SCP Network Communication Failure U1085
The U1085 code indicates a communication fault on the SCP (J1850) network related to a powertrain status request. This means a control module on the network has sent or received invalid or incomplete data when requesting the current powertrain status. The SCP (Standard Corporate Protocol) network is a communication system primarily used by Ford, based on the SAE J1850 standard. The error is logged when the powertrain control module (PCM) or another related module cannot interpret the received data frame or does not receive a response within the expected time.
1. Commonly Affected Makes
2. Most Common Causes
- Short or open circuit in the SCP (J1850) bus wiring
- Poor electrical connections or corroded terminals at module connectors
- Damaged powertrain control module (PCM)
- Faulty SCP network module sending corrupt data
- Network termination resistor out of specification
- Power or ground issues in a network module
3. Symptoms You Will Notice
- Check Engine Light illuminated
- Drivability issues such as rough running, stalling, or reduced power
4. Step-by-Step Diagnosis
Scan for other related codes and freeze frame data
Inspect SCP bus wiring for shorts, opens, or damage
Check module connectors for corrosion or loose pins
Test network termination resistance (should be 120 ohms total)
Verify power and ground at each module on the SCP network
If wiring and connections are good, suspect a faulty PCM or other module
5. Frequently Asked Questions
Is it safe to drive?▼
The severity is medium. You may experience drivability issues, but it is generally safe to drive short distances to a repair shop. However, continued driving could lead to further problems.
How much does it cost to fix?▼
Diagnosis typically costs $100-$200. Repair costs vary widely: wiring repairs $100-$300, module replacement $200-$800+ depending on the module and labor.