If you see the Engine Light ON or Service Engine Soon Warning Light, it could be due to the P2191 fault code.

This code indicates that the fuel mixture is too lean, which can cause damage to the engine over time.

The possible causes of this fault code include a faulty fuel injector, Mass Air Flow (MAF) sensor, low fuel pressure, faulty front HO2S, leak in the exhaust system, or faulty PCV system. The repair importance of this code is high as it can lead to engine damage if not addressed promptly. The repair difficulty is moderate, and the fix involves visually inspecting the related wiring harness and connectors, checking for damaged components, and looking for broken, bent, pushed out, or corroded connector’s pins.

The repair time is estimated to be around 1.0 hour.

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

If you notice the Engine Light ON (or Service Engine Soon Warning Light), it could be a sign of p2191 fault code.

Here are the symptoms to look out for:

  • The P2191 fault code in automobiles can cause the following symptoms: Engine Light ON, Service Engine Soon Warning Light, decreased fuel efficiency, rough idling, engine stalling, difficulty starting the engine, and poor acceleration.
  • It can also cause the vehicle to emit black smoke from the exhaust and produce a strong fuel odor.
  • These symptoms can be caused by a variety of issues, including a faulty oxygen sensor, a damaged fuel injector, or a malfunctioning fuel pressure regulator.
  • It is important to address these symptoms promptly to prevent further damage to the vehicle and ensure safe driving conditions.

P2191 fault code in automobiles can be caused by a range of issues, including faulty fuel injectors, MAF sensors, low fuel pressure, and more.

  • The automobile fault code P2191 can be caused by a faulty fuel injector.
  • It can also be caused by a faulty Mass Air Flow (MAF) sensor.
  • Another cause of this fault code is a low fuel pressure condition.
  • A faulty front HO2S can also trigger this code.
  • A leak in the exhaust system can also be a cause of P2191.
  • Lastly, a faulty PCV system can also lead to this fault code.

To fix the p2191 fault code, check the possible causes and inspect related wiring harness and connectors for damage or corrosion.

  • To fix the automobile fault code p2191, first, check the possible causes listed above.
  • Then, visually inspect the related wiring harness and connectors.
  • Look for damaged components and check for broken, bent, pushed out, or corroded connector’s pins.
  • This fix will take an estimated repair time of 1.0 hour.

The fault code P2191 indicates that the fuel mixture is too lean. This can be caused by a faulty oxygen sensor, a vacuum leak, or a fuel delivery issue. The estimated repair time for this fault code is 1.0 hour.

The cost of fixing this issue can vary depending on the auto repair shop, but it is common for most shops to charge between $75 and $150 per hour.

It is important to address this issue promptly as it can lead to decreased fuel efficiency and potential engine damage if left unresolved.

The P2191 code is related to the closed loop airfuel metering system used by the Powertrain Control Module (PCM). The PCM monitors the HO2S signal voltage and adjusts fuel delivery based on it.

The code is set when the fuel trim values reach excessive levels due to a lean condition at higher load bank. This code indicates that the system is too lean, which means that there is not enough fuel in the airfuel mixture. The ideal fuel trim value is around 0%, and the PCM will add fuel when the HO2S signal indicates a lean condition.

What are the possible causes of the P2191 automobile fault code?

The P2191 fault code in automobiles is indicated by the engine light turning on. The possible causes of this fault code include a faulty fuel injector, MAF sensor, low fuel pressure, front HO2S, exhaust system leak, or PCV system. To fix this issue, one must check the possible causes listed above, visually inspect the related wiring harness and connectors, and look for damaged components or corroded connector pins.

How can I fix the P2191 automobile fault code?

If you’re experiencing the P2191 fault code, which is indicated by the engine light or service engine soon warning light, there are several possible causes to consider. These include a faulty fuel injector, MAF sensor, low fuel pressure, front HO2S, exhaust system leak, or PCV system. To fix the issue, visually inspect the wiring harness and connectors for any damage or corrosion, and check for broken or bent pins.

What should I visually inspect when trying to fix the P2191 automobile fault code?

If you’re trying to fix the P2191 automobile fault code, start by visually inspecting the related wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector’s pins. The engine light may be on due to a faulty fuel injector, MAF sensor, low fuel pressure condition, faulty front HO2S, leak in the exhaust system, or faulty PCV system. Check the “Possible Causes” listed above to determine the root cause of the issue.

p2191 error fault code explained

If you see the Engine Light ON or Service Engine Soon Warning Light with the P2191 code, check for a faulty fuel injector, MAF sensor, low fuel pressure, front HO2S, exhaust system leak, or faulty PCV system. Visually inspect the wiring harness and connectors for damage or corrosion.

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