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P1639 Diagnostic Trouble Code Discussion for December 2008

5-Volt Reference 'B' Circuit Malfunction

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Trouble Ticket Help Requests for DTC P1639
Help Request Posted
2002 Volkswagen Jetta GLS 1.8L fast idle VIN: 3VW8E69M92
P1639: 18047 Accelerator position sensor 1/2 implausible. ... idles at redline. The e-throttle is partially open whenever the key is on unless the brake pedal is applied. The car has a code P1639/18047 accelerator position sensor 1/2 implausible signal. We installed a new pedal position sensor and there was no change...
December 31, 2008