Codes Archives - Tomorrows Technician
Misfire Codes After A Spark Plug Replacement (Video)

After replacing spark plugs, you may get a handful of misfire codes. This video is sponsored by Autolite.

Diagnosing A P0316 Code (Video)

Code P0316: Engine Misfire Detected on Startup (First 1000 Revolutions) could have many causes. Sponsored by Autolite.

What causes a P0420 code? (VIDEO)

If the front signals and the rear signals look identical, the catalyst is not doing its job. Sponsored by AP Emissions.

Tech IQ: Getting Rid of Code P0315

The code might set again when the engine is cranked. This video is sponsored by Auto Value and Bumper to Bumper.

New Entry-Level Heavy-Duty OBD Code Reader from Launch

Technicians can read and erase DTCs on light-, medium- and heavy-duty vehicles from 1996 and newer.

VIDEO: Code P0128 And Cooling System Leaks

The first diagnostic step is to find and fix the leak. This video is sponsored by Bar’s Leaks.

VIDEO: Getting More Information On Generic Codes

Andrew Markel demonstrates how to easily and efficiently gain more information on a code on a specific vehicle that may not tell you much by itself.

Piercing And Probing Wires With The Least Damage Possible

The Hippocratic Oath states a doctor shall “do no harm.” The technician’s oath is the same, but we “do no harm” to a vehicle we are trying to diagnose or repair. 

Top 10 OBDII Codes Quick Quiz

Can you diagnose OBDII DTC’s in less than 10 minutes? Take this four question quiz to test your diagnostic strategies when tackling the most common OBD II codes.

OBD II O2 Slow Response Codes Technical Tip Clip

In this tech tip clip excerpt from the AVI class ‘Top 10 OBD 2 Codes: Fix Them Fast’ training program instructor Dave Scaler talks about slow response codes. Current generation o2 sensor heaters are controlled by the computer, and cars today go into closed loop faster than ever on todays cars. Dave talks about the two downsides of this situation and how they effect your diagnostic process. He goes on to further detail the diagnostic processes involved in solving O2 sensor slow codes.

A2 Transmission Performance Codes Tip Clip

In this clip from the ASE A2 Transmission Diagnostics test prep program, Wayne Colonna talks about transmission performance codes. He talks about how on some computer controlled transmissions if there is a code stored or shift adapt issues the computers strategy is to overcome this slip by increasing line pressure. He talks about the problems this can cause during the diagnostic process and how to overcome these issues.