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P1639 Diagnostic Trouble Code Discussion for May 2009

5-Volt Reference 'B' Circuit Malfunction


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Trouble Ticket Help Requests for DTC P1639
Help Request Posted
2003 Pontiac Grand Prix SE 3.1L No Start, Stall, MIL Lamp on VIN: 1G2WK52J73
P1639: 5-Volt Reference 'B' Circuit Malfunction. The customer drove it in and I drove it into the shop. It had these six codes, but was running great. After a day of starting, and monitoring PID's it started acting up on a more regular interval. I have good solid 5 volt Referance when I check at each compone...
May 13, 2009
2003 Pontiac Grand Prix SE 3.1L No Start, Stall, MIL Lamp on VIN: 1G2WK52J73
P1639: 5-Volt Reference 'B' Circuit Malfunction. The customer drove it in and I drove it into the shop. It had these six codes, but was running great. After a day of starting, and monitoring PID's it started acting up on a more regular interval. I have good solid 5 volt Referance when I check at each compone...
May 29, 2009
2003 Pontiac Grand Prix SE 3.1L No Start, Stall, MIL Lamp on VIN: 1G2WK52J73
P1639: 5-Volt Reference 'B' Circuit Malfunction. The customer drove it in and I drove it into the shop. It had these six codes, but was running great. After a day of starting, and monitoring PID's it started acting up on a more regular interval. I have good solid 5 volt Referance when I check at each compone...
May 13, 2009
2003 Pontiac Grand Prix SE 3.1L No Start, Stall, MIL Lamp on VIN: 1G2WK52J73
P1639: 5-Volt Reference 'B' Circuit Malfunction. The customer drove it in and I drove it into the shop. It had these six codes, but was running great. After a day of starting, and monitoring PID's it started acting up on a more regular interval. I have good solid 5 volt Referance when I check at each compone...
May 29, 2009