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.
2004 Ford ThunderbirdFACTORY OEM SERVICE PROCEDURE
Communication System DTCS (U Codes)
COMMUNICATION SYSTEM DIAGNOSTIC TROUBLE CODE CHART
| DTC | Description | Source | Action |
|---|---|---|---|
| U1009 | SCP (J1850) Invalid or Missing Data for Engine Torque | ABS Module | CARRY OUT the PCM self-test. For any engine related DTCs, REFER to INTRODUCTION - CNG, FLEX-FUEL & GASOLINE . If no engine DTCs, Go to PINPOINT TEST K: NO INTERNATIONAL STANDARDS ORGANIZATION (ISO) 9141 NETWORK COMMUNICATION |
| U1027 | SCP (J1850) Invalid or Missing Data for Engine RPM | ABS | CARRY OUT the PCM self-test. For any engine related DTCs, REFER to INTRODUCTION - CNG, FLEX-FUEL & GASOLINE . If no engine related DTCs, Go to PINPOINT TEST J: NO POWERTRAIN CONTROL MODULE (PCM) STANDARD CORPORATE PROTOCOL (SCP) NETWORK COMMUNICATION . |
| U1041 | SCP (J1850) Invalid or Missing Data for Vehicle Speed | Instrument Cluster | CARRY OUT the ABS Module self-test. |
| U1059 | SCP (J1850) Invalid or Missing Data for Transmission/Transaxle/PRNDL | ABS | CARRY OUT the PCM self-test. For any transmission related DTCs, REFER to AUTOMATIC TRANSMISSION - 5R55S . If no transmission related DTCs, Go to PINPOINT TEST J: NO POWERTRAIN CONTROL MODULE (PCM) STANDARD CORPORATE PROTOCOL (SCP) NETWORK COMMUNICATION . |
| U1073 | SCP (J1850) Invalid or Missing Data for Engine Coolant | Instrument Cluster | CARRY OUT the PCM self-test. For any engine coolant temperature (ECT) related DTCs, REFER to INTRODUCTION - CNG, FLEX-FUEL & GASOLINE . If no ECT DTCs, Go to PINPOINT TEST J: NO POWERTRAIN CONTROL MODULE (PCM) STANDARD CORPORATE PROTOCOL (SCP) NETWORK COMMUNICATION . |
| U1123 | SCP (J1850) Invalid or Missing Data for Odometer | Instrument Cluster | CARRY OUT the ABS Module self-test. |
| U1147 | SCP (J1850) Invalid or Missing Data for Vehicle Security | Instrument Cluster | CHECK the PCM calibration. REFER to INTRODUCTION - CNG, FLEX-FUEL & GASOLINE . If PCM calibration is correct, Go to PINPOINT TEST J: NO POWERTRAIN CONTROL MODULE (PCM) STANDARD CORPORATE PROTOCOL (SCP) NETWORK COMMUNICATION . |
| U1262 | SCP (J1850) Communication Bus Fault | Instrument Cluster | REFER to COMMUNICATIONS NETWORK . |
| U1262 | SCP (J1850) Communication Bus Fault | ABS Module | REFER to COMMUNICATIONS NETWORK . |
| U2017 | Driver Side Crash Sensor Communications Fault | RCM | REFER to AIR BAG RESTRAINT SYSTEMS . |
| U2018 | Driver Side Crash Sensor Communications Fault | RCM | REFER to AIR BAG RESTRAINT SYSTEMS . |
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.