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 MANUALSCHEVROLET2003TRACKER 4D UTILITY, 2.0 C, 4WD, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROL SYSTEM SELF-DIAGNOSTICS - 2.0LDRIVE CYCLESINSPECTION/MAINTENANCE COMPLETE SYSTEM SET PROCEDURETEST DESCRIPTION
2003 Chevrolet Tracker 4D Utility, 2.0 C, 4WD, Standard
Test Description
2003 Chevrolet Tracker 4D Utility, 2.0 C, 4WD, StandardSECTION Test Description
The numbers below refer to the step numbers in the diagnostic procedures.
- Make sure you perform the I/M System Check before performing this test. Failure to do so may result in difficulty updating the status to YES.
- 1 - This step is to run the HO2S Heater Tests. Preprogramming the scan tool will reduce the amount of time the oxygen sensor heaters operate while verifying the enable criteria.
- 2 - This step is to run the Catalyst Test. The Catalyst Test runs during the specified cruise period.
- 3 - This step is to run the Catalyst Test. The Catalyst Test runs during the specified cruise period.
- 4 - This step is to run the EGR Tests. The EGR Tests are run during a gradual deceleration with a closed throttle. The vehicle speed is required in order to maintain a high, steady MAP signal. If the vehicle is not equipped with an EGR System, this step is not necessary and the testing can continue at step 5.
- 5 - This step is to run the Oxygen Sensor Tests. These tests run during the idle period immediately following a cruise period that meets a minimum calibrated RPM and time period.
- 6 - This step is to run the EVAP Tests. These tests run during the idle period immediately following a cruise period that meets a minimum calibrated RPM and time period.
- 8 - The I/M System Status only reports on whether or not a diagnostic has run, not the outcome of the test. If any emission related DTC sets after the tests are complete, the DTC will require 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.