B0051: Rear Body Left Turn Signal Circuit Malfunction
Can you still drive? Yes, but repair the turn signal quickly. Driving without a functioning turn signal is unsafe and can result in a traffic citation.
What Does B0051 Mean?
Code B0051 indicates a fault in the left rear turn signal circuit as detected by the body control module. The BCM monitors the circuit current and has detected an abnormality such as an open circuit, short, or excessive resistance. This is the left-side counterpart to B0050.
Need to read your codes?
An OBD-II scanner lets you read and clear diagnostic trouble codes from your vehicle's computer. Most scanners work with any car made after 1996.
Browse OBD-II Scanners on AmazonCommon Causes
- Burned-out left rear turn signal bulb
- Corroded bulb socket on left side
- Wiring damage to left tail light assembly
- Poor ground at left tail light
- Body control module fault
Symptoms
- Left rear turn signal not working
- Fast blink rate on left turn indicator
- Turn signal warning on dash
- Left side marker light may also fail
Diagnostic Steps
- 1Check the left rear turn signal bulb and replace if needed
- 2Inspect the left bulb socket for corrosion or damage
- 3Test voltage and ground at the left tail light connector
- 4Trace wiring from BCM to left tail light for breaks or chafing
- 5Verify ground integrity at the left tail light mounting point
Recommended Parts & Tools
turn signal bulbs
bulb socket repair harness
electrical contact cleaner
tail light assembly
Estimated Repair Cost
| Type | Estimated Cost |
|---|---|
| Total Repair Cost Range | $5 - $300 |
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Chat with AI About B0051Commonly Affected Vehicles
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Frequently Asked Questions
Can I just replace the bulb to fix B0051?
In most cases, yes. A burned-out bulb is the most common cause. If the code returns after bulb replacement, check the socket and wiring.
Is B0051 related to B0050?
They are the same type of fault on opposite sides. B0050 is the right rear turn signal and B0051 is the left rear turn signal.
Community Fix Reports
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