AutoCodes – GMC – P0653 2018 GMC Sierra

P0653 2018 GMC Sierra Code - 5 Volt Reference 2 Circuit High Voltage

Quick Answer

The Engine Control Module (ECM) has four (4) internal 5 Volt reference circuits (Some models have two (2) internal 5 Volt reference circuits). Common causes include Faulty Sensor on 5 Volt circuit, Sensor on 5 Volt circuit harness is open or shorted, Sensor on 5 Volt 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: P0653 2018 GMC Sierra indicates 5 Volt Reference 2 Circuit High Voltage.
Common causes: Common causes include Faulty Sensor on 5 Volt circuit, Sensor on 5 Volt circuit harness is open or shorted, Sensor on 5 Volt 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 293

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 Jul 17, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0653 2018 GMC Sierra Description

The Engine Control Module (ECM) has four (4) internal 5 Volt reference circuits (Some models have two (2) internal 5 Volt reference circuits). Each internal reference circuit provides external 5 Volt reference circuits for more than one sensor. A short to ground or short to voltage on one external 5 Volt reference circuit can affect all the components connected to the same internal 5 Volt reference circuit. The Diagnostic Trouble Code (DTC) will be set when the ECM detects a short to voltage or ground on any of the 5 Volt reference circuits for greater than 0.5 s.

OBDII Code P0653 2018 GMC Sierra - 5 Volt Reference 2 Circuit High Voltage - AutoCodes.com — P0653 2018 GMC Sierra Code - 5 Volt Reference 2 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0653 2018 GMC Sierra?

Faulty Sensor on 5 Volt circuit
Sensor on 5 Volt circuit harness is open or shorted
Sensor on 5 Volt circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0653 2018 GMC Sierra?

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 does this mean?

Code Tech Notes

Disconnecting one component at a time from the affected 5 Volt reference circuit while observing the scan tool 5 Volt Reference Circuit Status parameter may help locate the fault. The scan tool parameter will change from Malfunction to OK when the source of the fault is disconnected. If all 5 Volt reference components have been disconnected and a fault is still indicated, the fault may exist in the wiring harness.

The 5 Volt reference 2 circuit provides 5 Volt to the following sensors: (Some models may have different sensors, please consult the factory service manual for the list of sensors for your model and year)

- Brake pedal position sensor
- Crankshaft position sensor

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0653 2018 GMC Sierra 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 P0653 2018 GMC Sierra code?

Need more information on how to fix the P0653 2018 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0653 2018 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 P0653 2018 GMC Sierra Code

1. What does the OBDII code P0653 mean on a 2018 GMC Sierra?

Code P0653 indicates a "5 Volt Reference 2 Circuit High Voltage" issue, meaning the reference voltage sent to certain sensors is higher than normal, potentially affecting performance.

2. What are the common symptoms of code P0653 on a 2018 GMC Sierra?

Symptoms may include a check engine light, reduced engine performance, erratic sensor readings, or issues with systems relying on the 5-volt reference, such as the throttle position sensor.

3. What causes the P0653 code to appear on a 2018 GMC Sierra?

Common causes include a short to voltage in the 5-volt reference circuit, a faulty sensor sharing the circuit, damaged wiring, or a malfunctioning engine control module (ECM).

4. Which sensors are typically affected by the 5 Volt Reference 2 circuit?

Sensors that may use the 5 Volt Reference 2 circuit include the throttle position sensor, MAP sensor, or other engine-related sensors.

5. How do I diagnose the P0653 code on my 2018 GMC Sierra?

Start by inspecting the wiring and connectors for damage or corrosion, test the voltage in the 5-volt reference circuit, and check associated sensors for faults.

6. Can I drive my 2018 GMC Sierra with the P0653 code?

Driving with this code is not recommended, as it can lead to reduced engine performance or further damage to the vehicleâ€™s systems.

7. Is the ECM likely to be the problem with code P0653?

While the ECM could be at fault, it is less common. Wiring issues or faulty sensors are more likely causes and should be checked first.

8. How do I fix the P0653 code on a 2018 GMC Sierra?

Repairs may include fixing or replacing damaged wiring, replacing a faulty sensor, or, in rare cases, replacing the ECM if it is determined to be defective.

9. How much does it cost to repair the P0653 code on a 2018 GMC Sierra?

Repair costs vary; fixing wiring or connectors might cost $100-$300, while sensor replacement ranges from $150-$400. ECM replacement can cost $500 or more.

10. Can a dead battery trigger the P0653 code on a 2018 GMC Sierra?

A dead or weak battery is unlikely to directly cause this code, but voltage irregularities from the battery or alternator might exacerbate electrical issues related to the circuit.