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200+ OBD-II Diagnostic Terms and Meanings | Complete Automotive Fault Glossary Learn 200+ common OBD-II diagnostic terms used in scan tools and DTC descriptions. Understand fault meanings such as Open Circuit, Short to Ground, High Voltage, Intermittent, Circuit High, Circuit Low, Performance, Range, and many more in one complete automotive glossa Open Circuit The electrical circuit is interrupted, preventing current from flowing to the component. Short to Ground The circuit is unintentionally connected to ground, causing signal loss or excessive current flow. Short to Voltage The circuit is accidentally connected to battery voltage, producing an abnormally high electrical signal. Short Between Wires Two electrical wires are unintentionally connected, affecting normal circuit operation. Circuit High The control module detects a circuit voltage higher than the specified operating range. Circuit Low The detected circuit voltage is below the manufac...

Open Circuit The electrical circuit is interrupted and current cannot flow. Short to Ground The circuit is directly connected to ground. High Voltage Circuit voltage is above the expected operating range. Intermittent The fault appears and disappears during operation.

No Communication No data exchange is detected with the target module. Bus Error A communication bus error has been detected. CAN Bus Off The CAN controller has entered the Bus-Off state.

OBD-II Code PXXXX Meaning, Symptoms and Fix | OBD Spark OBD-II Code PXXXX: Meaning, Symptoms, Causes & Fix OBD-II trouble code PXXXX indicates an issue related to the engine management system. This guide helps technicians, students, and car owners understand the fault and how to diagnose it correctly. Quick Summary: Code Type: Powertrain Severity: Medium / High Common Issue: Sensor or wiring fault What Does PXXXX Mean? Explain the technical meaning here in simple + professional language. Include ECU logic and system behavior. Symptoms Check Engine Light ON Engine hesitation or misfire High fuel consumption Reduced power Possible Causes Cause Description Faulty Sensor MAP / MAF / TPS sensor failure or unstable signal Wiring Issue Broken, corroded or shor...