P1264 Code - Cylinder #4 High To Low Side Short
Quick Answer
The diagnostic trouble code P1264 indicates that there is a short circuit between the high and low sides of cylinder #4. Common causes include Faulty fuel injector in cylinder #4, Wiring harness issues leading to a short circuit, Corrosion or damage to the connectors in the fuel injection system. 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
- P1264 indicates Cylinder #4 High To Low Side Short.
- Common causes
- Common causes include Faulty fuel injector in cylinder #4, Wiring harness issues leading to a short circuit, Corrosion or damage to the connectors in the fuel injection system.
- 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 P1264 Description
The diagnostic trouble code P1264 indicates that there is a short circuit between the high and low sides of cylinder #4. This can be a serious issue as it can affect the fuel injection process, leading to poor engine performance and potential damage to the vehicle if left unaddressed. In a typical fuel injection system, the high side delivers pressurized fuel to the injector while the low side controls the injector's opening and closing. When there is a short between these two sides, it can disrupt the precise timing and amount of fuel injected into the cylinder, causing misfires, rough idling, decreased fuel efficiency, and overall poor engine performance.
Common Causes of P1264
- Faulty fuel injector in cylinder #4.
- Wiring harness issues leading to a short circuit.
- Corrosion or damage to the connectors in the fuel injection system.
- ECM (Engine Control Module) malfunction.
- Poor electrical connections or grounds in the fuel injection system.
Symptoms of P1264
- Engine misfires or hesitation during acceleration.
- Rough idling or stalling.
- Decreased fuel efficiency.
- Check Engine Light illuminated on the dashboard.
- Engine knocking or pinging noises.
How to Fix P1264
- Diagnose the specific cause of the short circuit using a multimeter to test the wiring and components in the fuel injection system.
- Inspect the fuel injector in cylinder #4 for any signs of damage or malfunction.
- Repair or replace any damaged wiring harnesses or connectors in the fuel injection system.
- Reset the ECM to clear the trouble code and retest the system to ensure the issue is resolved.
- Perform a test drive to confirm that the engine is running smoothly and no further issues are present.
Cost to Fix P1264
The cost of repairing a Cylinder #4 High To Low Side Short code can vary depending on the specific cause of the issue and the labor rates at the auto repair shop. On average, the repair cost can range from $200 to $500, including parts and labor. However, it's essential to consider that diagnostic time and labor rates can vary, so it's recommended to obtain a detailed quote from a trusted mechanic before proceeding with the repair.
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Code P1264 Information for Specific Makes
- P1264 Audi — Injector 2 Control Limit Exceeded
- P1264 Ford — Cylinder #4 High To Low Side Short
- P1264 Jeep — Glow Plug #3 Circuit
- P1264 Mazda — Cylinder #4 High To Low Side Short
- P1264 Saab — Throttle Valve Open Accelerator Depressed
- P1264 Volkswagen — Injector 2 Control Limit Exceeded
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