P1668 Audi Code - Fuel Injector 3 Mechanical Fault
Quick Answer
The Fuel Injector is an electronically controlled mechanical device that is supplied with pressurized fuel by the fuel pump and when energized atomizes the fuel into a fine mist so that it can burn easily in the engine. Common causes include Faulty Fuel Injector, Fuel Injector harness is open or shorted, Fuel 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
- P1668 Audi indicates Fuel Injector 3 Mechanical Fault.
- Common causes
- Common causes include Faulty Fuel Injector, Fuel Injector harness is open or shorted, Fuel 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 P1668 Audi Description
The Engine Control Module (ECM) monitors the Fuel Injector. The ECM sets the Diagnostic Trouble Code (DTC) when the Fuel Injector is not to factory specifications.
What are the Possible Causes of the DTC P1668 Audi?
- Faulty Fuel Injector
- Fuel Injector harness is open or shorted
- Fuel Injector circuit poor electrical connection
How to Fix the DTC P1668 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 P1668 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 P1668 Audi Code
1. What does the OBDII code P1668 mean on an Audi?
P1668 indicates a mechanical fault with fuel injector 3, suggesting it may not be delivering fuel properly.
2. What are the common symptoms of code P1668 in an Audi?
Symptoms may include rough idling, engine misfires, reduced fuel efficiency, hesitation during acceleration, and the Check Engine Light turning on.
3. What causes the P1668 code to appear?
Common causes include a clogged or stuck fuel injector, wiring or connector issues, low fuel pressure, or mechanical wear inside the injector.
4. Can I drive my Audi with a P1668 code?
Driving with this code is not recommended as it can lead to poor engine performance, increased emissions, and potential damage to other engine components.
5. How do I diagnose the P1668 code in an Audi?
Start by inspecting the wiring and connectors for injector 3, check fuel pressure, and test the injector itself for mechanical issues or blockages.
6. What tools are needed to troubleshoot the P1668 code?
Basic tools include an OBDII scanner, multimeter, fuel pressure gauge, and potentially an injector testing kit.
7. How do I fix the P1668 code in my Audi?
Repairs may involve cleaning or replacing the fuel injector, repairing damaged wiring or connectors, or addressing any fuel system pressure issues.
8. How much does it cost to fix a P1668 code?
Costs vary depending on the issue, but replacing a single fuel injector typically ranges from $200 to $500, including parts and labor.
9. Can a dirty fuel filter cause the P1668 code?
While a dirty fuel filter can restrict fuel flow, it usually affects all injectors rather than just one. However, it’s worth checking as part of the diagnosis.
10. How can I prevent the P1668 code from occurring again?
Regular maintenance, using high-quality fuel, and periodically cleaning the fuel injectors can help prevent issues with injector 3.
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