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Hyundai Tech Tip: No Spark, No Injector Pulse on 2002 Sonata 2.4 L Models
You may get a customer complaint that the vehicle died while in Drive, then wouldn’t start. There is no spark and no injector pulse, and no engine rpm on the scanner while cranking, and it's setting a Crankshaft Position (CKP) sensor code P0335. More
Ignition Sensor Diagnostics: Variable-Reluctor, Hall Effect and Magneto-Resistive Sensors
Although ignition failures are relatively common, they're not the easiest problem to diagnose. To help you get started on what I call a "systems approach" to ignition diagnostics, this article is intended to provide an overview of how to identify ignition system configurations, identify three different types of ignition sensors and understand several basic sensor-operating strategies. More
Engine Maintenance: OBD II Diagnostics, Misfire Codes, Fuel Trim Faults, Driveability and More
As automotive electronics diagnostics continues to evolve, so do the tools that are need to diagnose and repair today's complex engine and electronics systems. This lineup will arm you will some diagnostic tips and give you some invaluable service advantages on Porsche, BMW, Hyundai and Mazda models. More
Kia Tech Tip: DTC P0460 Update for Sephia Models
The original logic used for DTC P0460 (fuel level sensor circuit malfunction) in 2000 model year Sephias would illuminate the MIL and store a fault code for circuit-related problems (open or short), and for a fuel level input signal that failed to stay within the "plausibility" test limits stored in the ECM. "Plausibility" or "rationality" checks are frequently built into the ECM software to make sure... More
Toyota Tech Tip: MIL On, Misfire DTCs Set on 1MZ-FE Engines
Some vehicles equipped with 1MZ-FE (V6) engines without VVTi may exhibit a rough idle and/or an MIL-on condition with a diagnostic trouble code or codes for misfire caused by an improperly operating ignition coil assembly. Production changes have been implemented to prevent this condition from occurring. More
Mitch Schneider: How To Handle Customer Anxiety Over Intermittent Problems
Intermittent automotive service problems are one of the few things capable of terrifying and paralyzing folks on both sides of the service counter. More
Tech Feature: Diagnosing the Blue Car Syndrom of a Random Stalling Condition
Blue Car Syndrome is the non-technical term for a very common phenomenon. It is the experience that many people possess regarding having a specific observation, idea, experience, etc., enter one's consciousness, and then having it seem that the same observation or experience begins to occur with increased frequency. More
Tech Feature: Making $ (Money) with Mode $06
Mode $06 is one of the nine diagnostic modes that is part of the OBD II on-board diagnostics system on all 1996 and newer vehicles. More
Tool Feature: Scan Tools and Software Updates
Though some vehicles have diagnostic modes that can show fault codes and other diagnostic information via the instrument panel, climate control system or driver information display, most simply turn on the check engine light or another warning light when a problem occurs. So without a scan tool, there's no way to tell what the problem might be, let alone make an accurate diagnosis of which sensor or... More
Tech Feature: Predicting Failures Through Mode $06
The PCM has several diagnostic modes. Depending on your scan tool and your use of it, you may get to see some or all of these modes. Also, depending on your scan tool, you may be accessing the various modes in the PCM without referring to them as "modes." More
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