by a malfunctioning Water In Fuel sensor, contaminated fuel, damaged wiring or connections, or a faulty ECM (Engine Control Module) misinterpreting the signal.

4. Can driving with the P1103 code damage my 2014 GMC Sierra?

Driving with this code may lead to engine damage if water contamination is severe, as water in the fuel can harm injectors or other fuel system components.

5. How do I diagnose the P1103 code in my truck?

Start by inspecting the Water In Fuel sensor, checking for contamination in the fuel, and examining the wiring and connectors for damage or corrosion.

6. How do I fix the P1103 code on a 2014 GMC Sierra?

Repairs may involve draining and replacing contaminated fuel, cleaning or replacing the Water In Fuel sensor, repairing damaged wiring, or reprogramming the ECM if necessary.

7. Can a bad fuel filter cause the P1103 code?

While a clogged fuel filter itself doesnâ€™t directly cause this code, it could contribute to water contamination or poor fuel quality, which might trigger the P1103 code.

8. How can I prevent the P1103 code from recurring?

Use high-quality fuel, regularly maintain the fuel system, replace the fuel filter as recommended, and promptly address any water contamination issues.

9. Is the P1103 code specific to diesel engines in the GMC Sierra?

Yes, this code is typically associated with diesel engines, as they are equipped with a Water In Fuel detection system.

10. Do I need special tools to fix the P1103 code on my GMC Sierra?

You may need an OBDII scanner to confirm the code, basic tools to check wiring and connectors, and possibly specialized equipment to replace the Water In Fuel sensor or drain the fuel system.