P1103 2015 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 2015 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.
Code P1103 2015 GMC Sierra Description
What are the Possible Causes of the DTC P1103 2015 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 2015 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 2015 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 2015 GMC Sierra code?
Need more information on how to fix the P1103 2015 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1103 2015 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P1103 2015 GMC Sierra Code
1. What does the OBDII code P1103 mean on a 2015 GMC Sierra?
P1103 indicates that the water-in-fuel sensor has detected an issue with its signal or counter, meaning it might be providing incorrect data to the engine control module (ECM).
2. What are common symptoms of code P1103 in a 2015 GMC Sierra?
Symptoms may include the "Water in Fuel" warning light on the dashboard, poor engine performance, rough idling, and in some cases, difficulty starting the engine.
3. What causes the P1103 code on a GMC Sierra?
The most common causes are a faulty water-in-fuel sensor, contaminated fuel, corroded or damaged wiring, or a malfunctioning ECM.
4. Can driving with P1103 damage my 2015 GMC Sierra?
Driving with this code for an extended period can cause engine damage due to water contamination in the fuel system, especially if the issue is not addressed promptly.
5. How do I fix code P1103 in my GMC Sierra?
Start by draining and replacing the contaminated fuel, inspect and clean the water-in-fuel sensor, and check for damaged wiring or connectors. Replace the sensor if necessary.
6. How can I confirm the P1103 code diagnosis?
Use an OBDII scanner to retrieve the code and verify it. Then test the water-in-fuel sensor and wiring for proper functionality using a multimeter.
7. How much does it cost to repair a P1103 code on a GMC Sierra?
The cost can vary, but replacing the water-in-fuel sensor typically costs $100-$300, depending on labor charges and parts pricing.
8. Can bad fuel cause P1103 on a GMC Sierra?
Yes, poor-quality or contaminated fuel with high water content is a common cause of this code.
9. How can I prevent the P1103 code from reoccurring?
Regularly use high-quality fuel from reputable sources, periodically drain the water separator (if equipped), and maintain the fuel system components.
10. Is a water-in-fuel sensor replacement covered under warranty for a 2015 GMC Sierra?
It depends on your vehicle's warranty and coverage terms. Check with your GMC dealership for specific details.
Discuss the causes and fixes for P1103 2015 GMC Sierra OBDII Code
Code P1103 2015 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
