Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Circuit Description
DTC B3033 is set when BCM receives incorrect data from Passlockâ„¢ sensor. DTC will set with ignition switch in ON position if Passlockâ„¢ data voltage is incorrect and 3 consecutive data reads within one second have occurred. Once DTC is set, vehicle will start and stall. SECURITY indicator light will flash for 10 minutes. DTC will clear if BCM goes to sleep and reinitializes with fault cleared, all BCM history DTCs are cleared after 100 ignition cycles with no current DTCs active or by using scan tool.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
No obligation. See pricing before you book.