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.
1997 Cadillac CateraFACTORY OEM SERVICE PROCEDURE
Engine Control System - Tests W/Codes - 3.0L
- Introduction
- Self-Diagnostic System
- Notes
- Hard Failures
- Intermittent Failures
- DTC Info Mode
- DTC Status
- Fail This IGN.
- History
- Last Test Fail
- Mil Request
- Not Run SCC
- Test Fail SCC
- Failed Since Clear
- Not Run Since Cl.
- Not Run This IGN.
- Test Ran And Passed
- Diagnostic Procedure
- Reading Trouble Codes
- Trouble Code Definitions
- Hard Or Intermittent Trouble Code Determination
- Clearing Diagnostic Trouble Codes (DTC)
- ECM/Pcm/VCM Location
- Diagnostic Materials
- Special Tools (Diagnostic)
- Scan Tool Usage
- Scan Data
- Summary
- Connector Identification
- Diagnostic Trouble Codes
- Notes
- DTC P0100 - MAF Sensor Circuit
- DTC P0101 - MAF Sensor System Performance
- DTC P0110 - IAT Sensor Circuit
- DTC P0115 - ECT Sensor Circuit
- DTC P0116 - ECT Sensor Circuit Performance
- DTC P0120 - TP Sensor Circuit
- DTC P0130 - Ho2S Circuit Bank 1, Sensor 1
- DTC P0131 - Ho2S Circuit Low Voltage Bank 1, Sensor 1
- DTC P0132 - Ho2S Circuit High Voltage Bank 1, Sensor 1
- DTC P0133 - Ho2S Slow Response Bank 1, Sensor 1
- DTC P0134 - Ho2S Insufficient Activity Bank 1, Sensor 1
- DTC P0135 - Ho2S Heater Circuit Bank 1, Sensor 1
- DTC P0136 - Ho2S Circuit Bank 1, Sensor 2
- DTC P0137 - Ho2S Circuit Low Voltage Bank 1, Sensor 2
- DTC P0138 - Ho2S Circuit High Voltage Bank 1, Sensor 2
- DTC P0140 - Ho2S Insufficient Activity Bank 1, Sensor 2
- DTC P0141 - Ho2S Heater Circuit Bank 1, Sensor 2
- DTC P0150 - Ho2S Circuit Bank 2, Sensor 1
- DTC P0151 - Ho2S Circuit Low Voltage Bank 2, Sensor 1
- DTC P0152 - Ho2S Circuit High Voltage Bank 2, Sensor 1
- DTC P0153 - Ho2S Slow Response Bank 2, Sensor 1
- DTC P0154 - Ho2S Insufficient Activity Bank 2, Sensor 1
- DTC P0155 - Ho2S Heater Circuit Bank 2, Sensor 1
- DTC P0156 - Ho2S Circuit Bank 2, Sensor 2
- DTC P0157 - Ho2S Circuit Low Voltage Bank 2, Sensor 2
- DTC P0158 - Ho2S Circuit High Voltage Bank 2, Sensor 2
- DTC P0160 - Ho2S Insufficient Activity Bank 2, Sensor 2
- DTC P0161 - Ho2S Heater Circuit Bank 2, Sensor 2
- DTC P0171 - Fuel Trim System Lean, Bank 1
- DTC P0172 - Fuel Trim System Rich, Bank 1
- DTC P0174 - Fuel Trim System Lean, Bank 2
- DTC P0175 - Fuel Trim System Rich, Bank 2
- DTC P0201 - Injector No. 1 Control Circuit
- DTC P0202 - Injector No. 2 Control Circuit
- DTC P0203 - Injector No. 3 Control Circuit
- DTC P0204 - Injector No. 4 Control Circuit
- DTC P0205 - Injector No. 5 Control Circuit
- DTC P0206 - Injector No. 6 Control Circuit
- DTC P0230 - Fuel Pump Control Circuit
- DTC P0300 - Engine Misfire Detected
- DTC P0301 - Cylinder No. 1 Misfire Detected
- DTC P0302 - Cylinder No. 2 Misfire Detected
- DTC P0303 - Cylinder No. 3 Misfire Detected
- DTC P0304 - Cylinder No. 4 Misfire Detected
- DTC P0305 - Cylinder No. 5 Misfire Detected
- DTC P0306 - Cylinder No. 6 Misfire Detected
- DTC P0325 - Knock Sensor Circuit Bank 1
- DTC P0330 - Knock Sensor Circuit Bank 2
- DTC P0335 - Crankshaft Position Sensor Circuit
- DTC P0336 - Crankshaft Position Sensor System Performance
- DTC P0340 - Camshaft Position Sensor Circuit
- DTC P0410 - Air System Constant Flow Detected
- DTC P0411 - Air System No Flow Detected
- DTC P0412 - Air Solenoid Valve Control Circuit
- DTC P0422/P0432 - TWC System Low Efficiency Bank 1 & Bank 2
- DTC P0440 - EVAP System
- DTC P0443 - EVAP Purge Valve Control
- DTC P0446 - EVAP Vent Valve Control
- DTC P0450 - EVAP Fuel Tank Pressure Sensor Circuit
- DTC P0455 - EVAP System Large Leak Detected
- DTC P0501 - Vehicle Speed Signal Circuit
- DTC P0505 - IAC Valve Circuit
- DTC P0506 - Idle Speed Low
- DTC P0507 - Idle Speed High
- DTC P0560 - System Voltage
- DTC P0601 - ECM Memory
- DTC P0602 - ECM Not Programmed
- DTC P0604 - ECM Ram
- DTC P1112 - Intake Plenum Switchover Valve Control
- DTC P1113 - Intake Resonance Switchover Valve Control
- DTC P1460 - Misfire Detected With Low Fuel
- DTC P1501 - Theft Deterrent System
- DTC P1502 - Theft Deterrent System No Password Received
- DTC P1503 - Theft Deterrent System Password Incorrect
- DTC P1564 - ECM Battery Voltage Loss
- DTC P1601 - ECM OVERTEMPERATURE
- DTC P1602 - Knock Sensor Module Circuit
- DTC P1700 - Mil Requested By TCM
- DTC P1701 - Mil Request Circuit
- DTC P1740 - Torque Management Request Circuits (Transmission Control)
- DTC P1740 - Torque Management Request Circuits (Traction Control)
Factory Service Tools
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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.