P0273 Audi Code - Cylinder 5 Injector Circuit Low
Quick Answer
Code P0273 is triggered when the Engine Control Module (ECM) detects a low voltage in the Fuel Injector 5 Circuit. Common causes include Dirty Fuel Injector 5, Faulty Fuel Injector 5, Plugged Fuel Injector 5. 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 Audi indicates Cylinder 5 Injector Circuit Low.
- Common causes
- Common causes include Dirty Fuel Injector 5, Faulty Fuel Injector 5, Plugged Fuel Injector 5.
- 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 P0273 Audi Description
What are the Possible Causes of the DTC P0273 Audi?
- Dirty Fuel Injector 5
- Faulty Fuel Injector 5
- Plugged Fuel Injector 5
- Fuel injector 5 harness is open or shorted
- Fuel injector 5 circuit poor electrical connection
How to Fix the DTC P0273 Audi?
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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0273 Audi 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 P0273 Audi Code
1. What does the OBDII code P0273 mean on an Audi?
P0273 indicates a "Cylinder 5 Injector Circuit Low," meaning the engine control module (ECM) has detected a problem with the fuel injector circuit for cylinder 5, such as low voltage or poor performance.
2. What are the common symptoms of code P0273 in an Audi?
Symptoms include rough idling, engine misfires, reduced fuel efficiency, hesitation during acceleration, and possibly the Check Engine Light turning on.
3. What causes the P0273 code in an Audi?
Common causes include a faulty fuel injector, damaged wiring or connectors in the injector circuit, a malfunctioning ECM, or poor electrical connections in the injector harness.
4. Can a P0273 code cause engine damage if ignored?
If ignored, the code can lead to long-term issues such as engine misfires, unburned fuel damaging the catalytic converter, and overall reduced engine performance.
5. How do you diagnose a P0273 code on an Audi?
Diagnosis involves inspecting the wiring and connectors for cylinder 5's injector, testing the injector with a multimeter, checking for continuity, and possibly swapping the injector with another cylinder to confirm the issue.
6. How do you fix the P0273 code on an Audi?
Repairs may include replacing the faulty injector, repairing damaged wiring or connectors, cleaning the injector connections, or reprogramming or replacing the ECM if necessary.
7. Can a dirty fuel injector cause the P0273 code?
Yes, a clogged or dirty fuel injector may restrict fuel flow and mimic a circuit issue, which can trigger the P0273 code.
8. How much does it cost to fix the P0273 code on an Audi?
Costs vary depending on the issue. Replacing a single fuel injector may cost $150–$400, while wiring repairs or ECM replacement could increase the expense.
9. Is it safe to drive with the P0273 code on my Audi?
It is not recommended to drive for extended periods with this code, as it can cause engine misfires and damage other components like the catalytic converter.
10. Can a weak battery cause the P0273 code in an Audi?
Yes, a weak or failing battery can cause voltage drops in the injector circuit, potentially triggering the P0273 code.
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