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Check Engine Light On?




The following articles can help you figure out why your Check Engine Light is on:

typical check engine lights

Check Engine Light, Diagnostic Trouble Code & Scan Tool Articles:

Check Engine Light OnBoard Diagnostics

Trouble Code Diagnostic Help for Types of Codes

TROUBLE CODE Help

More on Check Engine Lights & Fault Code Diagnostics

Ford P0171 & P0174 Lean Codes

Other Warning Lights (TEMP, OIL, ALT/GEN, BRAKES, ABS, AIR BAGS, etc.)

Scan Tool Diagnostics

Scan Tool Help

Scan Tool Companion software (available as a download or on a CD)



Decoding Onboard Diagnostics

Understanding OBD II Driveability & Emissions Problems

Zeroing in on OBD II Diagnostics

Controller Area Network (CAN) Diagnostics

Troubleshooting Intermittent Engine Problems

Troubleshooting Engine Problems wtih Temperature

More On Investigating Intermittent Engine Stalling Problems

OBD II Diagnostic Tips

Mode 06 Onboard Diagnostics

Help with DTC P0300 Random Misfire Codes

Troubleshooting a P0420 Catalyst Fault Code


Got a Fault Code Problem or Question? Need Help Now? Click the Banner Below to Ask an Expert:
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Diagnostic Help Software:

scan tool companion information

Scan Tool Companion diagnostic software Scan Tool Companion


Sensor Guide diagnostic training software Sensor Guide software


OBD II Guide diagnostic training software Onboard Diagnostics (OBD2)Guide software


Emission Guide training software Emission Guide software





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trouble codes Be sure to visit our other websites:

AA1Car Diagnostic Help

Auto Repair Yourself

CarleySoftware

OBD2HELP.com

Random-Misfire.com

Scan Tool Help

TROUBLE-CODES