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 MANUALSCHEVROLET1998METRO L4-079 1.3L VIN 2 MFIREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULEDESCRIPTION AND OPERATIONCOMMON OBD II SYSTEMSPRELIMINARY INFORMATION
1998 Chevrolet Metro L4-079 1.3L VIN 2 MFI
Preliminary Information
1998 Chevrolet Metro L4-079 1.3L VIN 2 MFISECTION Preliminary Information
The Chevrolet Metro conforms to all OBD 2 mandated emission regulations. The powertrain control module (PCM) is responsible for monitoring and modifying engine controls in order to meet all OBD 2 requirements. Certain minimum criteria for how the PCM monitors and diagnoses the emission system is specified in the OBD 2 regulations. The following information describes the common operations and terms of the OBD 2 regulations that the Metro PCM is designed to adhere to.
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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.