Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2001METRO L4-079 1.3L VIN 2 MFIREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONINITIAL INSPECTION AND DIAGNOSTIC OVERVIEWPOWERTRAIN OBD SYSTEM CHECK
2001 Chevrolet Metro L4-079 1.3L VIN 2 MFI
Powertrain OBD System Check
2001 Chevrolet Metro L4-079 1.3L VIN 2 MFISECTION Powertrain OBD System Check
IMPORTANT: Using the table correctly can reduce diagnosis time and prevent the unnecessary replacement of parts.
The Powertrain OBD System Check is an organized approach for identifying a problem. After the visual inspection is complete, perform the Powertrain OBD System Check. This Powertrain OBD System Check will provide a direction for diagnosis of the following problems:
^ A faulty PCM or an inoperative PCM
^ No serial data
^ An inoperative Malfunction Indicator Lamp (MIL)
^ Any PCM DTCs
^ A rich fuel system or a lean fuel system
^ Customer Complaint Driveability Symptoms
The Powertrain OBD System Check is a master table for driveability diagnosis and for emissions system diagnosis. Use the Powertrain OBD System Check as the starting point for any engine control system diagnosis.
The Powertrain OBD System Check is an organized approach for identifying a problem. After the visual inspection is complete, perform the Powertrain OBD System Check. This Powertrain OBD System Check will provide a direction for diagnosis of the following problems:
^ A faulty PCM or an inoperative PCM
^ No serial data
^ An inoperative Malfunction Indicator Lamp (MIL)
^ Any PCM DTCs
^ A rich fuel system or a lean fuel system
^ Customer Complaint Driveability Symptoms
The Powertrain OBD System Check is a master table for driveability diagnosis and for emissions system diagnosis. Use the Powertrain OBD System Check as the starting point for any engine control system diagnosis.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.