AutoCodes – Generic – P2062

P2062 Code - Alternator Serial Interface Generator Or Regulator Faulty

Quick Answer

This fault code is stored in a control module when the charging system control does not perform as expected. Common causes include Low battery charge, Faulty Alternator, Alternator harness is open or shorted. 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: P2062 indicates Alternator Serial Interface Generator Or Regulator Faulty.
Common causes: Common causes include Low battery charge, Faulty Alternator, Alternator harness is open or shorted.
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 15,122

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 Feb 15, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P2062 Description

This fault code is stored in a control module when the charging system control does not perform as expected. In order to create a more efficient charging system manufacturers are now using an intelligent charging system. A control module sends a signal to the alternator depending on engine load and operating conditions. This signal is responsible for altering the alternator field current. Manufacturers can use a varying PWM, or pulse width modulation, to command and receive feedback from the alternator. A larger current flow through the field winding will result in a higher charging output voltage. A reduced current flow through the field winding will result in a lower charging output voltage. Some manufacturers now use LIN, or local inter-connection network, communication to control the alternator output voltage. Both LIN bus and PWM control can be tested using an oscilloscope. Some vehicle manufacturers offer a tool that can be used to control the alternator disconnected for the control module which is responsible for controlling it. This allows for accurate diagnosis.

OBDII Code P2062 - Alternator Serial Interface Generator Or Regulator Faulty - AutoCodes.com — P2062 Code - Alternator Serial Interface Generator Or Regulator Faulty

What does this mean?

What are the Possible Causes of the DTC P2062?

Low battery charge
Faulty Alternator
Alternator harness is open or shorted
Alternator circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P2062?

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 P2062 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 P2062 code?

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Information for Specific Makes

P2062 Audi — Reductant/Regeneration Supply Control Circuit/Open
P2062 BMW — Reductant/Regeneration Supply Control Circuit/Open
P2062 Dodge — Reductant/Regeneration Supply Control Circuit/Open
P2062 Mercedes-Benz — Alternator Serial Interface Generator Or Regulator Faulty
P2062 Volkswagen — Reductant/Regeneration Supply Control Circuit/Open

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.