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.

P0691 OBD2: Fan 1 Control Circuit Low

JC Landry August 24, 2025

Learn all about the P0691 code, what causes Fan 1 Control Circuit Low, and how to diagnose and fix common issues to maintain optimal engine performance.

P0692 OBD2: Fan 1 Control Circuit High

JC Landry August 24, 2025

Learn all about the P0692 code, what causes Fan 1 Control Circuit High, and how to diagnose and fix common issues to maintain optimal engine performance.

P0693 OBD2: Fan 2 Control Circuit Low

JC Landry August 24, 2025

Learn all about the P0693 code, what causes Fan 2 Control Circuit Low, and how to diagnose and fix common issues to maintain optimal engine performance.

P0694 OBD2: Fan 2 Control Circuit High

JC Landry August 24, 2025

Learn all about the P0694 code, what causes Fan 2 control circuit high, and how to diagnose and fix common issues to maintain optimal engine performance.

P0695 OBD2: Fan 3 Control Circuit Low

JC Landry August 24, 2025

Learn all about the P0695 code, what causes Fan 3 control circuit low issues, and how to diagnose and fix common problems to maintain optimal engine performance.

P0696 OBD2: Fan 3 Control Circuit High

JC Landry August 24, 2025

Learn all about the P0696 code, what causes fan 3 control circuit high, and how to diagnose and fix common issues to maintain optimal engine performance.

P0697 OBD2: Sensor Reference Voltage “C” Circuit/Open

JC Landry August 24, 2025

Learn all about the P0697 code, what causes sensor reference voltage circuit/open issues, and how to diagnose and fix common problems to maintain optimal engine performance.

P0698 OBD2: Sensor Reference Voltage “C” Circuit Low

JC Landry August 24, 2025

Learn all about the P0698 code, what causes Sensor Reference Voltage "C" Circuit Low, and how to diagnose and fix common issues to maintain optimal engine performance.

P0699 OBD2: Sensor Reference Voltage “C” Circuit High

JC Landry August 24, 2025

Learn all about the P0699 code, what causes issues in the sensor reference voltage circuit, and how to diagnose and fix common problems to maintain optimal engine performance.

P069A OBD2: Cylinder 9 Glow Plug Control Circuit Low

JC Landry August 24, 2025

Learn all about the P069A code, what causes cylinder 9 glow plug control circuit low, and how to diagnose and fix common issues to maintain optimal engine performance.