P1391 Saab Code - Cylinder 1 Misfire Detected Random Fuel Level Low
Quick Answer
P1391 Saab indicates Cylinder 1 Misfire Detected Random Fuel Level Low. Common causes include Low fuel level, Faulty fuel injector, Fuel injector harness is open or shorted. 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
- P1391 Saab indicates Cylinder 1 Misfire Detected Random Fuel Level Low.
- Common causes
- Common causes include Low fuel level, Faulty fuel injector, Fuel injector harness is open or shorted.
- 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 P1391 Saab Description
What are the Possible Causes of the DTC P1391 Saab?
- Low fuel level
- Faulty fuel injector
- Fuel injector harness is open or shorted
- Fuel Injector circuit poor electrical connection
How to Fix the DTC P1391 Saab?
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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1391 Saab 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 P1391 Saab Code
1. What are common symptoms of OBDII code P1391 on a Saab indicating a cylinder 1 misfire and low fuel level?
- Common symptoms include engine misfires, rough idling, loss of power, poor fuel efficiency, and possibly a low fuel warning light.
2. What are the potential causes of OBDII code P1391 in a Saab related to cylinder 1 misfire and low fuel level?
- Causes may include a faulty ignition coil, worn spark plugs, clogged fuel injectors, low fuel pressure, vacuum leaks, or a failing fuel pump.
3. How can I diagnose the source of OBDII code P1391 in my Saab with cylinder 1 misfire and low fuel level?
- Diagnose by checking the ignition system, inspecting spark plugs, testing fuel injectors, monitoring fuel pressure, and scanning for vacuum leaks using a diagnostic tool.
4. What are some repair tips for addressing OBDII code P1391 on a Saab with cylinder 1 misfire and low fuel level?
- Repair tips include replacing faulty ignition components, installing new spark plugs, cleaning or replacing fuel injectors, addressing fuel delivery issues, and fixing any vacuum leaks.
5. Can driving with OBDII code P1391 on a Saab cause further damage?
- Continued driving with this code may potentially damage the catalytic converter due to unburned fuel entering the exhaust system. It is recommended to address the issue promptly.
6. Are there any preventive measures to avoid OBDII code P1391 in a Saab involving cylinder 1 misfire and low fuel level?
- Regular maintenance, such as timely spark plug replacements, fuel system cleanings, and using high-quality fuel, can help prevent issues leading to this fault code.
7. How much can I expect to pay for professional repairs related to OBDII code P1391 on a Saab?
- Repair costs can vary depending on the specific issue, but expect to pay anywhere from $100 to $500 or more for parts and labor to address cylinder 1 misfire and low fuel level problems.
8. Can I reset the OBDII code P1391 on my Saab myself, or do I need a mechanic?
- You can attempt to clear the code using an OBDII scanner, but it is recommended to address the underlying issue causing the fault code to prevent it from reoccurring.
9. Is it safe to continue driving my Saab with OBDII code P1391 if the symptoms are not severe?
- While mild symptoms may not immediately affect drivability, it is best to have the issue diagnosed and repaired promptly to prevent potential long-term damage to the engine or emissions system.
10. Will fixing OBDII code P1391 on my Saab improve fuel efficiency and performance?
- Yes, addressing this fault code by repairing the cylinder 1 misfire and low fuel level issue can lead to improved fuel efficiency, smoother engine operation, and better overall performance of the vehicle.
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