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 MANUALSCADILLAC1994DEVILLE CONCOURS V8-4.6L VIN 9REPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )
1994 Cadillac DeVille Concours V8-4.6L VIN 9
A L L Diagnostic Trouble Codes ( DTC )
1994 Cadillac DeVille Concours V8-4.6L VIN 9SECTION A L L Diagnostic Trouble Codes ( DTC )
Testing and Inspection- Diagnostic Trouble Code Descriptions
- Air Conditioning Programer (ACP)
- Antilock Brake System (ABS)
- Antilock Brake System /Traction Control (ABS/TCS)
- Heating Ventilation Air Conditioning (HVAC)
- I Code Description
- Information Bus
- Powertrain Control Module (PCM)
- Road Sensing Suspension (RSS)
- Road Sensing Suspension (RSS/RTD)
- SIR - Air Bag Systems
- Supplemental Inflatable Restraint (SIR)
- Trouble Code Description - Instrument Panel
- Trouble Code Description - Lighting and Horns
- 4T80-E Automatic Transaxle
- P Code Charts
- P012
- P013
- P014
- P015
- P016
- P017
- P019
- P020
- P021
- P022
- P023
- P024
- P025
- P026
- P027
- P028
- P029
- P030
- P031
- P032
- P033
- P034
- P035
- P036
- P037
- P038
- P039
- P040
- P041
- P042
- P043
- P044
- P045
- P046
- P047
- P048
- P051
- P052
- P053
- P055
- P056
- P057
- P058
- P059
- P060
- P061
- P062
- P063
- P064
- P065
- P066
- P067
- P068
- P069
- P070
- P071
- P073
- P074
- P075
- P076
- P080
- P081
- P083
- P085
- P086
- P088
- P089
- P090
- P091
- P092
- P093
- P094
- P095
- P096
- P097
- P099
- P102
- P103
- P105
- P106
- P107
- P108
- P109
- P110
- P112
- P117
- P119
- P131
- P132
- P137
- Manufacturer Code Charts
- Related Tests, Information and Procedures
- Chart 1 Powertrain System Check
- Chart 2 PCM Power and Ground Check
- Chart 3 Powertrain Ground Check
- Chart 4 Service Engine Soon MIL Inoperative
- Chart 5 Service Engine Soon MIL On, No PCM Codes Set
- Chart 6 Multiple PCM Codes
- Chart 6C-1 Fuel System Check
- Chart 6C-2 Fuel Pressure Check
- Chart 6C-3 Injector Flow/Voltage Drop Check
- Chart 6C-4 Power Balance Check
- Chart 6C-5 Fuel Leak/Odor Check
- Chart 6C-6 Idle Speed Control (ISC) Check
- Chart 6D4-1 Ignition System Check
- Chart 6D4-2 Detonation Check
- Chart 6D4-3 Ignition Control Check
- Chart 6D4-4 Secondary Ignition Check
- Chart 6EC-1 EGR System Check
- Chart 7 Rear Oxygen Sensor Diagnosis
- Chart 8 Front Oxygen Sensor Diagnosis
- Diagnostic Trouble Code Descriptions
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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.