P068C - Powertrain Control Module (PCM) Power Input Signal Range/Performance Problem - Common in 2015-2018 Ford F-150 and 2016-2019 Chevrolet Silverado

Quick Answer

P068C means: The P068C code signifies a power input signal issue in the Powertrain Control Module (PCM), affecting vehicle performance.

Fix: Check and replace faulty components Cost: $50 - $150 Time: 90-180 minutes

Can I drive with P068C? Address this issue as soon as possible to prevent further engine problems.

Common Questions

What does P068C mean and how does it affect my car?

The P068C code signifies a problem with the power input signal to your vehicle's Powertrain Control Module (PCM). This can lead to various issues such as poor engine performance, a decrease in fuel efficiency, and even engine stalling. Addressing this code is crucial to ensure that your vehicle operates smoothly and reliably.

What are the most common causes of P068C and how much does it cost to fix?

Common causes include weak battery connections, damaged wiring, and faulty PCM. Repair costs can range from $50 for simple battery terminal cleaning to $1,200 for PCM replacement, depending on the severity of the issue.

Can I drive my car with P068C or should I stop immediately?

While you may be able to drive for a short time, it's not advisable to ignore the P068C code. Continuing to drive can lead to more severe engine issues, so it's best to address the problem as soon as possible.

How can I diagnose P068C myself using GeekOBD APP?

To diagnose P068C, connect the GeekOBD APP to your vehicle's OBD2 port. Use the app to retrieve trouble codes and freeze frame data. Pay attention to voltage readings and inspect wiring connections to identify potential faults.

What vehicles are most commonly affected by P068C?

P068C is commonly seen in vehicles such as the 2015-2018 Ford F-150 and the 2016-2019 Chevrolet Silverado, among others. Be sure to check for any recalls or Technical Service Bulletins (TSBs) related to electrical issues in your vehicle model.

How can I prevent P068C from happening again?

Regular maintenance is key! Ensure battery terminals are clean and connections are tight. Inspect wiring for damage periodically and replace any worn components to avoid future electrical issues that can trigger the P068C code.

What is P068C?

The DTC P068C code indicates that the Powertrain Control Module (PCM) has detected a problem with the power input signal. This code typically arises when the PCM is unable to receive a proper voltage signal from the power supply, which can lead to various engine performance issues. In simpler terms, if your vehicle's PCM is not getting the correct electrical input, it can cause malfunctions in engine operation, transmission shifting, and overall vehicle performance. This code often appears in models like the 2015-2018 Ford F-150 and 2016-2019 Chevrolet Silverado, where electrical issues are more prevalent due to the complex systems involved. Ignoring this code can lead to more severe problems, including reduced fuel efficiency and potential engine stalling. Therefore, understanding and addressing the P068C code promptly is essential for maintaining your vehicle's performance and reliability.

System: P - Powertrain (Engine, Transmission, Emissions)

Symptoms

Common symptoms when P068C is present:

  • Check engine light stays on constantly, indicating a persistent issue with the PCM.
  • Engine hesitates during acceleration, which can feel like a loss of power when merging or overtaking.
  • Fuel economy decreased by 10-15%, making your vehicle less efficient and costing more to drive.
  • Random stalling or misfires, especially during idle or low-speed operations, which can be alarming.
  • Difficulty starting the vehicle, often resulting in multiple attempts before the engine turns over.

Possible Causes

Most common causes of P068C (ordered by frequency):

  1. The most common cause is a weak or faulty battery connection (60% likelihood). Ensure that battery terminals are clean and tight, as a poor connection can disrupt power supply.
  2. A damaged or corroded wiring harness can lead to improper signal transmission, affecting the PCM (25% likelihood). Inspect the wiring for visual damage or wear.
  3. Issues with specific fuses related to the PCM can trigger this code, often preventable by regularly checking fuse integrity.
  4. Less common causes include a defective PCM itself, which may require replacement or reprogramming.
  5. Rarely, environmental factors such as extreme temperatures can affect electrical connections and lead to intermittent P068C codes.

P068C Repair Costs

Cost Breakdown by Repair Type

Battery & Connection Repair

Cleaning or replacing corroded battery terminals and connections.

  • Total: $50 - $150
  • Success rate: 80%
Wiring Harness Repair

Repairing or replacing damaged wiring harness.

  • Total: $100 - $300
  • Success rate: 70%
PCM Replacement

Replacing the faulty Powertrain Control Module.

  • Total: $500 - $1,200
  • Success rate: 90%
Money-Saving Tips for P068C
  • Start with the most common and least expensive repairs first
  • Use GeekOBD APP to confirm diagnosis before replacing expensive parts
  • Consider preventive maintenance to avoid future occurrences
  • Compare prices for OEM vs aftermarket parts based on your needs
  • Address the issue promptly to prevent more expensive secondary damage

Diagnostic Steps

Professional P068C Diagnosis Process

Follow these systematic steps to accurately diagnose P068C. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes)

Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 2: Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes)

Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 3: Step 3: Component testing - Use a multimeter to check voltage at the PCM input (20-30 minutes)

Step 3: Component testing - Use a multimeter to check voltage at the PCM input (20-30 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 4: Step 4: System function test - Verify proper operation after repairs and clear codes with GeekOBD (10-15 minutes)

Step 4: System function test - Verify proper operation after repairs and clear codes with GeekOBD (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success (15-20 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.

Important Notes

  • Always verify the repair with GeekOBD APP after completing diagnostic steps
  • Clear codes and test drive to ensure the problem is resolved
  • Address underlying causes to prevent code recurrence

Real Repair Case Studies

Case Study 1: 2017 Ford F-150 PCM Power Input Issue

Vehicle: 2017 Ford F-150, 75,000 miles

Problem: Customer reported engine hesitation and check engine light illuminated.

Diagnosis: Initial scan revealed P068C code. Visual inspection showed corroded battery terminals.

Solution: Cleaned battery terminals and tightened connections. Cleared codes and verified operation.

Cost: $75 (cleaning and inspection)

Result: Customer reported improved performance and no recurrence of issues.

Case Study 2: 2016 Chevrolet Silverado Wiring Harness Repair

Vehicle: 2016 Chevrolet Silverado, 50,000 miles

Problem: Vehicle experienced intermittent stalling and check engine light.

Diagnosis: OBD2 scan showed P068C code. Found damaged wiring harness affecting signal to PCM.

Solution: Replaced damaged wiring harness and reconnected PCM properly.

Cost: $250 (parts and labor)

Result: Stalling issue resolved, and vehicle performed flawlessly post-repair.

Diagnose P068C

Use GeekOBD APP for professional diagnosis!

  • Real-time data monitoring
  • Advanced diagnostic features
  • Step-by-step repair guidance
  • Professional-grade analysis
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Code Information

Code: P068C
System: Powertrain (Engine, Transmission, Emissions)
Severity: HIGH
Category: Engine Codes