2000 Toyota Sienna
Key Replacement - Save vs Dealer in San Diego

2000 Toyota Sienna Transponder Key Replacement - Fast, Affordable & Professional

Got a call from a guy over in the Garden Road Area of Poway. He had been dealing with an intermittent no-start for about two weeks and figured it was a fuel or ignition issue. His mechanic had already checked the basics and found nothing wrong.

He described what was happening: the engine would crank normally but not catch. Sometimes it would fire right up, other times nothing. No warning lights, no obvious pattern. His mechanic finally noticed the security light on the dash was staying on longer than it should during the crank attempts.

That pointed straight to the transponder key system. On the 2000 Sienna, the immobilizer reads the chip in the key during start. If the signal is weak or absent, the system cuts fuel and the engine cranks but does not start. It is one of those faults that looks like a dozen other problems until you know what you are looking at.

I came out to the vehicle. His key was original, over two decades old, and the plastic head had a hairline crack running right through the chip zone. The chip was still technically intact but the read was inconsistent depending on exactly how he held the key in the cylinder. Some mornings it read clean. Other times it dropped out mid-crank.

Cut a new key blade to the vehicle, transferred the programming to a new key with the correct transponder chip, tested multiple cold start cycles. Started clean every time.

He had been chasing a ghost problem for two weeks. The fix was a worn key that was right in his hand the whole time. I was done and gone before lunch, and he saved a good chunk compared to what the dealer quoted him just for diagnosis.

BSIS Licensed

LCO#6792

CA Bureau of Security & Investigative Services

NASTF Certified

National Automotive Service Task Force

Fully Insured

Liability & vehicle damage coverage

Google Guaranteed

Verified & backed by Google