AutoCodes – Cadillac – B2253 Cadillac

B2253 Cadillac 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 Cadillac 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 584

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

What does this mean?

What are the Possible Causes of the DTC B2253 Cadillac?

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 Cadillac?

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 Cadillac 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 Cadillac Code

1. What are the common symptoms of OBDII code B2253 in a Cadillac related to the Right Key Cylinder Switch Fault?

- Common symptoms include difficulty starting the vehicle, the ignition key not turning smoothly, and the engine occasionally stalling.

2. What is the most common cause of the B2253 code in a Cadillac?

- The most common cause of the B2253 code is a malfunction in the right key cylinder switch, which is part of the vehicle's anti-theft system.

3. How can I diagnose the Right Key Cylinder Switch Fault causing the B2253 code in my Cadillac?

- Diagnosing the issue involves inspecting the key cylinder for any physical damage, checking for loose connections, and using a scan tool to read the specific codes stored in the vehicle's computer.

4. Can I still drive my Cadillac with the B2253 code present?

- It is not recommended to drive the vehicle with the B2253 code present, as it can lead to potential issues with starting the vehicle and the security system.

5. What are some repair tips for fixing the Right Key Cylinder Switch Fault triggering the B2253 code in my Cadillac?

- Repair tips include replacing the right key cylinder switch, ensuring proper connection of electrical components, and reprogramming the keys if needed.

6. How much does it typically cost to repair the B2253 code related to the Right Key Cylinder Switch Fault in a Cadillac?

- The cost of repairing the B2253 code can vary depending on the extent of the issue, but it may range from $200 to $500, including parts and labor.

7. Will resetting the OBDII codes make the B2253 code related to the Right Key Cylinder Switch Fault disappear?

- Resetting the codes may temporarily clear the B2253 code, but it is important to address the underlying issue causing the fault to prevent it from reoccurring.

8. Can a DIY enthusiast fix the B2253 code associated with the Right Key Cylinder Switch Fault in a Cadillac?

- While some basic troubleshooting steps can be taken by a DIY enthusiast, diagnosing and repairing the B2253 code may require specialized tools and expertise, so professional assistance is recommended.

9. How long does it take to repair the Right Key Cylinder Switch Fault causing the B2253 code in a Cadillac?

- The repair time for the B2253 code can vary depending on the exact cause of the issue, but it may take a few hours to a full day for a mechanic to diagnose and fix the problem.

10. Is the B2253 code related to the Right Key Cylinder Switch Fault a common issue in Cadillacs?

- The B2253 code related to the Right Key Cylinder Switch Fault is a relatively common issue in Cadillacs, particularly in older models or vehicles with high mileage.