AutoCodes – Buick – B2253 Buick

B2253 Buick Code - Right Key Cylinder Switch Fault

Quick Answer

The driver or passenger door key switch signal circuits provide input to the Driver Door Module (DDM) or Passenger Door Module (PDM) when the driver or passenger door lock cylinder is rotated to the UNLOCK position. Common causes include Faulty Right Key Cylinder Switch, Right Key Cylinder Switch harness is open or shorted, Right Key Cylinder Switch 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: B2253 Buick indicates Right Key Cylinder Switch Fault.
Common causes: Common causes include Faulty Right Key Cylinder Switch, Right Key Cylinder Switch harness is open or shorted, Right Key Cylinder Switch 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 588

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 Oct 11, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2253 Buick Description

The driver or passenger door key switch signal circuits provide input to the Driver Door Module (DDM) or Passenger Door Module (PDM) when the driver or passenger door lock cylinder is rotated to the UNLOCK position. This input allows the door module to detect a door UNLOCK request. The door module provides power and ground to the door key switch. When the door lock cylinder is rotated to the UNLOCK position, a ground is supplied through the door key switch to the signal circuit, which is pulled low. When the DDM detects low voltage on the driver door key switch signal circuit, it sends a message on the serial data line to the PDM to UNLOCK the passenger door. When the PDM detects low voltage on the passenger door key switch signal circuit, it sends a message on the serial data line to the DDM to UNLOCK the driver door. The messages sent on the serial data line are also used by other systems to execute certain functions. The DDM and PDM monitor the signal circuits to determine how long the ground has been applied. If the DDM or PDM detects that the ground is applied for greater than 20 seconds, a Diagnostic Trouble Code (DTC) is set.

OBDII Code B2253 Buick - Right Key Cylinder Switch Fault - AutoCodes.com — B2253 Buick Code - Right Key Cylinder Switch Fault

What does this mean?

What are the Possible Causes of the DTC B2253 Buick?

Faulty Right Key Cylinder Switch
Right Key Cylinder Switch harness is open or shorted
Right Key Cylinder Switch circuit poor electrical connection
Faulty Passenger Door Module (PDM)

How to Fix the DTC B2253 Buick?

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 B2253 Buick 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 B2253 Buick Code

1. What does the OBDII code B2253 mean in a Buick?

The code B2253 indicates a "Right Key Cylinder Switch Fault," meaning the vehicle's system has detected an issue with the right-side key cylinder switch.

2. What are the common symptoms of a B2253 code in a Buick?

Symptoms may include difficulty turning the key in the right-side cylinder, failure to recognize the key, or problems with locking/unlocking functions.

3. What causes the B2253 code to appear in a Buick?

Common causes include a faulty right key cylinder switch, damaged wiring or connectors, or issues with the vehicle's security or ignition system.

4. Can a B2253 code prevent the car from starting?

Yes, if the right key cylinder switch is part of the ignition system, this fault could prevent the vehicle from starting.

5. How is the B2253 code diagnosed in a Buick?

A technician will use a diagnostic scanner to confirm the code, inspect the right key cylinder switch, and check for wiring or connector damage.

6. Can I fix a B2253 code on my Buick myself?

If you're experienced with automotive repairs, you can inspect the switch and wiring, but professional diagnosis is recommended to avoid further issues.

7. How can I reset the B2253 code on my Buick?

After repairing the issue, you can reset the code using an OBDII scanner, but it may return if the underlying problem isn't fixed.

8. How much does it cost to repair a B2253 code on a Buick?

Repair costs vary but may range from $100 to $400, depending on whether the key cylinder switch or wiring needs replacement.

9. Is it safe to drive with a B2253 code on my Buick?

Driving may be possible, but issues with the key cylinder switch could worsen, potentially leading to lock or ignition failures.

10. What should I check first when troubleshooting a B2253 code in a Buick?

Start by inspecting the right key cylinder switch for visible damage, and ensure all related wiring and connectors are secure and intact.

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