Join Now
International Automotive Technicians Network

P1635 Diagnostic Trouble Code Discussion for April 2006

5-Volt Reference 'A' Circuit Malfunction


Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC P1635
Help Request Posted
2001 Chevrolet Malibu 3.1L MIL Lamp on VIN: 1G1ND52J11
P1635: 5-Volt Reference 1 Circuit Malfunction. ... Customer brought car in for check engine light and a intermittent high idle. Had a dtc p1635, 5 volt ref. circuit and p1189, engine oil pressure switch. Started by checking p1635 first. Checked 5 volt circuit for tps, map, egr position, and fuel tank press...
April 24, 2006
2001 Chevrolet Malibu 3.1L MIL Lamp on VIN: 1G1ND52J11
P1635: 5-Volt Reference 1 Circuit Malfunction. ... Customer brought car in for check engine light and a intermittent high idle. Had a dtc p1635, 5 volt ref. circuit and p1189, engine oil pressure switch. Started by checking p1635 first. Checked 5 volt circuit for tps, map, egr position, and fuel tank press...
April 26, 2006
2001 Chevrolet Malibu 3.1L MIL Lamp on VIN: 1G1ND52J11
P1635: 5-Volt Reference 1 Circuit Malfunction. ... Customer brought car in for check engine light and a intermittent high idle. Had a dtc p1635, 5 volt ref. circuit and p1189, engine oil pressure switch. Started by checking p1635 first. Checked 5 volt circuit for tps, map, egr position, and fuel tank press...
April 24, 2006
2001 Chevrolet Malibu 3.1L MIL Lamp on VIN: 1G1ND52J11
P1635: 5-Volt Reference 1 Circuit Malfunction. ... Customer brought car in for check engine light and a intermittent high idle. Had a dtc p1635, 5 volt ref. circuit and p1189, engine oil pressure switch. Started by checking p1635 first. Checked 5 volt circuit for tps, map, egr position, and fuel tank press...
April 26, 2006