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.
1994 Porsche 911 Speedster, AutomaticFACTORY OEM SERVICE PROCEDURE
Engine Controls - Tests W/Codes
- Introduction
- Self-Diagnostic System
- Fault Code Diagnosis & Testing
- Code 1111: DME Power Supply
- Code 1112: Idle Speed Switch Short Circuit To Ground
- Code 1113: Full Throttle Switch Short Circuit To Ground
- Code 1114: Engine Coolant Temperature Sensor
- Code 1115: Idle Speed Switch Open Circuit
- Code 1121: MAF Sensor
- Code 1122: Idle Speed Control
- Code 1123: Oxygen Regulation Stop
- Code 1124: Heated Oxygen Sensor
- Code 1125: Intake Air Temperature Sensor
- Code 1131: Knock Sensor No. 1
- Code 1132: Knock Sensor No. 2
- Code 1133: DME Control Unit (Knock Control)
- Code 1134: Hall Effect Sensor
- Code 1141: DME Control Unit
- Code 1143: Fuel Tank Venting Solenoid
- Code 1144: Resonance Plate
- Code 1145: Malfunction Indicator Light (Mil)
- Codes 1151 Through 1156: Fuel Injectors
- ECM Location
- Summary
Factory Service Tools
Use the Manual With the Right Hardware
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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.