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 MANUALSSATURN1999SL2 AUTOMATIC, MP6REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROL SYSTEM - TESTS W/CODES - DTC P0135-P0204DTC P0200DTC P0200: INJECTOR CONTROL CIRCUIT (2.2L "J" BODY, 2.2L "S" SERIES & 2.4L "J" & "N" BODIES)DIAGNOSTIC PROCEDURES
1999 Saturn SL2 Automatic, MP6
Diagnostic Procedures
1999 Saturn SL2 Automatic, MP6SECTION Diagnostic Procedures
- Perform On-Board Diagnostic (OBD) system check. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK under SELF-DIAGNOSTIC SYSTEM in SELF-DIAGNOSTICS INTRODUCTION article. After performing OBD system check, go to next step.
- Attempt to start engine. If engine starts, go to next step. If engine will not start, see NO START DIAGNOSIS in appropriate BASIC DIAGNOSTIC PROCEDURES article.
- Turn ignition off. Remove air cleaner outlet resonator. Disconnect all injector connectors. Install an injector test light on No. 1 injector harness connector. Crank engine and observe test light. Check remaining fuel injectors. If test light flashes for all injectors, perform injector coil test. See FUEL SYSTEM in appropriate SYSTEM & COMPONENT TESTING article. If test light does not flash at all injectors, go to next step.
- If test light did not flash in step 3) but was on steady, go to next step. If test light did not flash in step 3) and was off, go to step 8.
- Remove injector test light from affected circuit. Turn ignition off. Disconnect PCM harness connector containing affected fuel injector circuit. Using a test light connected to battery positive, probe affected fuel injector driver circuits. If test light illuminates, go to next step. If test light does not illuminate, go to step 7.
- Repair short to ground in fuel injector driver circuit. After repairs, go to step 14.
- Replace PCM. Program replacement PCM using required equipment. After repairs, go to step 14.
- Using a test light connected to ground, probe ignition feed circuit terminal at affected fuel injector harness connector. Crank engine. If test light illuminates, go to next step. If test light does not illuminate, go to step 10.
- With test light still connected to ground, probe fuel injector driver circuit terminal at affected injector harness connector. Crank engine. If test light does not illuminate, go to step 11. If test light illuminates, go to step 12.
- Repair open in ignition feed circuit. After repairs, go to step 14.
- Check for open or faulty connection in fuel injector driver circuit. If a problem is found, go to step 13. If circuit is okay, go to step 7.
- Repair short to voltage in fuel injector driver circuit. After repairs, go to step 14.
- Repair open or faulty connection in fuel injector driver circuit. After repairs, go to next step.
- Reconnect all harness connectors. Using scan tool, clear DTCs. Start engine and allow it to idle. Ensure engine is at normal operating temperature. Operate vehicle within conditions required for setting this DTC. Select SPECIFIC DTC function, and then enter DTC which was set. If scan tool indicates that this test ran and passed, go to next step. If scan tool does not indicate that this test ran and passed, go to step 2.
- If any other DTCs are set, diagnose DTCs as necessary. If no other DTCs are set, system is okay.
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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.