THE GOTECH LIBRARY
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60 resources
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- Original repair guide
Replace a 4x4 Vacuum Actuated Hub (IWE)
The integrated wheel end (IWE) on Ford F-150 4x4 is known to make a clicking or ratcheting sound when it begins to fail. This is usually due to a vacuum leak in the actuator. Learn how to diagnose and replace it step by step, including torque specs.
- Reference resource
Cooling Fan Switch Database
View the entire WVE line of cooling fan switches with specs
- Original repair guide
How to Diagnose Ford F-150 Wheel Bearing Hub Assembly
Diagnosing a wheel bearing concern can be a daunting task. We have simplified the process to help you quickly and accurately identify a wheel bearing issue on your Ford F-150.
- Original repair guide
GM 2.4L VVT Solenoid Resistance Test with a Multimeter
Follow GoTech's GM 2.4L VVT solenoid resistance test with a multimeter, including setup, source-video moments and related VVT guides.
- Original repair guide
EVAP canister: storage, flow and restriction clues
Understand vapor storage and the outlet path. See why the Dart refueling symptom led to a remote filter rather than a canister verdict.
- Original article
ESIM explained: test modes and system boundaries
Understand the engine-off and engine-running modes described in GoTech’s ESIM article, with a separate 2014 Dodge Dart refueling case.
- Original repair guide
Fuel-tank pressure sensor: interpret the evidence
Understand FTP feedback, a fixed reading and the Sierra case. Separate scan-tool data, circuit evidence and a functional recheck.
- Original repair guide
EVAP smoke testing: know what the test covers
A 2011 Chevrolet Traverse 3.6L smoke-test demonstration: system setup, connection coverage, the excluded purge valve and intermittent-fault limits.
- Original repair guide
EVAP purge valve: sealing, actuation and flow
Three questions for purge-valve evidence: does it seal, does it respond, and does the expected flow follow? See why a downstream smoke test excludes it.
- Reference resource
EVAP pressure unit converter and reference
Convert Pa, kPa, psi, conventional inches of water and inches of mercury. Preserve the reading’s pressure reference and sign convention.
- Original repair guide
EVAP vent solenoid: flow, sealing and evidence
Separate an open vent path, a commanded response and sealing performance. Use purge/seal context before interpreting a vent-system code.
- Reference resource
Firing Order Database
Identify firing order by vehicle
- Original repair guide
How to Fix a Ford P1450 EVAP Code
Step by step instructions on how to diagnose and repair a Ford with a P1450 EVAP Code.
- Original repair guide
GM 1.4L P0171: PCV Checks and Repair Guide
Follow GoTech's GM 1.4L P0171 guide through symptoms, PCV checks, repair steps and confirmation, with source-video moments throughout.
- Original repair guide
How to Fix P0521, P0522, P0523 Codes on GM V8
Learn what can cause a P0521, P0522 or P0523 trouble code to set on a GM V8 engine and how to fix it
- Original repair guide
Fix Chevy Cruze/Aveo/Sonic P0597 & P0598 — Thermostat Heater Circuit (1.8L)
Diagnose and repair Chevy Cruze/Aveo/Sonic 1.8L codes P0597/P0598. Includes thermostat resistance spec (~13–15Ω), control circuit test-light method, replacement steps, tools, torque, and video.
- Original repair guide
Fix Tire Pressure Light
What the tire pressure (TPMS) light means, common causes, and step-by-step ways to fix and reset it—including drive cycles, button resets, and relearn procedures.
- Original article
3.6L GM Misfire
This 2014 Chevy Impala 3.6L had a misfire that was misdiagnosed by multiple shops. Its time to put it through our diagnostic process here at GoTech and get to the root cause of the problem.
- Original article
GM 3.6L Timing Chain Diagnosis
Follow GoTech's GM 3.6L timing-chain diagnostic outline, with related-code context and links to VVT operation and the labscope test.
