JC Landry, Author at eManualOnline Blog

JC Landry

JC is the Senior Editor at eManualOnline.com, GarageSpot.com, and Drive-My.com, as well as the Webmaster of TheMechanicDoctor.com, only to name a few. He's been a certified Master Mechanic for 15 years, working for various car dealers and specialized repair shops before turning towards blogging about cars and EVs in the hope of helping the next generation of automotive technicians. He also loves cats, Johnny Cash and Subarus.

P251D OBD2: PTO Engine Shutdown Circuit/Open

JC Landry June 1, 2025

Learn all about the P251D code, what causes PTO engine shutdown circuit/open issues, and how to diagnose and fix common problems to maintain optimal vehicle performance.

P251E OBD2: PTO Engine Shutdown Circuit Low

JC Landry May 30, 2025

Learn all about the P251E code, what causes PTO engine shutdown circuit low, and how to diagnose and fix common issues to maintain optimal engine performance.

P251F OBD2: PTO Engine Shutdown Circuit High

JC Landry May 30, 2025

Learn all about the P251F code, what causes PTO engine shutdown circuit high, and how to diagnose and fix common issues to maintain optimal engine performance.

P2520 OBD2: A/C Request “A” Circuit Low

JC Landry May 30, 2025

Learn all about the P2520 code, what causes A/C request 'A' circuit low, and how to diagnose and fix common issues to maintain optimal engine performance.

P2521 OBD2: A/C Request “A” Circuit High

JC Landry May 30, 2025

Learn all about the P2521 code, what causes A/C Request "A" Circuit High, and how to diagnose and fix common issues to maintain optimal engine performance.

P2522 OBD2: A/C Request “B” Circuit

JC Landry May 30, 2025

Learn all about the P2522 code, what causes A/C request "B" circuit issues, and how to diagnose and fix common problems to maintain optimal vehicle performance.

P2523 OBD2: A/C Request “B” Circuit Low

JC Landry May 30, 2025

Learn all about the P2523 code, what causes A/C request 'B' circuit low, and how to diagnose and fix common issues to maintain optimal engine performance.

P2524 OBD2: A/C Request “B” Circuit High

JC Landry May 30, 2025

Learn all about the P2524 code, what causes A/C request "B" circuit high, and how to diagnose and fix common issues to maintain optimal engine performance.

P2525 OBD2: Vacuum Reservoir Pressure Sensor Circuit

JC Landry May 30, 2025

Learn all about the P2525 code, what causes issues in the vacuum reservoir pressure sensor circuit, and how to diagnose and fix common problems to maintain optimal engine performance.

P2526 OBD2: Vacuum Reservoir Pressure Sensor Circuit Range/Performance

JC Landry May 30, 2025

Learn all about the P2526 code, what causes vacuum reservoir pressure sensor circuit range/performance issues, and how to diagnose and fix common problems to maintain optimal engine performance.