Engine Sensors and Diagnostic Systems

OBD2 diagnostic codes are essential for identifying modern engine problems. Sensors provide real-time data that the engine control unit uses to adjust performance.

This category teaches you how to diagnose sensor failures and interpret diagnostic data correctly.

Common problems covered:

Check engine light diagnosis
Faulty sensor readings
OBD2 code interpretation
Data-driven troubleshooting

Learn how to use diagnostic tools and avoid guessing when repairing your vehicle.

Honda OBD1 Codes: How to Read Check Engine Light Without a Scanner

05/04/2026

It’s the weekend, you’re out enjoying a drive—and suddenly, your check engine light comes on. Now you’re left wondering: what’s wrong with the engine? The good news is that if your vehicle uses OBD1, you […]

Reduced Engine Power Warning Light – What To Do And Why?

12/07/2025

Reduced Engine Power, can have many different names. All depending on the year, make and model of your vehicle. So, whether its, reduced engine power, limp mode, fail safe mode or limp home mode, they […]

Check Engine Light (CEL) – What Can Cause It To Come On

11/28/2025

Seeing a Check Engine Light (CEL), is one of the most frustrating and confusing factors of owning a vehicle. So, the (CEL) is just a light, with no information. It tells you that there is […]

Throttle Position Sensor (TPS) – Function – Failure – Testing

09/03/2025

So, the throttle position sensors function (TPS), is to supply vital information to the vehicles engine control unit (ECU). And, this information is based on, the actual position of the engines throttle valve. So, your […]

Ignition Timing – The Spark Plug Has To Fire At The Proper Time

08/04/2025

So, your engine needs proper ignition timing, to ignite the fuel at exactly the right time. But, what happens if the ignition system fires, at the wrong time. As a result, the air fuel mixture, […]

Dash Warning Lights – Only Provide A Warning Something Is Wrong

06/21/2025

Most dash warning lights, tell you that a fault has occurred inside the vehicle’s system. So, dash warning lights provide an idea – sometimes precise, sometimes vague – of what’s wrong with a vehicle. But, […]

O2 Oxygen Sensor Symptoms (Causes, Testing & Replacement Guide)

03/10/2025

The, O2 Oxygen Sensor, measures the difference, between the amount of O2 in the exhaust gas. And, the amount of O2 in air. With the O2 oxygen sensor information and other sources, the (ECU) can decide, […]

Engine Coolant Temperature Sensor (ECT) Replacement

Engine Coolant Temperature Sensor: Step By Step Replacement

12/17/2024

The engine coolant temperature sensor, is one of the most important engine management sensors in your vehicle. So, a sensor that is shorted or reading out of range, can’t provide a reliable signal. Consequently, engine […]

Automotive Sensors: Monitoring Your Vehicle’s Vital Signs

10/27/2024

Before the use of computerized automotive sensors, fixing a car was way easier. In the old days, it was a lot different. For instance, either moving a distributor, or adjusting a screw on a carburetor, […]

Engine Coolant Temperature (ECT) Sensor Location

Engine Coolant Temperature (ECT) Sensor: Failure Signs: Testing

09/23/2024

The engine coolant temperature (ECT) sensors function, is to monitor the temperature of the engine’s coolant. So, most engine coolant temperature (ECT) sensors operate, using electrical resistance to measure the temperature of the coolant. The […]