A Ford P068a diagnostic trouble code (DTC) indicates an issue with the Engine Control Module/Powertrain Control Module (ECM/PCM) power relay. This article discusses the possible causes of a P068A code in a Ford vehicle, specifically relating to a 2015 Focus ST3, and explores potential solutions. We’ll examine a real-world scenario involving a recent battery replacement and a potentially compromised electrical connection.
Understanding the P068A Code
The P068A code signifies that the ECM/PCM power relay has de-energized prematurely. This can lead to a sudden loss of engine power, similar to the symptoms of traction control activation. The ECM/PCM controls vital engine functions, and its unexpected shutdown can cause significant drivability issues. A loose connection, a faulty relay, or damage to the wiring harness can trigger this code.
Case Study: 2015 Ford Focus ST3
A 2015 Ford Focus ST3 owner experienced intermittent engine cutouts after driving over bumps. The issue was accompanied by a P068A code. Prior to the problem, the owner had installed a larger battery, requiring disconnection of a significant electrical connector within the engine bay fuse box. The reconnection process was initially problematic, raising concerns about a damaged connector or bent pins.
Potential Causes and Troubleshooting
Several factors can contribute to a P068A code:
- Faulty ECM/PCM Power Relay: The relay itself might be malfunctioning, failing to provide consistent power to the ECM/PCM. Replacing the relay is a relatively simple and inexpensive fix.
- Loose or Damaged Wiring: A loose connection at the relay, a damaged wire within the harness, or corrosion can disrupt the power supply. Thoroughly inspecting the wiring and connections is crucial.
- Low Battery Voltage: While a new battery was installed in this case, it’s essential to verify its voltage and ensure proper charging system operation. A weak battery or faulty alternator can lead to voltage drops, triggering the P068A code.
- Damaged Connector: The difficulty encountered during the battery installation raises concerns about potential damage to the large connector within the fuse box. Bent pins or a compromised connection can disrupt power flow. Careful inspection and potentially replacement of the connector may be necessary.
Is the Battery Installation Related?
The timing of the P068A code appearing after the battery installation suggests a possible correlation. While disconnecting and reconnecting electrical connectors is a common practice, it’s crucial to exercise caution. The owner’s description of the difficult reconnection process highlights the potential for damage. A misaligned connector or forced connection can bend pins or create a poor electrical contact, leading to intermittent power loss.
Locating the ECM/PCM Power Relay
The ECM/PCM power relay is typically located in the engine bay fuse box, often near the battery. Consulting the vehicle’s owner’s manual or repair manual can provide precise location information for the 2015 Ford Focus ST3.
Next Steps and Recommendations
Given the potential seriousness of a P068A code and its impact on drivability, professional diagnosis is recommended. A qualified technician can pinpoint the exact cause using specialized diagnostic equipment. They can verify the integrity of the wiring, test the relay, and inspect the connector for damage. Addressing the issue promptly can prevent further damage and ensure safe vehicle operation.
