1999 Grand Am 2.4L Engine P1632 Code: Causes and Fixes
My 1999 Grand Am 2.4L 4-cylinder vehicle recently triggered a P1632 diagnostic code after I accidentally drove it into a ditch about a week ago. The car now displays this error, and I'm unsure what caused it or how to resolve it. What does the P1632 code mean for a 1999 Grand Am? Is there a known cause related to vehicle damage or modifications? How can I fix this issue step-by-step?
P1632 Code: Theft Deterrent Fuel Disable Signal Detected The security light may be on, indicating an issue with the passkey system. This code typically points to a problem in the vehicle's anti-theft system. First, check if you have a remote starter — this can interfere with the key recognition process. Next, perform a transponder key relearn procedure on your ignition keys. If that doesn't resolve it, a diagnostic scanner is required to verify communication between the Powertrain Control Module (PCM) and Body Control Module (BCM). Possible causes: vehicle impact (like being driven into a ditch), aftermarket modifications, or faulty key programming. However, putting the car in a ditch may have damaged sensors or wiring — though this is not confirmed. Always consult a professional if the issue persists.