AutoCodes – Chevrolet – P1650 Chevrolet

P1650 Chevrolet Code - PCM Output Controls Fault

Quick Answer

The Quad Driver Module (QDM) is an electronic switch that completes a ground circuit when switched on. Common causes include Faulty Powertrain Control Module (PCM), Powertrain Control Module harness is open or shorted, Powertrain Control Module 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: P1650 Chevrolet indicates PCM Output Controls Fault.
Common causes: Common causes include Faulty Powertrain Control Module (PCM), Powertrain Control Module harness is open or shorted, Powertrain Control Module 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 12,242

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 Jan 12, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1650 Chevrolet Description

The Quad Driver Module (QDM) is an electronic switch that completes a ground circuit when switched on. The QDM independently controls 4 separate outputs. A load is connected between battery voltage and the QDM allowing QDM driver to control the output. Each QDM has a fault detection logic that compares its input and output voltages. The logic expects to measure less than 3 volts when the QDM is on and greater than 7 volts when off. The QDM has only one fault that will detect a fault on any of the 4 outputs. The scan tool can be used to cycle the outputs on and off. It can also perform automated test which can isolate the faulty circuit.
The Diagnostic Trouble Code (DTC) P1650 and P1651 will set if there is an open, short to ground or short to voltage on any of the QDM output circuits, faulty MIL circuit, faulty upshift light circuit, faulty cooling fan relay circuit or A/C relay circuit. Fault detected for 5 seconds will set P1651. Fault detected for 20 seconds will set P1650. The QDM circuit is continuously checked when the engine is running.
The Quad Driver Module (QDM) is part of the Powertrain Control Module (PCM).

OBDII Code P1650 Chevrolet - PCM Output Controls Fault - AutoCodes.com — P1650 Chevrolet Code - PCM Output Controls Fault

What does this mean?

What are the Possible Causes of the DTC P1650 Chevrolet?

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

How to Fix the DTC P1650 Chevrolet?

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 P1650 Chevrolet 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.

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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 P1650 Chevrolet Code

1. What does the OBDII code P1650 mean on a Chevrolet?

P1650 on a Chevrolet indicates a "PCM Output Controls Fault," meaning the Powertrain Control Module (PCM) has detected an issue with one or more output control circuits.

2. What are the common symptoms of the P1650 code in a Chevrolet?

Common symptoms include the Check Engine Light turning on, reduced engine performance, erratic idle, or failure of certain electrical components like relays or solenoids.

3. What causes the P1650 code to appear in a Chevrolet?

The P1650 code can be caused by damaged wiring, a faulty PCM, a malfunctioning sensor or relay, or poor electrical connections in the output control circuits.

4. Can I drive my Chevrolet with the P1650 code active?

Driving with the P1650 code is not recommended, as it can lead to further damage or unpredictable vehicle performance due to malfunctioning output controls.

5. How do I diagnose the P1650 code on a Chevrolet?

Start by inspecting the wiring and connectors for damage or corrosion. Use a multimeter to test circuit continuity and verify the integrity of related relays and sensors. If no issues are found, test the PCM itself.

6. What are the most common fixes for the P1650 code in a Chevrolet?

Common fixes include repairing or replacing damaged wiring, cleaning corroded connectors, replacing malfunctioning relays or sensors, or replacing the PCM if it is determined to be faulty.

7. How much does it cost to repair the P1650 code on a Chevrolet?

Repair costs vary depending on the issue. Wiring or connector repairs may cost $50-$150, while PCM replacement can range from $500 to $1,200.

8. Can a faulty PCM alone cause the P1650 code on a Chevrolet?

Yes, a faulty PCM can cause the P1650 code, although it is less common. Always rule out wiring and sensor issues before replacing the PCM.

9. Will clearing the P1650 code fix the problem in my Chevrolet?

Clearing the code will turn off the Check Engine Light temporarily, but the underlying issue must be resolved to prevent the code from returning.

10. Are there any preventive measures to avoid the P1650 code on a Chevrolet?

Regular maintenance, including inspecting wiring and connectors for wear or corrosion and addressing electrical issues promptly, can help prevent the P1650 code.