AutoCodes – Cadillac – B2237 Cadillac

B2237 Cadillac Code - Right Door Lock Switch Fault

Quick Answer

The driver or passenger door switch signal circuits provide inputs to the Driver Door Module (DDM) or Passenger Door Module (PDM) when a door lock switch is activated to the LOCK or UNLOCK position. Common causes include Faulty Right Door Lock Switch, Right Door Lock Switch harness is open or shorted, Right Door Lock 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: B2237 Cadillac indicates Right Door Lock Switch Fault.
Common causes: Common causes include Faulty Right Door Lock Switch, Right Door Lock Switch harness is open or shorted, Right Door Lock 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 533

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 10, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2237 Cadillac Description

The driver or passenger door switch signal circuits provide inputs to the Driver Door Module (DDM) or Passenger Door Module (PDM) when a door lock switch is activated to the LOCK or UNLOCK position. These inputs allow the door module to detect a door LOCK or UNLOCK request. The door modules provide power and ground to the door lock switches. When a door lock switch is activated to the LOCK or UNLOCK position, ground is supplied through the door lock switch to the signal circuit, which is pulled low. When the door module detects low voltage on the signal circuit, it will command the door latches to LOCK or UNLOCK. If the driver door switch is activated, the DDM will LOCK or UNLOCK the driver door latch and also send a message on the serial data line to the PDM to LOCK or UNLOCK the passenger door latch. If the passenger door switch is activated, the PDM will LOCK or UNLOCK the passenger door latch and also send a message on the serial data line to the DDM to LOCK or UNLOCK the driver door latch. The door modules monitor the signal circuits to determine how long the ground has been applied. If the door module detects that a ground is applied for greater than 20 seconds, a Diagnostic Trouble Code (DTC) is set.

OBDII Code B2237 Cadillac - Right Door Lock Switch Fault - AutoCodes.com — B2237 Cadillac Code - Right Door Lock Switch Fault

What does this mean?

What are the Possible Causes of the DTC B2237 Cadillac?

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

How to Fix the DTC B2237 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 B2237 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 B2237 Cadillac Code

1. What are common symptoms of OBDII code B2237 in a Cadillac related to the right door lock switch fault?

- Common symptoms include malfunctioning or inoperative right door lock switch, failure to lock or unlock the door, and illuminated warning lights on the dashboard.

2. What are the possible causes of OBDII code B2237 indicating a right door lock switch fault in a Cadillac?

- The code B2237 can be triggered by a faulty right door lock switch, damaged wiring or connectors, or issues with the door lock actuator.

3. How can I diagnose the right door lock switch fault causing OBDII code B2237 in my Cadillac?

- To diagnose the issue, you can start by visually inspecting the door lock switch, checking the wiring and connectors for any damage, and testing the door lock actuator for proper function.

4. Can I repair the right door lock switch fault associated with OBDII code B2237 in my Cadillac myself?

- Depending on your skills and experience, you may be able to repair the issue yourself by replacing the faulty door lock switch, repairing damaged wiring, or addressing any connector issues.

5. Is it safe to continue driving my Cadillac with OBDII code B2237 related to a right door lock switch fault?

- While the vehicle may still be operable, it is recommended to address the issue promptly to ensure proper functioning of the right door lock system for security and convenience.

6. How much does it typically cost to repair the right door lock switch fault causing OBDII code B2237 in a Cadillac?

- The cost of repair can vary depending on the specific cause of the fault, but it may involve expenses for parts, labor, and diagnostic fees.

7. Are there any temporary solutions to consider for the right door lock switch fault and OBDII code B2237 in my Cadillac?

- You can try temporarily disconnecting the right door lock switch to prevent further electrical issues, but it's important to address the root cause of the fault for a permanent solution.

8. Will resetting the OBDII system clear the B2237 fault code related to the right door lock switch in my Cadillac?

- Resetting the OBDII system may temporarily clear the fault code, but it is likely to reappear if the underlying issue with the right door lock switch is not resolved.

9. Can extreme weather conditions affect the right door lock switch fault leading to OBDII code B2237 in a Cadillac?

- Extreme temperatures or moisture exposure can potentially exacerbate existing issues with the door lock switch, wiring, or connectors, leading to the triggering of the B2237 fault code.

10. Is it recommended to seek professional help for diagnosing and repairing the right door lock switch fault associated with OBDII code B2237 in a Cadillac?

- If you are unsure about diagnosing or repairing the issue yourself, it is advisable to consult a certified mechanic or dealership for expert assistance in resolving the fault effectively.