B3951 Pontiac Code - Right Rear Turn Signal Circuit

Code B3951 indicates a problem with the right rear turn signal circuit, such as an open or short, preventing proper operation of the turn signal.

Symptoms may include the right rear turn signal not functioning, a fast-flashing turn signal indicator on the dashboard, or warning lights like the check engine or service vehicle soon light.

Common causes include a burned-out turn signal bulb, damaged wiring or connectors in the circuit, a faulty turn signal socket, or a malfunctioning body control module (BCM).

Begin by inspecting and replacing the right rear turn signal bulb if needed. Check for damaged wiring, loose connections, or corrosion in the socket and repair as necessary. If the issue persists, the BCM may need to be tested or replaced.

You can drive with the code active, but it’s unsafe because the right rear turn signal won’t function properly, which can lead to accidents or traffic violations.

Start by visually inspecting the bulb, socket, and wiring for damage or corrosion. Use a multimeter to test for continuity in the circuit and check for proper voltage at the socket. If no issues are found, scan the BCM for additional faults.

Yes, a blown fuse related to the turn signal circuit can cause this code. Check your vehicle's fuse box and replace any blown fuses.

Not always. While a faulty BCM can trigger this code, it’s more commonly caused by simpler issues like a bad bulb, damaged wiring, or corroded connectors.

Repair costs vary. Replacing a bulb is inexpensive, costing around $10-$20, while repairing wiring or replacing the BCM can cost $100-$500 or more, depending on labor and parts.

You can clear the code using an OBDII scanner, but it will likely return if the underlying issue isn’t resolved.