[SOLVED] P1086 Code: Fix Rich Fuel Mixture – Bank 2 Sensor 1

The automobile fault code P1086 indicates a problem with the engine, as the Engine Light or Service Engine Soon Warning Light will be illuminated. The possible causes for this fault code include a faulty crankcase ventilation control valve, damage or loose air intake tube, faulty mass air flow (MAF) sensor, faulty ignition coil(s), faulty spark plugs, insufficient fuel pressure, or a large vacuum leak on the engine.

To fix this issue, you should check the possible causes mentioned above, visually inspect the related wiring harness and connectors, and look for any damaged components or broken, bent, pushed out, or corroded connector pins. The repair time for this issue is estimated to be around 1.0.

Repair Importance Level10.0 (Out of 10)
Estimated Repair TimeApproximately 1.0 hour
Repair Difficulty Level6.67 (Out of 10)

When the engine light is on or the service engine soon warning light is illuminated, it could be a sign of the p1086 fault code.

  • The symptoms of the automobile fault code p1086 include the Engine Light being ON and the Service Engine Soon Warning Light being illuminated.

The automobile fault code p1086 can be caused by a faulty crankcase ventilation control valve, damage or loose air intake tube, faulty MAF sensor, faulty ignition coil(s), faulty spark plugs, insufficient fuel pressure, or a large vacuum leak on the engine.

  • The fault code P1086 can be caused by a faulty crankcase ventilation control valve, damage or loose air intake tube, a faulty mass air flow (MAF) sensor, faulty ignition coil(s), faulty spark plugs, insufficient fuel pressure, and a large vacuum leak on the engine.

To fix fault code p1086, start by visually inspecting the wiring harness, connectors, and components for any damage or corrosion.

  • To fix the automobile fault code p1086, start by checking the possible causes mentioned above.
  • Then, visually inspect the wiring harness and connectors related to the issue.
  • Look for any damaged components and check for broken, bent, pushed out, or corroded connector pins.
  • This fix is estimated to take approximately 1.0 hour.

The factors influencing the diagnosis and fixing cost of automobile fault code p1086 are the estimated repair time of 1.0 hour and the average hourly rate charged by auto repair shops, which ranges between $75 and $150.

The P1086 fault code indicates that the fuel control mixture in Bank 2 of the engine is too rich. This means that there is an excess of fuel in the air-fuel mixture, which can negatively impact the engine’s performance and fuel efficiency. The ideal air-fuel ratio for a gasoline engine is 14.7:1, but different operating conditions may require adjustments.

During full-throttle operation, a rich mixture is needed for maximum power output. However, if the air-fuel mixture becomes too rich, with a lambda value less than 1, it can lead to inefficient combustion and reduced power. In the case of the P1086 fault code, Bank 2 of the engine is experiencing this rich mixture condition.

This could be caused by a variety of factors, such as a malfunctioning oxygen sensor, a clogged fuel injector, or a problem with the fuel pressure regulator. To fix this issue, it is important to diagnose the specific cause of the rich mixture in Bank 2.

This may involve inspecting and testing the oxygen sensor, fuel injectors, and fuel pressure regulator.

Once the faulty component is identified, it can be repaired or replaced to restore the proper air-fuel ratio and improve the engine’s performance and fuel efficiency.

What are the possible causes of the automobile fault code P1086?

If you’re seeing the engine light on or the service engine soon warning light, the fault code P1086 could be the culprit. This code can be caused by a few different things, including a faulty crankcase ventilation control valve, damage or a loose air intake tube, a faulty mass air flow (MAF) sensor, faulty ignition coil(s), faulty spark plugs, insufficient fuel pressure, or a large vacuum leak on the engine. To fix this issue, start by checking the possible causes mentioned above. Take a close look at the wiring harness and connectors, inspect for any damage, and check for broken, bent, pushed out, or corroded connector pins.

How can I visually inspect the wiring harness and connectors to fix the fault code P1086?

If you’re dealing with the fault code P1086 and your engine light is on, there are a few things you can visually inspect to fix the issue. Start by checking the crankcase ventilation control valve, air intake tube, mass air flow sensor, ignition coil(s), spark plugs, fuel pressure, and any potential vacuum leaks on the engine. Take a close look at the wiring harness and connectors, making sure there are no damaged components and checking for any broken, bent, pushed out, or corroded pins on the connectors. This thorough inspection can help you identify and resolve the problem.

What should I look for when checking for damaged components and connector pins to resolve the fault code P1086?

If you’re dealing with the fault code P1086 and your engine light is on, there are a few things you should check. Start by inspecting the crankcase ventilation control valve, the air intake tube, and the mass air flow sensor for any damage or looseness. Next, take a look at the ignition coil(s), spark plugs, and fuel pressure to ensure they’re functioning properly. Finally, don’t forget to visually inspect the wiring harness and connectors for any signs of damage, and check for broken, bent, pushed out, or corroded connector pins.

p1086 error fault code explained

If your engine light is on, it could be due to a faulty crankcase ventilation control valve, damaged or loose air intake tube, faulty MAF sensor, ignition coil(s), spark plugs, insufficient fuel pressure, or a large vacuum leak on the engine.

To fix this, visually inspect the wiring harness and connectors for any damage, and check for broken, bent, pushed out, or corroded connector pins.

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