AutoCodes – Chevrolet – B2236 Chevrolet

B2236 Chevrolet Code - Left 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 Left Door lock Switch, Left Door lock Switch harness is open or shorted, Left 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: B2236 Chevrolet indicates Left Door Lock Switch Fault.
Common causes: Common causes include Faulty Left Door lock Switch, Left Door lock Switch harness is open or shorted, Left 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 651

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 B2236 Chevrolet 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 B2236 Chevrolet - Left Door Lock Switch Fault - AutoCodes.com — B2236 Chevrolet Code - Left Door Lock Switch Fault

What does this mean?

What are the Possible Causes of the DTC B2236 Chevrolet?

Faulty Left Door lock Switch
Left Door lock Switch harness is open or shorted
Left Door lock Switch circuit poor electrical connection
Faulty Driver Door Module (DDM)

How to Fix the DTC B2236 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 B2236 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.

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Need more information on how to fix the B2236 Chevrolet code? Get Access to Factory Service Manuals

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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 B2236 Chevrolet Code

What does the OBDII code B2236 mean for a Chevrolet vehicle?

The code B2236 indicates a fault with the left door lock switch, suggesting that the vehicle's onboard diagnostic system has detected an issue with the switch's operation.

What are the common symptoms associated with the B2236 code?

Common symptoms may include the left door lock not functioning properly, the door not locking or unlocking with the switch, or the vehicle's alarm system being triggered unexpectedly.

What could cause the B2236 code to be triggered?

Possible causes include a faulty left door lock switch, damaged wiring or connectors, a malfunctioning body control module (BCM), or issues with the door lock actuator.

How can I diagnose the issue related to the B2236 code?

Start by visually inspecting the left door lock switch and its wiring for any signs of damage. Use a multimeter to test the switch for continuity and check the BCM for any stored codes.

What are some repair tips for fixing the B2236 code?

If the switch is faulty, replacing it is often the simplest solution. Ensure all wiring and connectors are secure and undamaged. If the problem persists, you may need to check the BCM or consult a professional.

Can I drive my Chevrolet vehicle with the B2236 code?

While it is possible to drive the vehicle, the left door lock may not function correctly, which could lead to security issues. It's advisable to address the problem promptly.

Will clearing the B2236 code fix the underlying issue?

Clearing the code may turn off the warning light temporarily, but if the underlying problem is not resolved, the code will likely return.

How much might it cost to repair the B2236 fault?

Repair costs can vary widely depending on the specific issue, ranging from a few dollars for a simple switch replacement to several hundred dollars if the BCM needs to be replaced.

Is the B2236 code specific to Chevrolet vehicles?

While the B2236 code can appear in various makes and models, it is primarily associated with Chevrolet and General Motors vehicles, indicating a left door lock switch issue.

Can I fix a B2236 code myself?

If you have basic automotive knowledge and tools, you may be able to diagnose and replace the left door lock switch yourself. However, if you're unsure, itâ€™s best to seek professional assistance.