The P1EFA fault code in automobiles indicates a problem with the battery charger system.

The most common symptom is the illumination of the engine light or service engine soon warning light. The cause of this issue could be a faulty battery charger, an open or shorted battery charger harness, or a poor electrical connection in the battery charger circuit. It is important to address this issue promptly as it can lead to further damage to the vehicle’s electrical system.

The repair process involves visually inspecting the wiring harness and connectors, checking for damaged components, and looking for broken, bent, pushed out, or corroded connector pins. The repair time for this issue 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 p1efa fault code. Here are the symptoms to look out for:

  • The P1EFA fault code in automobiles can cause several symptoms, including the engine light turning on or the service engine soon warning light appearing.
  • Other symptoms may include reduced engine power, engine stalling, rough idling, decreased fuel efficiency, and difficulty starting the engine.
  • Additionally, the vehicle may experience a loss of acceleration or have trouble shifting gears.
  • It is important to address these symptoms promptly to prevent further damage to the vehicle.

The P1EFA automobile fault code can be caused by a faulty battery charger, open or shorted harness, or poor electrical connection.

  • The automobile fault code P1EFA can be caused by a faulty battery charger.
  • It can also be caused by an open or shorted battery charger harness.
  • Additionally, poor electrical connection in the battery charger circuit can also trigger this fault code.

To fix the p1efa fault code, check the possible causes and inspect the wiring harness and connectors for any damage or corrosion.

  • To fix the automobile fault code p1efa, 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 automobile fault code P1EFA has an estimated repair time of 1.0 hour. The cost of fixing this fault code is influenced by the repair time. Most auto repair shops charge between $75 and $150 per hour for their services.

Therefore, the fixing cost of P1EFA will range between $75 and $150, depending on the repair time required.

The P1EFA code is related to the hybridEV powertrain control module 2.

It monitors the battery charger high-voltage output and current output. The code indicates that the battery charger high-voltage converter 1 input current is too high.

The battery charger operates in either a constant current mode or a constant voltage mode.

The diagnostic that will be run depends on the mode the battery charger is in. The battery charger runs constant voltage mode at the beginning and end of the charge cycle and runs constant current mode most of the charging cycle.

What are the possible causes of the P1EFA automobile fault code?

If you see the engine light on or the service engine soon warning light, it could be due to the P1EFA fault code. This code is usually caused by a faulty battery charger, an open or shorted battery charger harness, or a poor electrical connection in the battery charger circuit. To fix this issue, you should visually inspect the related wiring harness and connectors, check for damaged components, and look for broken, bent, pushed out, or corroded connector’s pins.

How can I visually inspect the wiring harness and connectors related to the P1EFA fault code?

If you’re experiencing an Engine Light ON or Service Engine Soon Warning Light due to the P1EFA fault code, it could be caused by a faulty Battery Charger, open or shorted Battery Charger harness, or poor electrical connection in the Battery Charger circuit. To fix this issue, you should visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins. Don’t forget to check the “Possible Causes” listed above.

What should I look for when checking for damaged components and connector pins related to the P1EFA fault code?

If you’re experiencing the P1EFA fault code, which is indicated by the engine light or service engine soon warning light turning on, you should check for a faulty battery charger, an open or shorted battery charger harness, or a poor electrical connection in the battery charger circuit. To fix this issue, visually inspect the wiring harness and connectors, and check for damaged components. Look for broken, bent, pushed out, or corroded connector pins.

p1efa error fault code explained

If your engine light is on, it could be due to a faulty battery charger, open or shorted harness, or poor electrical connection.

To fix it, visually inspect the wiring harness and connectors for damage or corrosion.

Check for broken, bent, or pushed out pins.

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