AutoCodes – Generic – P1D79

P1D79 Code - Generator Motor I1 Current Sensor Circuit High Voltage

Quick Answer

The motor control module protects the power element with the I1 current sensor (primary side current) within the voltage control unit (VCU). Common causes include Faulty Generator Motor I1 Current Sensor, Generator Motor I1 Current Sensor harness is open or shorted, Generator Motor I1 Current Sensor circuit poor electrical connection. 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 indicates Generator Motor I1 Current Sensor Circuit High Voltage.
Common causes: Common causes include Faulty Generator Motor I1 Current Sensor, Generator Motor I1 Current Sensor harness is open or shorted, Generator Motor I1 Current Sensor circuit poor electrical connection.
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.

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Code Popularity 1,795

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 16, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1D79 Description

The motor control module protects the power element with the I1 current sensor (primary side current) within the voltage control unit (VCU). The motor control module detects a malfunction and stores a DTC when the output voltage of the I1 current sensor is equal to or more than the prescribed value for the prescribed time or more.

OBDII Code P1D79 - Generator Motor I1 Current Sensor Circuit High Voltage - AutoCodes.com — P1D79 Code - Generator Motor I1 Current Sensor Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1D79?

Faulty Generator Motor I1 Current Sensor
Generator Motor I1 Current Sensor harness is open or shorted
Generator Motor I1 Current Sensor circuit poor electrical connection
Faulty Motor Control Module (Generator)

How to Fix the DTC P1D79?

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 P1D79 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.

Need more information about the P1D79 code?

Need more information on how to fix the P1D79 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1D79 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1D79 Acura — Generator Motor I1 Current Sensor Circuit High Voltage
P1D79 Honda — Generator Motor I1 Current Sensor Circuit High Voltage

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 Code

1. What are the common symptoms of OBDII code P1D79 (Generator Motor I1 Current Sensor Circuit High Voltage)?

The common symptoms of this code may include the check engine light being illuminated, poor engine performance, and possibly the vehicle going into a limp mode.

2. What could cause OBDII code P1D79 to appear?

This code is typically triggered by a malfunction in the generator motor I1 current sensor circuit, such as a high voltage reading from the sensor.

3. How serious is OBDII code P1D79?

While this code may not always result in immediate vehicle breakdown, it can affect engine performance and fuel efficiency. It is recommended to address this issue promptly to prevent further damage.

4. Can a DIYer repair OBDII code P1D79 at home?

Repairing this code may require advanced automotive knowledge and specialized tools. It is recommended to consult a professional mechanic to diagnose and fix the issue correctly.

5. What are some possible repair tips for fixing OBDII code P1D79?

Repairing this code may involve checking and repairing the wiring harness, inspecting the current sensor for faults, and ensuring proper connections in the circuit.

6. Is it safe to continue driving with OBDII code P1D79 present?

Continuing to drive with this code present is not recommended, as it can lead to further damage to the vehicle's components. It is best to address the issue as soon as possible.

7. How can I diagnose OBDII code P1D79?

Diagnosing this code typically involves using a diagnostic scanner to retrieve the code, checking the generator motor I1 current sensor circuit for faults, and testing the sensor itself for proper operation.

8. Can a faulty battery cause OBDII code P1D79 to appear?

While a faulty battery can potentially cause electrical issues in a vehicle, OBDII code P1D79 is more commonly related to a malfunction in the generator motor I1 current sensor circuit specifically.

9. Are there any recalls related to OBDII code P1D79?

Recalls related to this specific code may vary depending on the vehicle make and model. It is advisable to check with the manufacturer or a trusted dealership for any relevant recall information.

10. How much does it typically cost to repair OBDII code P1D79?

The cost of repairing this code can vary depending on the extent of the issue, parts needed for replacement, and labor costs. It is recommended to obtain quotes from different mechanics or service centers for an accurate estimate.