- Original article
GM 3.6L Timing Chain and Reluctor Ring Problems
Read GoTech's original GM 3.6L timing-chain and reluctor ring discussion, with bulletin illustrations and links to diagnosis and replacement guides.
- Original article
GM 3.6L Timing Chain Problems: Symptoms, Codes and Diagnosis
Understand the symptoms and code context in GoTech's GM 3.6L timing-chain overview, then continue to diagnosis, labscope testing or replacement.
- Original repair guide
How to Diagnose a P0420 Code
Learn how to diagnose P0420/P0430 codes with leak checks, O₂ sensor graphs, and confirmation steps before replacing the catalytic converter.
- Original repair guide
How To Replace Driver Side Window Switch Mazda CX-7
Learn how to replace the driver side window switch in a Mazda CX-7 in under 30 min.
- Original repair guide
How to Test an Oxygen Sensor
Step-by-step guide to diagnose, test, and replace oxygen sensors related to P0420 catalyst efficiency codes.
- Original repair guide
How To Use Your Ohm Meter
Learn how to setup your Ohm meter for testing, the difference between manual adjust and auto ranging, and how to understand the readings.
- Original repair guide
Knock Sensor Replacement Procedure
Learn how to replace a knock sensor on a 2006-2011 1.6L Kia Rio or Hyundai Accent
- Reference resource
Oil Pressure Switch Database
View the entire WVE line of oil pressure switches with specs
- Original article
P0171 and P0174 Lean Trouble Codes
Learn what P0171 and P0174 trouble codes mean, their symptoms, how to diagnose, and how to correct these codes
- Original article
P0172 and P0175 Rich Trouble Codes
Learn what P0172 and P0175 trouble codes mean, their symptoms, how to diagnose, and how to correct these codes
- Original article
P0300 Misfire Trouble Code
Learn what a P0300 trouble code means, its symptoms, how to diagnose, and how to clear the diagnostic trouble code
- Original repair guide
P0420 Catalytic Converter Trouble Code
DTC P0420 sets when the catalytic convertor fails to efficiently remove harmful pollutants from the engines exhaust gas.
- Original repair guide
Parasitic Battery Draw Test
A dead battery causing your car to not start is never fun. You recharge the battery or replace it and the vehicle’s alternator is functioning properly, but the car doesn’t start again the next day. The battery is dead again! This is called a parasitic draw or an unintended battery drain.
- Original article
Purge/seal EVAP: understand the monitor sequence
Follow vacuum generation, sealing, pressure observation and recovery in the GoTech purge/seal explanation. Keep application-specific thresholds separate.
- Reference resource
Relay Database
Identify voltage rating, terminal count, amperage, OE numbers and diagrams for relays.
- Original repair guide
How to Replace a 2011-2014 Ford F-150 Wheel Bearing Hub Assembly
Step by step instructions, including video, of how to replace your front driverside wheel bearing on a 2011-2014 Ford F-150.
- Original repair guide
How to Replace a 2015-2020 Ford F-150 Cabin Air Filter
Step by step instructions, including video, of how to replace the cabin air filter on a 2015-2020 Ford F-150.
- Original repair guide
How to Replace a GM 3.6L Timing Chain
Follow GoTech's GM 3.6L timing-chain replacement guide with video, timing-mark illustrations, installation steps and final timing checks.
- Original repair guide
How to Replace a GM 4.8L, 5.3L, 6.0L Oil Pressure Sensor
Learn how to replace a GM V8 4.8L, 5.3L, 6.0L engine oil pressure sensor in under 60 minutes.
- Original repair guide
How to Replace the Timing Chain and Water Pump on a Ford 3.5L
See Mike's 2010 Ford Fusion 3.5L timing-chain and water-pump repair, with stage-specific timing diagrams, video moments and preparation notes.
