The P067200 trouble code is an OBD-II diagnostic code that signifies a malfunction in the glow plug circuit for cylinder 2. This code is specific to diesel engines, where glow plugs are essential for preheating the combustion chamber to aid in starting the engine, especially in cold conditions. When the powertrain control module (PCM) detects an issue with the glow plug circuit, it triggers this code, indicating that the glow plug in cylinder 2 is not functioning correctly.
Understanding this code is crucial for vehicle owners and DIY mechanics as it can lead to significant issues such as hard starting, reduced engine performance, or even failure to start altogether. This article will provide comprehensive details on diagnosing and resolving the P067200 trouble code.
| P067200 Code Meaning | P067200 Code Common Causes |
|---|---|
| Cylinder 2 Glow Plug Circuit Malfunction | Faulty glow plug in cylinder 2 |
| Open or short circuit in wiring | Faulty glow plug control module |
| Poor electrical connections | Corroded or damaged connectors |
| Faulty PCM (rare) | Incorrect voltage supply to glow plugs |
Symptoms of P067200 Code
When dealing with the P067200 trouble code, several symptoms may manifest:
- Hard Starting: Difficulty starting the engine, particularly in cold weather.
- Reduced Power: Lack of power until the engine warms up completely.
- Illuminated Check Engine Light: The check engine light will typically illuminate on your dashboard.
- Engine Hesitation: Hesitation during acceleration due to improper combustion.
- Engine Misfire: A noticeable misfire can occur due to incomplete combustion from insufficient heat.
Technical Explanation
The P067200 code is related to the glow plug circuit of cylinder 2 in diesel engines. Glow plugs are designed to heat up and provide the necessary temperature for diesel fuel ignition during cold starts. If the PCM detects that the glow plug in cylinder 2 is not heating as expected, it will log this trouble code.
Glow Plug Functionality
Glow plugs operate by using electrical resistance to generate heat. When activated, they should reach a high temperature quickly to preheat the combustion chamber. If there’s a malfunction—whether due to a faulty glow plug, wiring issues, or control module failures—the engine may struggle to start or run inefficiently.
Step-by-Step Diagnosis
Diagnosing the P067200 code involves several steps:
- Check Engine Light: Confirm that the check engine light is illuminated and use an OBD-II scanner to retrieve the specific codes.
- Visual Inspection: Inspect the wiring and connectors leading to the glow plug for any signs of damage, corrosion, or loose connections.
- Test Glow Plug Resistance: Use a digital volt-ohmmeter (DVOM) to measure resistance across the glow plug. A healthy glow plug should typically show resistance between 0.5 and 2.0 ohms.
- Inspect Control Module: If the glow plug tests are within range, check the glow plug control module for proper operation and voltage output.
- Check Power Supply: Ensure that the power supply to the glow plugs is adequate and does not exceed manufacturer specifications by more than 10%.
- Clear Codes and Test Drive: After repairs or replacements, clear any stored codes and take the vehicle for a test drive to see if the P067200 code returns.
Solution Methods
To resolve issues related to the P067200 code, consider these methods:
- Replace Faulty Glow Plug: If testing reveals a defective glow plug, replace it with a new one that meets OEM specifications.
- Repair Wiring Issues: Address any damaged wiring or poor connections found during visual inspections by repairing or replacing them as necessary.
- Replace Control Module: If diagnostics indicate a malfunctioning glow plug control module, replace it according to manufacturer guidelines.
- Check PCM Functionality: In rare cases where all other components are functional but issues persist, consider having the PCM checked or recalibrated by a professional.
Cost Estimates
The costs associated with diagnosing and repairing a P067200 trouble code can vary widely based on location and vehicle make/model:
- Diagnostic Fee: $75 – $150 (for professional diagnosis)
- Glow Plug Replacement: $100 – $300 (depending on labor rates and parts)
- Wiring Repairs: $50 – $150 (depending on extent of damage)
- Control Module Replacement: $300 – $800 (including parts and labor)
Warnings and Recommendations
- Always ensure that any repairs are performed using parts that meet OEM specifications to maintain vehicle integrity.
- If you are not comfortable performing these diagnostics or repairs yourself, seek assistance from a qualified mechanic.
- Ignoring this trouble code can lead to further engine complications and increased repair costs over time.
Closing Paragraph
The P067200 trouble code indicates an important issue with your vehicle’s diesel engine’s ability to start efficiently in cold conditions. By understanding its symptoms, causes, and solutions, vehicle owners can take proactive steps towards diagnosing and fixing this problem effectively. Regular maintenance checks can help prevent such issues from arising in the future.
Frequently Asked Questions About P067200
- What does P067200 mean?
The P067200 code indicates a malfunction in the glow plug circuit for cylinder 2 in diesel engines. - What are common symptoms of this code?
Common symptoms include hard starting, reduced power during acceleration, illuminated check engine light, and engine misfires. - Can I drive my vehicle with this code?
While you may be able to drive your vehicle temporarily, it is advisable to address this issue promptly to avoid further damage. - How do I diagnose this trouble code?
Diagnosing involves checking for error codes with an OBD-II scanner, inspecting wiring and connectors, testing glow plugs’ resistance, and checking power supply. - Is it safe to replace a glow plug myself?
If you have mechanical experience and tools available, you may replace it yourself; otherwise, consult a professional mechanic. - What if replacing the glow plug doesn’t fix my problem?
If replacing the glow plug doesn’t resolve the issue, further diagnostics on wiring or control modules may be necessary. - How much does it cost to fix a P067200 code?
The cost can range from $75 for diagnostics up to $800 depending on required repairs. - When should I seek professional help?
If you are unsure about performing diagnostics or repairs yourself or if multiple components are involved, seek professional assistance.