P1048 2016 GMC Sierra Code - Reductant Injector High Control Circuit Low 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
- P1048 2016 GMC Sierra indicates Reductant Injector High Control Circuit Low 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 P1048 2016 GMC Sierra Description
What are the Possible Causes of the DTC P1048 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 P1048 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 P1048 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 P1048 2016 GMC Sierra Code
1. What does the OBDII code P1048 mean on a 2016 GMC Sierra?
P1048 indicates a problem with the reductant injector high control circuit, specifically low voltage detected in the circuit.
2. What are the common symptoms of P1048 in a 2016 GMC Sierra?
Symptoms include the check engine light turning on, reduced engine performance, possible Diesel Exhaust Fluid (DEF) system warnings, and higher emissions.
3. What causes the P1048 code in a GMC Sierra?
Common causes include damaged wiring or connectors in the reductant injector circuit, a faulty reductant injector, or issues with the vehicle’s control module.
4. Can I drive my 2016 GMC Sierra with code P1048?
Driving with P1048 can lead to increased emissions and potential DEF system malfunctions. It’s recommended to address the issue promptly to avoid further damage.
5. How do I diagnose the P1048 code in my GMC Sierra?
Diagnosis involves inspecting the wiring and connectors for damage, testing the reductant injector for proper operation, and checking the voltage and resistance in the control circuit.
6. How do I fix the P1048 code on a 2016 GMC Sierra?
Repairs may include replacing damaged wiring, fixing faulty connectors, replacing the reductant injector, or reprogramming the control module if necessary.
7. What tools are needed to diagnose P1048 on a GMC Sierra?
You’ll need an OBDII scanner, a multimeter for voltage testing, and potentially wiring diagrams specific to the reductant injector circuit.
8. How much does it cost to repair the P1048 code on a 2016 GMC Sierra?
Repair costs can vary but may range from $150 to $500 depending on whether the issue is with wiring, the injector, or the control module.
9. Can a faulty reductant injector cause code P1048?
Yes, a malfunctioning reductant injector can cause low voltage in the control circuit, triggering the P1048 code.
10. Is P1048 specific to diesel vehicles like the GMC Sierra?
Yes, P1048 is typically related to the Diesel Exhaust Fluid (DEF) system and is found in diesel-powered vehicles like the GMC Sierra.
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