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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET1990LUMINA V6-191 3.1LREPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )
1990 Chevrolet Lumina V6-191 3.1L
A L L Diagnostic Trouble Codes ( DTC )
1990 Chevrolet Lumina V6-191 3.1LSECTION A L L Diagnostic Trouble Codes ( DTC )
Testing and Inspection- Manufacturer Code Charts
- Related Tests, Information and Procedures
- A Charts
- C Charts
- Chart C-1A Park/Neutral Switch Diagnosis
- Chart C-1D Manifold Absolute Pressure (MAP) Sensor Circuit
- Chart C-1E Power Steering Pressure Switch (PSPS) Check
- Chart C-2A Injector Balance Test
- Chart C-3 Evaporative Emission Control System
- Chart C-4F Ignition Misfire Check
- Chart C-5 Electronic Spark Control (ESC) Check
- Chart C-6 Air Management Check (EDV)
- Chart C-7 EGR System Check
- Chart C-8A Torque Converter Clutch (TCC) Electrical Diagnosis
- Chart C-8B Manual Trans. Shift Light Check
- Chart C-8C Torque Converter Clutch
- Chart C-10 A/C Clutch Control
- Chart C-12 Coolant Fan Control Circuit
- Chart C-16 Coolant Level Sensor/Low Coolant Light
RENDER: 1.0x
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.