P1049 2016 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 2016 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 2016 GMC Sierra Description
What are the Possible Causes of the DTC P1049 2016 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 2016 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 2016 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 2016 GMC Sierra Code
1. What does the OBDII code P1049 mean on a 2016 GMC Sierra?
P1049 indicates a "Reductant Injector High Control Circuit High Voltage," meaning the system detects higher-than-expected voltage in the reductant injector circuit.
2. What are the common symptoms of code P1049 in a 2016 GMC Sierra?
Symptoms may 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 2016 GMC Sierra?
Common causes include a faulty reductant injector, wiring or connector issues in the reductant control circuit, a malfunctioning reductant control module, or an electrical short.
4. Can I drive my 2016 GMC Sierra with a P1049 code?
While the vehicle may still drive, continuing to operate it with this code can lead to increased emissions and potential damage to the DEF system.
5. How do I diagnose the P1049 code on a 2016 GMC Sierra?
Diagnose the issue by inspecting the wiring and connectors for damage, testing the reductant injector for proper operation, and using a multimeter to check for high voltage in the circuit.
6. How can the P1049 code be fixed on a 2016 GMC Sierra?
Repairs may include replacing the reductant injector, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the reductant control module.
7. What tools are needed to troubleshoot the P1049 code?
You’ll need an OBDII scanner, a multimeter, and possibly a wiring diagram for the reductant system to properly diagnose the issue.
8. Is the reductant injector the same as the DEF injector?
Yes, the reductant injector is responsible for injecting DEF into the exhaust system to reduce emissions in diesel engines.
9. How much does it cost to repair a P1049 code on a 2016 GMC Sierra?
Repair costs vary but may range from $100 for minor wiring repairs to $500 or more if the reductant injector or control module needs replacement.
10. Can a faulty reductant heater cause the P1049 code on a 2016 GMC Sierra?
No, a reductant heater issue typically triggers a different code. P1049 specifically relates to high voltage in the reductant injector circuit.
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