P1204 Code - Fuel System Failure Caused No. 4 Cylinder Misfire
Quick Answer
The P1204 diagnostic trouble code indicates that there is a fuel system failure causing a misfire in the No. Common causes include Clogged or dirty fuel injector in the No, 4 cylinder, Malfunctioning fuel pump not delivering enough fuel to the No. 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
- P1204 indicates Fuel System Failure Caused No. 4 Cylinder Misfire.
- Common causes
- Common causes include Clogged or dirty fuel injector in the No, 4 cylinder, Malfunctioning fuel pump not delivering enough fuel to the No.
- 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 P1204 Description
The P1204 diagnostic trouble code indicates that there is a fuel system failure causing a misfire in the No. 4 cylinder of the vehicle's engine. This issue can have a significant impact on the vehicle's performance, as a misfire in a cylinder can lead to rough idling, decreased power, poor fuel efficiency, and potential engine damage if left unresolved. The fuel system failure could be related to issues such as a clogged fuel injector, fuel pump malfunction, fuel pressure regulator problems, or a faulty fuel filter. It is crucial to address this code promptly to prevent further damage to the engine and ensure the vehicle operates efficiently.
Common Causes of P1204
- Clogged or dirty fuel injector in the No. 4 cylinder.
- Malfunctioning fuel pump not delivering enough fuel to the No. 4 cylinder.
- Faulty fuel pressure regulator affecting fuel distribution.
- Restricted fuel filter impeding fuel flow to the No. 4 cylinder.
- Wiring or electrical issues related to the fuel system components.
Symptoms of P1204
- Rough idling or shaking while the engine is running.
- Decreased acceleration and power.
- Poor fuel economy.
- Engine misfires or stumbling during acceleration.
- Illumination of the check engine light on the dashboard.
How to Fix P1204
- Diagnose the specific cause of the fuel system failure leading to the No. 4 cylinder misfire.
- Inspect and clean or replace the fuel injector in the affected cylinder.
- Test and potentially replace the fuel pump if it is not functioning correctly.
- Check and adjust the fuel pressure regulator as needed.
- Replace the fuel filter to ensure proper fuel flow to the No. 4 cylinder.
Cost to Fix P1204
The cost of repairing a fuel system failure causing a No. 4 cylinder misfire can vary depending on the specific issue that needs to be addressed. On average, the repair costs for this type of problem can range from $200 to $800, including parts and labor. However, it is essential to consider that diagnostic time and labor rates at auto repair shops can fluctuate based on the location, vehicle make and model, and engine type. Rates typically range from $80 to $150 per hour, but they may be higher in metropolitan areas or at dealerships, while independent shops may charge less. To obtain an accurate estimate, it is recommended to consult with local auto repair shops.
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Code P1204 Information for Specific Makes
- P1204 Acura — Fuel System Failure Caused No. 4 Cylinder Misfire
- P1204 Audi — Fuel Injector Circuit Cylinder 4 Electrical Malfunction
- P1204 Honda — Fuel System Failure Caused No. 4 Cylinder Misfire
- P1204 Isuzu — Injector Circuit Open / Shorted Cylinder #4
- P1204 Jaguar — Fuel Injector Circuit Cylinder 4 Electrical Malfunction
- P1204 Volkswagen — Fuel Injector Circuit Cylinder 4 Electrical Malfunction
Frequently Asked Questions about P1204 Code
1. What are the common symptoms of OBDII code P1204 (Fuel System Failure Caused No. 4 Cylinder Misfire)?
- Common symptoms include rough idling, loss of power, engine misfires, increased fuel consumption, and the illumination of the check engine light.
2. What are the possible causes of OBDII code P1204?
- The code P1204 can be caused by issues such as a faulty fuel injector, a vacuum leak, a clogged fuel filter, a malfunctioning fuel pump, or problems with the ignition system.
3. How can I diagnose the root cause of OBDII code P1204?
- Diagnosis typically involves conducting a thorough inspection of the fuel system components, checking for vacuum leaks, testing the fuel injectors, performing a fuel pressure test, and inspecting the ignition system for any faults.
4. Can a clogged fuel filter trigger OBDII code P1204?
- Yes, a clogged fuel filter can restrict fuel flow to the No. 4 cylinder, leading to a lean or rich condition that may cause misfires and trigger the P1204 diagnostic trouble code.
5. Are there any quick repair tips for addressing OBDII code P1204?
- Quick repair tips may include checking and replacing the fuel filter, inspecting and cleaning the fuel injectors, ensuring proper fuel pressure, and performing a tune-up to address any ignition system issues.
6. Is it safe to continue driving with OBDII code P1204 present?
- It is not recommended to continue driving with code P1204 present, as unresolved fuel system issues can lead to further engine damage and potential safety hazards.
7. Can a DIY enthusiast fix OBDII code P1204 at home?
- Depending on the underlying cause, a DIY enthusiast with the necessary tools and knowledge may be able to address code P1204 by inspecting and replacing faulty components in the fuel system.
8. How much can I expect to spend on repairs for OBDII code P1204?
- Repair costs for OBDII code P1204 can vary depending on the specific cause and the extent of the required repairs, but expenses may range from a few hundred to over a thousand dollars.
9. Will resetting the check engine light erase OBDII code P1204?
- Resetting the check engine light may temporarily clear the code, but if the underlying issue causing code P1204 is not addressed, the code is likely to reappear after driving the vehicle for a certain period.
10. Can a misfire in the No. 4 cylinder be caused by issues unrelated to the fuel system?
- Yes, misfires in the No. 4 cylinder can also be caused by problems such as faulty spark plugs, a malfunctioning ignition coil, engine timing issues, or compression problems in the cylinder.
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