B2623 Chevrolet Code - Display Dimming Pulse Width Modulation Input Circuit
Quick Answer
The Body Control Module (BCM) receives a variable voltage signal from the Instrument Panel (I/P) Dimmer Switch requesting to illuminate the I/P controls illumination lamps to a desired intensity. Common causes include Faulty Instrument Panel (I/P) Dimmer Switch, Instrument Panel (I/P) Dimmer Switch harness is open or shorted, Instrument Panel (I/P) Dimmer 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
- B2623 Chevrolet indicates Display Dimming Pulse Width Modulation Input Circuit.
- Common causes
- Common causes include Faulty Instrument Panel (I/P) Dimmer Switch, Instrument Panel (I/P) Dimmer Switch harness is open or shorted, Instrument Panel (I/P) Dimmer 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.
Code B2623 Chevrolet Description
What are the Possible Causes of the DTC B2623 Chevrolet?
- Faulty Instrument Panel (I/P) Dimmer Switch
- Instrument Panel (I/P) Dimmer Switch harness is open or shorted
- Instrument Panel (I/P) Dimmer Switch circuit poor electrical connection
- Faulty Body Control Module (BCM)
How to Fix the DTC B2623 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 B2623 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 B2623 Chevrolet code?
Need more information on how to fix the B2623 Chevrolet code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B2623 Chevrolet code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about B2623 Chevrolet Code
1. What does the OBDII code B2623 mean on a Chevrolet?
B2623 indicates an issue with the Display Dimming Pulse Width Modulation (PWM) Input Circuit, typically related to the vehicle’s interior lighting or dashboard dimming functionality.
2. What are the common symptoms of code B2623 in a Chevrolet?
Symptoms include non-functional or inconsistent dashboard dimming, flickering interior lights, or the inability to adjust the brightness of the instrument panel.
3. What causes the B2623 code to appear?
The code is usually caused by a faulty dimmer switch, damaged wiring, a failed body control module (BCM), or a poor connection in the PWM circuit.
4. How do I diagnose the B2623 code on my Chevrolet?
Start by inspecting the dimmer switch, wiring, and connectors for damage or corrosion. Use a multimeter to test the continuity of the PWM circuit, and scan the BCM for additional trouble codes.
5. Can a bad dimmer switch trigger the B2623 code?
Yes, a defective or malfunctioning dimmer switch is a common cause of the B2623 code in Chevrolet vehicles.
6. Is it safe to drive with the B2623 code active?
Yes, it is generally safe to drive, but the inability to adjust interior lighting could be distracting or inconvenient, especially at night.
7. How do I fix the B2623 code on a Chevrolet?
Repairs typically involve replacing a faulty dimmer switch, repairing damaged wiring, cleaning corroded connectors, or, in rare cases, reprogramming or replacing the BCM.
8. Can a dead battery cause the B2623 code to appear?
While unlikely, a weak or dead battery may cause voltage fluctuations that could impact the PWM circuit and trigger the code.
9. How much does it cost to fix the B2623 code on a Chevrolet?
The cost depends on the root cause. A dimmer switch replacement may cost $50-$200, while BCM repairs or replacement could range from $300-$800, including labor.
10. Do I need to clear the code after repairs for B2623?
Yes, after completing repairs, use an OBDII scanner to clear the code and ensure it does not return during subsequent testing.
Discuss the causes and fixes for B2623 Chevrolet OBDII Code
Code B2623 Chevrolet comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
