U1037 SCP Bus Communication Failure
The U1037 code indicates that a control module has detected faulty communication or missing data on the SCP (Standard Corporate Protocol) J1850 bus, specifically related to wheel speed information. This protocol is primarily used by Ford Motor Company. The code sets when a module requiring wheel speed, RPM, or ABS data does not receive the expected signal from the source module (typically the ABS or traction control module). Loss of valid data can affect systems such as traction control, vehicle stability control (VSC), or brake assist.
1. Commonly Affected Makes
2. Most Common Causes
- Faulty ABS or traction control module
- Open, shorted, or high-resistance wiring in the SCP (J1850) bus
- Corroded or loose connectors in the SCP communication circuit
- Internal failure in the receiving module (PCM, instrument cluster, etc.)
- Electrical interference affecting signal integrity on the SCP bus
- Voltage or resistance variation in the SCP bus terminators
3. Symptoms You Will Notice
- Illuminated check engine light or ABS warning light
- Malfunctioning traction control, stability control, or brake assist
4. Step-by-Step Diagnosis
Scan for all stored codes and freeze frame data
Inspect SCP bus wiring and connectors for damage, corrosion, or looseness
Test bus resistance and voltage at the diagnostic link connector
Check for communication between modules using a scan tool
Isolate the faulty module by disconnecting modules one at a time
5. Frequently Asked Questions
Is it safe to drive?▼
The vehicle may be driven, but systems like traction control and stability control may not function properly. Have it diagnosed soon to avoid safety risks.
How much does it cost to fix?▼
Repair costs typically range from $100 to $800, depending on whether the issue is wiring ($100-$300) or a module replacement ($400-$800).