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 MANUALSSATURN2000SC2 AUTOMATIC, MP6REPAIR AND DIAGNOSISENGINE MECHANICALENGINE EXHAUST SYSTEMDIAGNOSTICSRESTRICTED EXHAUST SYSTEM CHECKTEST METHOD (PERFORMED DURING TEST)
2000 Saturn SC2 Automatic, MP6
Test Method (Performed During Test)
2000 Saturn SC2 Automatic, MP6SECTION Test Method (Performed During Test)
- Remove the oxygen sensor.
- Install gauge bar set (SA9127E) into the exhaust manifold. The thread designation is M18X1.50.NOTE: Do not use the 0-60 in. HO gage when performing this test, as it will be permanently damaged due to the excessive back pressure during accelerations. Use the 0-690 kPa (0-100 psi) gauge and appropriate hoses in service gauge bar kit SA9127E.
- Connect the gauge bar set (SA9127E), 0-861 kPa (0-100 psi) gauge.
- With the engine at normal operating temperature, perform a 15 mph road test. Automatic transaxles should be in "D" and manual Transaxles in "3rd" gear. Maximum exhaust back pressure readings are taken during short wide open throttle accelerations.NOTE: If the exhaust pressure exceeds the specification, inspect for a dented or collapsed exhaust pipe. It may be necessary to disconnect the exhaust pipe before or behind the converter and repeat Step 4 . If removing the muffler does not lower the back pressure, disconnect the three way catalytic converter from the front exhaust pipe and repeat the test.
- The maximum exhaust back pressure during wide open throttle accelerations must be less than 50 kPa (7.25 psi).
- Replace any part of the exhaust system found to be damaged.
- Install anti-seize on the oxygen sensor's threads and install the sensor. It may be necessary to disconnect the negative battery terminal in order to clear any codes set while operating the engine with the oxygen sensor removed or disconnected.
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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.