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.

P204D OBD2: Reductant Pressure Sensor Circuit High

JC Landry July 6, 2025

Learn all about the P204D code, what causes reductant pressure sensor circuit high, and how to diagnose and fix common issues to maintain optimal engine performance.

P204E OBD2: Reductant Pressure Sensor Circuit Intermittent/Erratic

JC Landry June 29, 2025

Learn all about the P204E code, what causes reductant pressure sensor circuit intermittent/erratic issues, and how to diagnose and fix common problems to maintain optimal engine performance.

P204F OBD2: Reductant System Performance

JC Landry June 29, 2025

Learn all about the P204F code, what causes reductant system performance issues, and how to diagnose and fix common problems to maintain optimal engine performance.

P2050 OBD2: Reductant Injection Valve Circuit/Open

JC Landry June 29, 2025

Learn all about the P2050 code, what causes reductant injection valve circuit issues, and how to diagnose and fix common problems to maintain optimal engine performance.

P2051 OBD2: Reductant Injection Valve Circuit Low

JC Landry June 29, 2025

Learn all about the P2051 code, what causes reductant injection valve circuit low, and how to diagnose and fix common issues to maintain optimal engine performance.

P2052 OBD2: Reductant Injection Valve Circuit High

JC Landry June 29, 2025

Learn all about the P2052 code, what causes reductant injection valve circuit high, and how to diagnose and fix common issues to maintain optimal engine performance.

P2053 OBD2: Reductant Injection Valve Circuit/Open

JC Landry June 29, 2025

Learn all about the P2053 code, what causes the reductant injection valve circuit/open issue, and how to diagnose and fix common issues to maintain optimal engine performance.

P2054 OBD2: Reductant Injection Valve Circuit Low

JC Landry June 29, 2025

Learn all about the P2054 code, what causes reductant injection valve circuit low, and how to diagnose and fix common issues to maintain optimal engine performance.

P2055 OBD2: Reductant Injection Valve Circuit High

JC Landry June 29, 2025

Learn all about the P2055 code, what causes high voltage in the reductant injection valve circuit, and how to diagnose and fix common issues to maintain optimal engine performance.

P2056 OBD2: Reductant Injection Valve Circuit/Open

JC Landry June 29, 2025

Learn all about the P2056 code, what causes reductant injection valve circuit/open issues, and how to diagnose and fix common problems to maintain optimal engine performance.