P0273 GMC Code - Cylinder 5 Injector Control Circuit Low Voltage
Quick Answer
The OBD-II trouble code P0273 for GMC vehicles specifically indicates an issue with the Cylinder 5 Injector Control Circuit having low voltage. Common causes include Faulty fuel injector for cylinder 5, Wiring issues such as a short or open circuit, Malfunctioning engine control module (ECM). 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
- P0273 GMC indicates Cylinder 5 Injector Control Circuit Low Voltage.
- Common causes
- Common causes include Faulty fuel injector for cylinder 5, Wiring issues such as a short or open circuit, Malfunctioning engine control module (ECM).
- 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.
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Code P0273 GMC Description
The OBD-II trouble code P0273 for GMC vehicles specifically indicates an issue with the Cylinder 5 Injector Control Circuit having low voltage. This means that the fuel injector for cylinder 5 is not receiving enough voltage to operate properly. Fuel injectors are critical components in the fuel delivery system of modern vehicles, responsible for precisely spraying fuel into the combustion chamber at the right time. When the injector control circuit has low voltage, it can lead to misfires, rough idling, poor acceleration, and decreased fuel efficiency.
Common Causes of P0273 GMC
- Faulty fuel injector for cylinder 5
- Wiring issues such as a short or open circuit
- Malfunctioning engine control module (ECM)
- Poor electrical connection to the injector
- Issues with the power supply to the injector
Symptoms of P0273 GMC
- Rough idling or engine misfires
- Decreased fuel efficiency
- Loss of power or acceleration
- Check Engine Light illuminated
- Engine stalling or hesitation
How to Fix P0273 GMC
- Begin by diagnosing the specific cause of the low voltage issue, using a multimeter to check the voltage at the fuel injector and inspecting the wiring for any signs of damage.
- If the wiring is damaged, repair or replace the affected wires as needed.
- Test the fuel injector for cylinder 5 to determine if it is faulty. If so, replace the injector with a new one.
- Check the engine control module (ECM) for any faults or errors, and replace if necessary.
- Clear the diagnostic trouble codes, reset the ECM, and perform a test drive to ensure the issue has been resolved.
Cost to Fix P0273 GMC
The cost of repairing a Cylinder 5 Injector Control Circuit Low Voltage issue can vary depending on the specific cause of the problem. In general, replacing a fuel injector can range from $150 to $300 per injector, with additional costs for labor. Wiring repairs may cost between $50 to $150, while an engine control module replacement can range from $200 to $500. Overall, the total repair cost for this issue could be anywhere from $300 to $1000, including parts and labor. It is recommended to consult with a professional mechanic to get an accurate estimate based on the specific circumstances of your vehicle.
Tech Notes for P0273 GMC
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Information for Specific GMC Models
- P0273 2014 GMC Sierra — Cylinder 5 Injector Control Circuit Low Voltage
- P0273 2015 GMC Sierra — Cylinder 5 Injector Control Circuit Low Voltage
- P0273 2016 GMC Sierra — Cylinder 5 Injector Control Circuit Low Voltage
- P0273 2017 GMC Sierra — Cylinder 5 Injector Control Circuit Low Voltage
- P0273 2018 GMC Sierra — Cylinder 5 Injector Control Circuit Low Voltage
Frequently Asked Questions about P0273 GMC Code
1. What does the OBDII code P0273 mean on a GMC vehicle?
P0273 indicates that the Engine Control Module (ECM) has detected a low voltage issue in the injector control circuit for cylinder 5.
2. What are the common symptoms of a P0273 code on a GMC?
Symptoms may include poor engine performance, rough idling, reduced fuel efficiency, difficulty starting, or the check engine light being illuminated.
3. What causes the P0273 code on a GMC?
Causes can include a faulty fuel injector, damaged wiring or connectors in the injector circuit, a malfunctioning ECM, or low system voltage.
4. Can I drive my GMC with a P0273 code?
Driving with this code is not recommended as it may lead to reduced performance, increased emissions, and potential engine damage over time.
5. How is the P0273 code diagnosed on a GMC?
A technician will inspect the injector wiring and connectors for damage, test the injector itself, verify proper voltage and ground, and possibly test the ECM for proper operation.
6. How do I fix the P0273 code on my GMC?
Repairs may involve replacing a faulty injector, repairing or replacing damaged wiring, cleaning corroded connectors, or replacing a malfunctioning ECM if necessary.
7. How much does it cost to repair a P0273 code on a GMC?
Costs vary depending on labor rates and the specific issue but can range from $150 to $500, with injector replacement being the most common expense.
8. Can a low battery cause the P0273 code?
Yes, a low or failing battery can cause voltage issues in the injector circuit, potentially triggering the P0273 code.
9. Is it possible for the P0273 code to be a false reading?
While rare, it is possible if there is an intermittent electrical issue, incorrect ECM programming, or a diagnostic tool error.
10. How can I prevent the P0273 code from reoccurring on my GMC?
Regular maintenance, including inspecting and cleaning injector wiring, ensuring proper battery voltage, and using quality fuel, can help prevent this code.
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