P2157 2017 GMC Sierra Code - Cylinder 4 Injector High Control Circuit High Voltage
Quick Answer
The Engine Control Module (ECM) supplies voltage to each fuel injector on the high control circuits. Common causes include Faulty Fuel Injector 4, Fuel Injector 4 harness is open or shorted, Fuel Injector 4 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
- P2157 2017 GMC Sierra indicates Cylinder 4 Injector High Control Circuit High Voltage.
- Common causes
- Common causes include Faulty Fuel Injector 4, Fuel Injector 4 harness is open or shorted, Fuel Injector 4 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 P2157 2017 GMC Sierra Description
What are the Possible Causes of the DTC P2157 2017 GMC Sierra?
- Faulty Fuel Injector 4
- Fuel Injector 4 harness is open or shorted
- Fuel Injector 4 circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P2157 2017 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 P2157 2017 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 P2157 2017 GMC Sierra code?
Need more information on how to fix the P2157 2017 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P2157 2017 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P2157 2017 GMC Sierra Code
1. What does the OBDII code P2157 mean on a 2017 GMC Sierra?
P2157 indicates a problem in the high control circuit for the injector on cylinder 4, specifically a high voltage condition.
2. What are the common symptoms of code P2157 on a 2017 GMC Sierra?
Symptoms include rough idling, misfires, reduced engine performance, poor fuel economy, and the check engine light illuminating.
3. What causes the P2157 code to appear on a 2017 GMC Sierra?
Common causes include a faulty fuel injector, damaged wiring or connectors in the injector circuit, a malfunctioning ECM, or a short to voltage in the injector control circuit.
4. Can I drive my 2017 GMC Sierra with the P2157 code?
It is not recommended to drive for an extended period with this code, as it can lead to further engine damage or reduced performance.
5. How do I diagnose the P2157 code on my 2017 GMC Sierra?
Diagnosis involves inspecting the wiring and connectors for cylinder 4's injector, testing the injector itself, and using a multimeter to check for high voltage in the circuit.
6. How can I fix the P2157 code on a 2017 GMC Sierra?
Repairs may include replacing the cylinder 4 fuel injector, repairing or replacing damaged wiring or connectors, or reprogramming/replacing the ECM if necessary.
7. What tools do I need to troubleshoot the P2157 code on a 2017 GMC Sierra?
You will need a scan tool to pull the code, a multimeter to test voltage and continuity, and possibly an injector tester for further diagnosis.
8. Could a bad ECM cause the P2157 code on a 2017 GMC Sierra?
Yes, a malfunctioning ECM could cause incorrect voltage signals to the injector, triggering the P2157 code.
9. How much does it cost to repair the P2157 code on a 2017 GMC Sierra?
Repair costs vary but can range from $150 to $600 depending on whether you need a new injector, wiring repairs, or ECM replacement.
10. Will clearing the code fix the P2157 issue on my 2017 GMC Sierra?
Clearing the code will turn off the check engine light temporarily, but it will not resolve the underlying issue, and the code is likely to return.
Discuss the causes and fixes for P2157 2017 GMC Sierra OBDII Code
Code P2157 2017 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.