- Original repair guide
How to Replace a VVT Solenoid on a GM 2.4L
Step by step instructions of how to replace a variable valve timing solenoid on a GM 2.4L
- Original article
Split EVAP systems: know which section was tested
Understand the isolation boundary described in GoTech’s split purge/seal article and why one section’s test cannot establish a whole-system result.
- Reference resource
Starter Solenoid Database
Lookup starter solenoids by part number or through voltage rating and terminal count
- Original repair guide
How to Test a GM 3.6L Timing Chain
Learn how to test GM 3.L timing chain problems with a labscope - P0008, P0016, P0017 etc
- Original article
What is EVAP? Vapor storage, purge and venting
Learn the roles in a purge/seal EVAP system, then choose a relevant path for repeated nozzle shutoff, P0446 or smoke-test coverage.
- Original article
What is Variable Valve Timing (VVT)
VVT is a system designed to adjust the timing of an engines valves to optimize performance and lower emissions throughout the engines entire operating range
- Learning path
CAN Bus Lessons: Networks, Topology & Case Reasoning
Study CAN bus access paths, topology and the Subaru Ascent case through three GoTech lessons with worked examples, video timestamps and reasoning checks.
- Lesson
CAN bus communication: find the network that matters
Separate scan access from the affected CAN bus network using Escalade and Acadia examples, video timestamps and three reasoning checks with feedback.
- Lesson
CAN bus troubleshooting: reason through the Ascent case
Follow the Subaru Ascent CAN bus case from module response patterns to revised interpretations. Compare temporary recovery with repair confirmation.
- Lesson
CAN bus wiring and topology: choose the relevant branch
Study CAN bus junctions, harness paths and isolation context through source examples, timestamped video callouts and three reasoning checks with feedback.
- Learning path
Wiring Diagram Lessons: Circuits, Voltage & Context
Learn to read wiring diagrams and interpret voltage clues through horn, coil and blower examples, with three GoTech lessons and questions with feedback.
- Lesson
Wiring Diagrams: Missing Context & Voltage
Study connector references, the Taurus coil example and a voltage-reading quiz. Learn what a wiring diagram leaves out, then check your reasoning.
- Lesson
Wiring Diagnosis: Voltage Clues & Blower Controls
Work through the coil quiz and manual versus automatic blower examples. Learn what one voltage reading leaves unknown, with questions and feedback.
- Lesson
Wiring Diagram Basics: Read the Circuit
Learn to follow load, control and ground paths in wiring diagrams using the horn example, timestamped video callouts and three questions with feedback.
- Concept reference
Does communication prove a repair?
The source transcript reports TCM communication during temporary substitution. This source packet does not establish ECM replacement, successful engine start, a complete rescan or final vehicle confirmation. Later narration also mentions brake and HVAC communication; these reports still do not establish a completed repair.
- Concept reference
Does 60 ohms mean the network is good?
A resistance reading only has meaning relative to the cited branch/topology, connection state, test point and applicable source expectation. The Ascent lesson changes its interpretation after identifying the diagnostic-port branch; a number alone does not establish whole-network health.
- Concept reference
What does one voltage reading leave unknown?
The third wiring lesson explains that this given reading alone neither settles short-to-power nor verifies operating primary-circuit health. Retain the hypothetical premise and its reference/state.
- Source-backed case companion
GM P0446: follow the pressure evidence
Follow a 2005 GMC Sierra 5.3L P0446 case: pressure-response clues, circuit checks and the demonstrated retest. Includes source video chapters.
- Source-backed case companion
Fuel nozzle keeps clicking off: Dodge Dart case
See how GoTech traced repeated fuel-nozzle shutoff on a 2014 Dodge Dart to its remote EVAP filter, with ESIM context and a refueling recheck.
- EVAP problem finder
EVAP diagnosis: find your next useful check
Start with a P0446 code, repeated fuel-nozzle shutoff or an EVAP leak test. Follow source-backed cases and find the right system explanation.