× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network

P1540 Diagnostic Trouble Code Discussion for March 2006

Air Conditioning Refrigerant Over-Pressure - Air Conditioning Disabled

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 P1540
Help Request Posted
1997 Subaru Legacy GT 2.5L Poor Idle Quality, Cuts out, Stall, MIL Lamp on VIN: 4S3BD675XV
P1540: Vehicle Speed Sensor Signal Circuit Malfunction. ... here with an intermittent problem. Every 2 to 4 days, this Subaru will turn on the MIL, start stalling, and running erratically, then clear up. I have never experienced this problem, but it has happened to my customer 10 times so far. Each time he will swi...
March 07, 2006