P1049 2015 GMC Sierra Code - Reductant Injector High Control Circuit High Voltage
Quick Answer
The Reductant Injector is a component of selective catalytic reduction system used to dose the reductant fluid to the exhaust gas and participate in the reduction reactions. Common causes include Faulty Reductant Injector, Reductant Injector harness is open or shorted, Reductant Injector 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
- P1049 2015 GMC Sierra indicates Reductant Injector High Control Circuit High Voltage.
- Common causes
- Common causes include Faulty Reductant Injector, Reductant Injector harness is open or shorted, Reductant Injector 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 P1049 2015 GMC Sierra Description
What are the Possible Causes of the DTC P1049 2015 GMC Sierra?
- Faulty Reductant Injector
- Reductant Injector harness is open or shorted
- Reductant Injector circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P1049 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 P1049 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.
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Frequently Asked Questions about P1049 2015 GMC Sierra Code
1. What does the OBDII code P1049 mean for a 2015 GMC Sierra?
P1049 indicates a "Reductant Injector High Control Circuit High Voltage," meaning the control circuit for the reductant injector is experiencing abnormally high voltage.
2. What are the common symptoms of code P1049 in a 2015 GMC Sierra?
Common symptoms include the check engine light turning on, reduced engine performance, increased emissions, and issues with the diesel exhaust fluid (DEF) system.
3. What causes the P1049 code in a GMC Sierra?
Possible causes include a faulty reductant injector, damaged wiring or connectors in the reductant injector circuit, a defective reductant control module, or corrosion in the electrical connections.
4. Can I keep driving my 2015 GMC Sierra with code P1049?
While the vehicle may still be drivable, ignoring this code can lead to increased emissions and potential DEF system failure. It’s best to address the issue promptly.
5. How do you diagnose the P1049 code on a GMC Sierra?
Diagnosis involves using an OBDII scanner to confirm the code, inspecting the reductant injector circuit for wiring damage, and testing the voltage and resistance in the circuit.
6. How do you repair a P1049 code on a 2015 GMC Sierra?
Repairs may include replacing the reductant injector, repairing or replacing damaged wiring or connectors, and resetting the code with an OBDII scanner after repairs.
7. Can a bad reductant control module cause the P1049 code?
Yes, a malfunctioning reductant control module can cause the circuit to exhibit high voltage, triggering the P1049 code.
8. How much does it cost to fix the P1049 code on a GMC Sierra?
Repair costs vary depending on the issue but typically range from $200 to $600, including parts and labor.
9. What tools are needed to fix the P1049 code on a 2015 GMC Sierra?
You’ll need an OBDII scanner, a multimeter for electrical testing, and basic tools for accessing and repairing wiring or replacing components.
10. Can clearing the P1049 code with a scanner fix the problem?
Clearing the code may temporarily turn off the check engine light, but it won’t fix the underlying issue. Proper repair is necessary to prevent the code from returning.
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