AutoCodes – Chevrolet – B2502 Chevrolet

B2502 Chevrolet Code - Park Relay Shorted To Ground

Quick Answer

When transaxle is in Park, Platform Zone Module (PZM) controls park relay output low to enable Brake Transaxle Shift Interlock (BTSI). Common causes include Faulty Park Relay, Park Relay harness is open or shorted, Park Relay 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: B2502 Chevrolet indicates Park Relay Shorted To Ground.
Common causes: Common causes include Faulty Park Relay, Park Relay harness is open or shorted, Park Relay 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 2,079

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Dec 16, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2502 Chevrolet Description

When transaxle is in Park, Platform Zone Module (PZM) controls park relay output low to enable Brake Transaxle Shift Interlock (BTSI). PZM will continuously monitor this voltage at PZM. The Diagnostic Trouble Code (DTC) B2502 will set when park relay output is not active, and PZM determines output is low for 2 consecutive monitoring cycles. DTC B2502 will clear when park relay output is not active, and PZM determines output is high for one monitoring cycle.

OBDII Code B2502 Chevrolet - Park Relay Shorted To Ground - AutoCodes.com — B2502 Chevrolet Code - Park Relay Shorted To Ground

What does this mean?

What are the Possible Causes of the DTC B2502 Chevrolet?

Faulty Park Relay
Park Relay harness is open or shorted
Park Relay circuit poor electrical connection
Faulty Platform Zone Module (PZM)

How to Fix the DTC B2502 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 B2502 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.

Need more information about the B2502 Chevrolet code?

Need more information on how to fix the B2502 Chevrolet code? Get Access to Factory Service Manuals

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Get the B2502 Chevrolet 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 B2502 Chevrolet Code

1. What does the OBDII code B2502 mean for a Chevrolet?

Code B2502 indicates that the park relay circuit in your vehicle has a short to ground, which can affect the vehicle's lighting or electrical systems.

2. What are the common symptoms of B2502 in a Chevrolet?

Symptoms may include malfunctioning parking lights, intermittent electrical issues, or a blown fuse related to the park relay circuit.

3. What causes the B2502 code in a Chevrolet?

The most common causes are damaged wiring, a faulty park relay, a short to ground in the circuit, or corroded electrical connectors.

4. Can I drive my Chevrolet with a B2502 code?

While the car may still be drivable, it is not recommended as the issue can result in malfunctioning lights or electrical problems that may compromise safety.

5. How is the B2502 code diagnosed in a Chevrolet?

A technician will inspect the park relay, wiring, and connectors for damage or shorts, and use a multimeter to check for continuity and ground faults in the circuit.

6. What repairs are typically needed to fix the B2502 code?

Repairs may include replacing the park relay, repairing or replacing damaged wiring, and cleaning or replacing corroded connectors.

7. How much does it cost to fix a B2502 code in a Chevrolet?

The repair cost varies depending on the root cause but typically ranges from $100 to $300 for parts and labor.

8. Can a bad park relay cause the B2502 code?

Yes, a faulty park relay can cause the circuit to short to ground, triggering the B2502 code.

9. How can I prevent the B2502 code from recurring?

Regularly inspect and maintain your vehicleâ€™s wiring and connectors, and address any corrosion or damage promptly to avoid shorts.

10. Is the B2502 code related to other electrical issues in my Chevrolet?

Yes, a short to ground in the park relay circuit could potentially interfere with other electrical systems, so itâ€™s important to address it quickly.