Quick Answer
P067B means: P067B signals a problem with the glow plug circuit, affecting diesel engine starting.
Can I drive with P067B? You should not drive your vehicle until this issue is diagnosed and repaired, as it can lead to starting problems and engine damage.
Common Questions
What does P067B mean and how does it affect my car?
The P067B code indicates a fault in the glow plug circuit, crucial for starting diesel engines. If this issue is not addressed, you may face hard starting, increased emissions, and potentially severe engine damage over time.
What are the most common causes of P067B and how much does it cost to fix?
Common causes include faulty glow plugs, damaged wiring, or a malfunctioning glow plug relay. Repair costs can vary, with glow plug replacement averaging between $200 and $600, depending on the vehicle and parts needed.
Can I drive my car with P067B or should I stop immediately?
It's not advisable to drive your vehicle with the P067B code active. Doing so may result in starting problems, increased wear on the engine, and overall performance issues.
How can I diagnose P067B myself using GeekOBD APP?
Using the GeekOBD APP, connect your OBD2 scanner to retrieve codes and freeze frame data. The app will also help you monitor live data from the glow plug circuit, allowing you to identify potential faults.
What vehicles are most commonly affected by P067B?
Commonly affected vehicles include 2011-2016 Ford Super Duty trucks and 2010-2015 Jeep Grand Cherokees, among others. Always check for manufacturer recalls or Technical Service Bulletins (TSBs) related to this code.
How can I prevent P067B from happening again?
To prevent recurrence, perform regular maintenance checks on your vehicle's electrical system, especially the glow plug circuit. Keeping the engine clean and ensuring proper battery health can also help.
What is P067B?
The diagnostic trouble code (DTC) P067B indicates that there is an issue with the glow plug circuit in your vehicle. Glow plugs are crucial for starting diesel engines, especially in colder temperatures. When the engine control module (ECM) detects that the resistance of the glow plug circuit is lower than expected, it triggers this code. The low resistance could be due to a short in the wiring, a faulty glow plug, or issues within the glow plug relay. This can lead to hard starting, increased emissions, and poor engine performance. If left unresolved, you may experience difficulty starting your vehicle, especially in cold weather, and potentially damage other engine components over time. It is essential to address this code promptly to maintain optimal engine function and avoid more costly repairs down the line. Regular diagnostics with tools like the GeekOBD APP can help you identify issues early, ensuring your vehicle runs smoothly and efficiently.
System: P - Powertrain (Engine, Transmission, Emissions)
Symptoms
Common symptoms when P067B is present:
- Check engine light stays on constantly, indicating a persistent fault that needs attention.
- Engine hesitates during acceleration, which can feel like a loss of power or stalling, especially when trying to speed up.
- Fuel economy decreased by 10-15%, which can significantly impact your budget over time as fuel costs rise.
- Difficulty starting the engine in cold weather, which may require multiple attempts, increasing wear on the starter.
- Excessive white smoke from the exhaust during startup, a sign that fuel is not burning properly due to poor glow plug performance.
Possible Causes
Most common causes of P067B (ordered by frequency):
- The most common cause is a faulty glow plug, which has a likelihood of 60%. Glow plugs can wear out over time and need replacement to ensure proper engine function.
- Another frequent cause is damaged wiring or a short circuit in the glow plug harness. This can lead to poor electrical connection and trigger the P067B code.
- A malfunctioning glow plug relay can also cause this code, preventing the glow plugs from receiving the necessary power to operate. Regular checks can help identify this early.
- Less common but serious is a failure within the engine control module (ECM). This could lead to multiple DTCs and requires professional diagnostics to address.
- A rare cause could be a bad fuel injector, which can affect combustion efficiency and mimic symptoms of a glow plug issue.
P067B Repair Costs
Cost Breakdown by Repair Type
Glow Plug Replacement
Replacing faulty glow plugs to restore proper engine starting function.
- Total: $200 - $600
- Success rate: 85%
Glow Plug Relay Replacement
Replacing a malfunctioning glow plug relay to ensure proper power delivery.
- Total: $100 - $300
- Success rate: 80%
Wiring Repair
Fixing damaged wiring or connections in the glow plug circuit.
- Total: $50 - $200
- Success rate: 75%
Money-Saving Tips for P067B
- 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 P067B Diagnosis Process
Follow these systematic steps to accurately diagnose P067B. 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).
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).
Step 3: Step 3: Component testing - Use a multimeter to test glow plugs and the relay for proper operation (20-30 minutes)
Step 3: Component testing - Use a multimeter to test glow plugs and the relay for proper operation (20-30 minutes).
Step 4: Step 4: System function test - Verify proper operation after repairs and clear codes (10-15 minutes)
Step 4: System function test - Verify proper operation after repairs and clear codes (10-15 minutes).
Step 5: Step 5: Road test verification - Drive vehicle under various conditions to confirm repair success (15-20 minutes)
Step 5: Road test verification - Drive vehicle under various conditions to confirm repair success (15-20 minutes).
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: Glow Plug Replacement on 2014 Ford Super Duty
Vehicle: 2014 Ford F-250 Super Duty, 85,000 miles
Problem: Customer reported hard starting issues, especially in cold weather.
Diagnosis: Initial scan revealed P067B. Visual inspection showed corrosion on wiring and a faulty glow plug.
Solution: Replaced all glow plugs and repaired the wiring harness.
Cost: $450 (parts: $300, labor: $150)
Result: Customer reported improved starting performance and no more check engine light.
Case Study 2: Wiring Repair on 2011 Jeep Grand Cherokee
Vehicle: 2011 Jeep Grand Cherokee, 95,000 miles
Problem: Engine hesitated during acceleration and check engine light was on.
Diagnosis: Diagnostic scan indicated P067B due to damaged wiring.
Solution: Repaired the wiring harness and replaced the glow plug relay.
Cost: $250 (parts: $150, labor: $100)
Result: Vehicle performance restored, and customer satisfied with the quick turnaround.