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P1819 Diagnostic Trouble Code Discussion for February 2013

Internal Mode Switch - No Start/Wrong Range

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Trouble Ticket Help Requests for DTC P1819
Help Request Posted
2004 Buick Rendezvous CX 3.4L No Start VIN: 3G5DB03E24
P1819: Internal Mode Switch - No Start. ... no start. Fuel pump runs with the psi at 57 on the Schrader valve. Check for spark and it had it. Scanned the bcm data to make sure it wasn’t an anti-theft issue. We are good there. I checked the pcm for codes and it has a p0420 cat eff code and a p1819 co...
February 14, 2013