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P1635 Diagnostic Trouble Code Discussion for June 2011

5-Volt Reference 'A' Circuit Malfunction

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Trouble Ticket Help Requests for DTC P1635
Help Request Posted
2002 Chevrolet Venture LS 3.4L 5v map and tps VIN: 1GNDX03E82
P1635: 5-Volt Reference 'A' Circuit Malfunction. Last time in we replaced tps and map with known good parts to test-no help. Opened up the pcm to inspect for corrosion-none found. Suspected cheap plug wires so i shielded the area they pass by the engine harness-no help. Unplugged the alternator-no help. Then...
June 06, 2011
2003 Oldsmobile Silhouette GL 3.4L Poor Idle Quality, Cuts out, Stall, MIL Lamp on VIN: 1GHDX03E53
P1635: 5-Volt Reference 'A' Circuit Malfunction. Customer reports that the vehicle drives fine most of the time but when he goes through Elwood Indiana at about 11 to 12 o'clock noon it starts stalling and he has to put the accelerator down to keep it going. It acts like it is going to die out completely. Th...
June 14, 2011
2003 Chevrolet Malibu 3.1L Surge, MIL Lamp on
P1635: 5-Volt Reference 1 Circuit Malfunction. ... got a code p1635. The code is 5-volt reference 1 circuit voltage is out of tolerance. The flow chart say's The powertrain module provides 5-volts to the flowing sensors: map,egr,ftp,tps. The conditions for setting the DTC is: The pcm detects a voltage out ...
June 23, 2011