P068B - Understanding P068B Code in Dodge Ram, Jeep Cherokee, and Other Models

Quick Answer

P068B means: P068B indicates a malfunction in the ignition relay control circuit within the Engine Control Module.

Fix: Check and replace faulty components Cost: $100 - $250 Time: 90-180 minutes

Can I drive with P068B? Immediate attention is recommended to avoid severe engine issues.

Common Questions

What does P068B mean and how does it affect my car?

The P068B code signals a malfunction in the ignition relay control circuit of the ECM, which can lead to starting issues, poor engine performance, and even complete engine failure if not addressed. It’s crucial to diagnose and repair this code quickly to maintain your vehicle's reliability.

What are the most common causes of P068B and how much does it cost to fix?

Common causes include a faulty ignition relay, poor electrical connections, or a malfunctioning ECM. Repair costs can vary, with ignition relay replacements costing around $100 to $250, while ECM replacements can range from $500 to $1,500.

Can I drive my car with P068B or should I stop immediately?

Driving with the P068B code can be risky. If you experience symptoms like difficulty starting or engine hesitation, it’s best to stop and diagnose the issue. Continuing to drive may lead to more severe engine problems.

How can I diagnose P068B myself using GeekOBD APP?

To diagnose P068B, connect the GeekOBD APP to your vehicle’s OBD2 port. Run a full scan to retrieve codes and freeze frame data, which will help identify the context of the issue. Check the wiring and ignition relay using the app's diagnostic features.

What vehicles are most commonly affected by P068B?

Commonly affected vehicles include the 2015-2018 Dodge Ram, Jeep Cherokee, and Chrysler 300. Be sure to check for any recalls or Technical Service Bulletins (TSBs) associated with these models for further guidance.

How can I prevent P068B from happening again?

Regular maintenance, such as checking electrical connections and updating your vehicle's software, can help prevent P068B. Additionally, using quality parts when repairs are needed is essential to maintaining the reliability of your ignition system.

What is P068B?

The P068B code is a diagnostic trouble code (DTC) that relates to the Engine Control Module (ECM) and the power management system of your vehicle. This code indicates a problem with the ignition relay control circuit in the ECM, which can lead to various issues affecting vehicle performance. When the P068B code is triggered, it usually signifies that the ECM is not receiving the proper voltage or signals necessary to operate correctly. This can lead to symptoms such as the check engine light illuminating, difficulty starting the vehicle, or even complete engine failure in severe cases. It's crucial to address this issue promptly, as ignoring it may lead to more significant mechanical failures and costly repairs. Common vehicles affected by this code include models from Dodge, Jeep, and Chrysler, particularly those manufactured between 2015 and 2018. Diagnosing and fixing the P068B code often involves inspecting the wiring, relays, and the ECM itself to ensure everything is functioning as it should. If you’re experiencing issues like the check engine light or erratic engine behavior, it may be a good idea to investigate this code further.

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

Symptoms

Common symptoms when P068B is present:

  • The check engine light illuminates and stays on, indicating a fault detected by the vehicle’s onboard diagnostic system.
  • The engine may hesitate during acceleration, making driving feel less smooth and potentially dangerous.
  • Fuel economy may decrease significantly, often by 10-15%, due to inefficient engine operation caused by the code.
  • There may be difficulty starting the engine, which can leave you stranded if the issue is not addressed.
  • You might notice electrical issues, such as dashboard lights flickering or power windows behaving erratically.

Possible Causes

Most common causes of P068B (ordered by frequency):

  1. A faulty ignition relay is the most common cause of the P068B code, accounting for approximately 40% of cases. This relay may fail, preventing the ECM from receiving the necessary signals.
  2. Poor electrical connections, such as corroded wires or loose connectors, can also trigger this code. It's critical to inspect and clean connections to ensure a good flow of electricity.
  3. The ECM itself may be malfunctioning. While this is less common, if there is no other apparent issue, the ECM may require testing or replacement.
  4. In rare instances, a blown fuse in the ignition circuit could lead to this code. Regularly checking fuses as part of vehicle maintenance can help prevent such issues.
  5. Finally, software issues in the ECM may lead to false triggering of the P068B code. Keeping your vehicle’s software updated can mitigate this risk.

P068B Repair Costs

Cost Breakdown by Repair Type

Ignition Relay Replacement

Replacing the faulty ignition relay can resolve the P068B code effectively.

  • Total: $100 - $250
  • Success rate: 85%
ECM Replacement

In cases where the ECM is defective, replacement may be necessary.

  • Total: $500 - $1,500
  • Success rate: 90%
Money-Saving Tips for P068B
  • 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 P068B Diagnosis Process

Follow these systematic steps to accurately diagnose P068B. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Perform an initial visual inspection, checking for damaged wiring, loose connections, or signs of corrosion around the ECM and ignition relay (5-10 minutes)

Step 1: Perform an initial visual inspection, checking for damaged wiring, loose connections, or signs of corrosion around the ECM and ignition relay (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: Use the GeekOBD APP to conduct an OBD2 scan, retrieving all codes and freeze frame data to understand the context of the fault (10-15 minutes)

Step 2: Use the GeekOBD APP to conduct an OBD2 scan, retrieving all codes and freeze frame data to understand the context of the fault (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: Conduct component testing, using a multimeter to check voltage at the ignition relay and ECM (20-30 minutes)

Step 3: Conduct component testing, using a multimeter to check voltage at the ignition relay and ECM (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: After repairs, conduct a system function test to verify everything is operating correctly and clear any stored codes (10-15 minutes)

Step 4: After repairs, conduct a system function test to verify everything is operating correctly and clear any stored codes (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: Perform a road test under various driving conditions to confirm that the issue is resolved and no new codes appear (15-20 minutes)

Step 5: Perform a road test under various driving conditions to confirm that the issue is resolved and no new codes appear (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: Dodge Ram 1500 Ignition Relay Failure

Vehicle: 2016 Dodge Ram 1500, 75,000 miles

Problem: Customer reported intermittent starting issues andCheck Engine Light illumination.

Diagnosis: Upon scanning with GeekOBD APP, P068B code was present. A visual inspection revealed a corroded ignition relay.

Solution: Replaced the ignition relay, performed a system function test, and cleared the codes.

Cost: $150 (parts and labor included)

Result: The customer reported that the vehicle started reliably, and the Check Engine Light remained off.

Case Study 2: Jeep Cherokee ECM Replacement

Vehicle: 2017 Jeep Cherokee, 60,000 miles

Problem: Vehicle would not start, and the Check Engine Light was on.

Diagnosis: GeekOBD APP revealed P068B. Testing confirmed that the ECM was not receiving power due to internal failure.

Solution: Replaced the ECM with a new unit and reprogrammed it for the specific vehicle.

Cost: $1,200 (including programming)

Result: Vehicle started immediately after installation, and all functionality returned.

Diagnose P068B

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: P068B
System: Powertrain (Engine, Transmission, Emissions)
Severity: HIGH
Category: Engine Codes