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P1D79 Honda Code - Generator Motor I1 Current Sensor Circuit High Voltage

Quick Answer

The P1D79 diagnostic trouble code for Honda vehicles specifically refers to an issue with the Generator Motor I1 Current Sensor Circuit registering high voltage. Common causes include Faulty generator motor or alternator, Damaged wiring or connectors in the current sensor circuit, Malfunctioning current sensor. 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
P1D79 Honda indicates Generator Motor I1 Current Sensor Circuit High Voltage.
Common causes
Common causes include Faulty generator motor or alternator, Damaged wiring or connectors in the current sensor circuit, Malfunctioning current sensor.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 30, 2024
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Code P1D79 Honda Description

The P1D79 diagnostic trouble code for Honda vehicles specifically refers to an issue with the Generator Motor I1 Current Sensor Circuit registering high voltage. In simpler terms, this code indicates that there is a problem with the electrical circuit that monitors the current flowing through the generator motor in the vehicle. The generator motor, also known as the alternator, is responsible for generating electrical power to charge the battery and power the electrical components of the vehicle when the engine is running.

OBDII Code P1D79 Honda - Generator Motor I1 Current Sensor Circuit High Voltage
P1D79 Honda Code - Generator Motor I1 Current Sensor Circuit High Voltage

Common Causes of P1D79 Honda

  1. Faulty generator motor or alternator.
  2. Damaged wiring or connectors in the current sensor circuit.
  3. Malfunctioning current sensor.
  4. Issues with the powertrain control module (PCM).
  5. Corrosion or poor connections in the electrical system.

Symptoms of P1D79 Honda

  1. Dim or flickering lights on the dashboard or exterior of the vehicle.
  2. Battery warning light illuminated on the dashboard.
  3. Difficulty starting the vehicle, especially in cold weather.
  4. Electrical components not functioning properly, such as power windows or radio.
  5. Engine stalling or running rough due to insufficient electrical power.

How to Fix P1D79 Honda

  1. Begin by conducting a thorough inspection of the generator motor, current sensor circuit, and related wiring for any visible damage or corrosion.
  2. Test the current sensor using a multimeter to check for proper voltage readings.
  3. If the current sensor is faulty, replace it with a new one following manufacturer guidelines.
  4. Check and repair any damaged wiring or connectors in the circuit.
  5. Clear the diagnostic trouble codes from the vehicle's PCM using a scan tool and perform a test drive to ensure the issue has been resolved.

Cost to Fix P1D79 Honda

The typical repair costs for addressing a P1D79 code in a Honda vehicle can range from $200 to $500, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that diagnosis time and labor rates at auto repair shops can vary significantly based on factors such as location, vehicle make and model, and engine type. Therefore, it's recommended to check with local shops for a more accurate estimate before proceeding with the repair.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1D79 Honda Code

1. What are common symptoms of OBDII code P1D79 in a Honda related to the Generator Motor I1 Current Sensor Circuit High Voltage?

- Common symptoms include the check engine light being illuminated, decreased fuel efficiency, and potential issues with the hybrid system.

2. What are possible causes of OBDII code P1D79 in a Honda?

- Possible causes may include a faulty generator motor I1 current sensor, damaged wiring or connectors in the sensor circuit, or issues with the hybrid battery.

3. How can I diagnose the Generator Motor I1 Current Sensor Circuit High Voltage issue in my Honda?

- Diagnosing this issue typically involves using a scan tool to read the OBDII code, checking the sensor and its connections for any visible damage, and performing electrical tests to pinpoint the problem.

4. Can I drive my Honda with the P1D79 code present?

- It is not recommended to drive your vehicle with this code present, as it can lead to further damage to the hybrid system and potentially impact the vehicle's performance.

5. What are the repair options for OBDII code P1D79 in a Honda?

- Repair options may include replacing the faulty generator motor I1 current sensor, repairing damaged wiring or connectors, or addressing any issues with the hybrid battery as needed.

6. Is it possible to reset the OBDII code P1D79 in a Honda without fixing the underlying issue?

- While it is possible to clear the code temporarily, it will likely reappear until the root cause of the Generator Motor I1 Current Sensor Circuit High Voltage problem is addressed.

7. How much does it typically cost to repair OBDII code P1D79 in a Honda?

- The cost of repair can vary depending on the specific issue causing the code, but it may involve parts and labor expenses ranging from a few hundred to over a thousand dollars.

8. Can a DIY enthusiast fix the Generator Motor I1 Current Sensor Circuit High Voltage issue in a Honda?

- Depending on your skill level and access to the necessary tools, a DIY enthusiast may be able to address this issue by following repair guides and instructions specific to their Honda model.

9. Will ignoring OBDII code P1D79 in a Honda cause further damage?

- Ignoring this code can potentially lead to more severe issues with the hybrid system, decreased fuel efficiency, and possibly even engine performance problems over time.

10. How often does the Generator Motor I1 Current Sensor Circuit High Voltage issue occur in Honda vehicles?

- While not extremely common, this issue can occur in Honda vehicles equipped with hybrid systems, particularly in older models or those with higher mileage.

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