Is there anything worse than having an error code flash a series of letters and numbers without knowing what they mean? A P068A error code in a Ford F150 relates to the Powertrain Control Module, and several factors can set off the code.
Keep reading for more information on this error code, its impact on your vehicle, and how to resolve the problem.
Contents
What Is Error P068A on Ford F150?
The P068A error code in a Ford F150 is related to the Powertrain Control Module (PCM) and indicates an issue with the PCM power relay de-energizing too soon. The PCM monitors sensors throughout the engine and transmission to ensure optimal performance while minimizing emissions.
The PCM relies on a dedicated power relay for its operation; if it fails or malfunctions, it may cause issues like those associated with the P068A code, leading to performance problems, including:
- Rough idling or stalling
- Poor fuel economy
- Difficulty starting the engine
- Illuminated check engine light or malfunction indicator lamp
If you’re experiencing any of these symptoms along with a P068A error code appearing on your dashboard display or OBD-II scanner, it’s essential to diagnose and resolve the problem promptly to prevent further damage to your vehicle.
Where Is the PCM Relay Located?
The PCM relay, also known as the Engine Control Module (ECM) relay, provides power to various components of your Ford F150’s engine, such as fuel injectors and ignition coils.
In most Ford F150 models, the PCM relay is located near the battery or firewall in the engine compartment fuse box on the driver’s side. To access it:
- Turn off your vehicle and ensure it is parked safely.
- Open your hood by pulling on its release lever inside your truck.
- Locate a black plastic cover labeled “Power Distribution Box.”
- Carefully remove this cover by pressing down on any retaining tabs and lifting.
Causes
A faulty transmission control module or wiring issue typically causes the P068A code, but other factors may be involved.
Faulty PCM Relay
A faulty PCM relay may not provide sufficient power to the PCM, causing it to de-energize prematurely and trigger the P068A code.
Damaged Wiring or Connectors
Damaged wiring or connectors in the electrical system can cause intermittent connections and voltage drops, leading to issues with the PCM relay function.
Weak Battery
A weak battery might not supply enough voltage to operate all vehicle systems, including the PCM relay. If your battery is old or has been drained recently, this could contribute to triggering a P068A code.
Corroded Ground Connections
Poor ground connections due to corrosion can lead to insufficient grounding of electrical components like relays and control modules.
Internal Faults Within the Powertrain Control Module (PCM)
In rare cases, internal faults within the Powertrain Control Module (PCM) itself may cause issues with its ability to properly control the relay, leading to a P068A code.
Aftermarket Accessories
Aftermarket accessories such as remote starters or alarm systems can sometimes interfere with your vehicle’s electrical system and cause issues like triggering a P068A code. If you’ve recently installed any aftermarket equipment, consider having it inspected for proper installation and compatibility with your Ford F150.
How To Fix
If you encounter the P068A error code on your Ford F150, there are several steps you can take to diagnose and potentially resolve the issue.
Inspect and Test the PCM Relay
Locate the relay in your vehicle and visually check for signs of damage or corrosion. You may also want to use a multimeter or test light to ensure power reaches both sides of the relay when activated.
Check Wiring and Connections
Inspect all wiring related to the PCM, including connectors, grounds, and harnesses. Look for signs of wear, damage, or corrosion that could impede proper electrical flow.
Resetting the Error Code
Sometimes, simply resetting the error code using an OBD-II scanner can resolve temporary issues related to voltage fluctuations or other transient problems with your vehicle’s electronic system.
Replace Faulty Components As Needed
If an inspection reveals damaged wires or connectors: repair them accordingly; If testing shows that your PCM relay has failed, it will need a replacement.
Seek Professional Assistance if Necessary
If the above steps have failed to resolve your P068A error code, you may need professional help from a mechanic with access to advanced diagnostic tools. They will have access to advanced diagnostic tools and expertise that can help pinpoint the root cause of your P068A error code.
Can You Drive With a P068A Code?
In most cases, the P068A code indicates an issue with the PCM relay circuit, which could affect various engine functions and performance. Driving with a P068A code is not recommended, as it could cause further damage to your vehicle.
A malfunctioning PCM relay can negatively impact your vehicle’s fuel management system, reducing gas mileage. The PCM also controls engine operation, so problems within the circuits may hinder overall performance.
When To See a Mechanic
While some causes and fixes can be addressed by vehicle owners themselves, other issues may require specialized knowledge and tools for proper diagnosis and repair. Consult a mechanic for the following issues.
Persistent Error Code
If the P068A code keeps coming back after attempting DIY fixes or clearing the code using an OBD-II scanner, this could indicate a more severe issue requiring expert attention.
Lack of Experience or Confidence
If you feel uncomfortable diagnosing or repairing your vehicle, it’s always best to seek assistance from a qualified mechanic with experience working with Ford vehicles.
Other Codes
In some cases, the appearance of additional diagnostic trouble codes (DTCs) alongside P068A might suggest more complex problems within your vehicle’s electrical system.
Voltage Issues Persist
If you’ve checked all possible sources for voltage irregularities but still encounter problems such as flickering lights or stalling engine while driving, consult an experienced technician.
Conclusion
A P068A error code on a Ford F150 signals a problem with the vehicle’s engine control module relay circuit. There are several causes and some fixes to address the issue, which should be addressed as soon as possible to avoid further vehicle damage.
