Troubleshooting Code P067E – Cylinder 6 Glow Plug Control Circuit Low
One of the most critical parameters that cars nowadays are equipped with is the On-Board Diagnostics II (OBD-II) system. It has transformed the way we diagnose problems with our cars, making it easier and faster. Any modern car owner knows the value of this system as it enables one to promptly identify any problem identified in the car’s engine. One of the most recurring OBD-II codes is P067E.
This article aims to demystify the P067E code by answering the following questions:
• What is the P067E Code?
• What is the Function of the Glow Plug Control Circuit?
• What are the Symptoms of Code P067E?
• What Causes Code P067E?
• What is the Solution to P067E Code?
What is Code P067E?
P067E refers to the Cylinder 6 Glow Plug Control Circuit Low. A malfunction of this control circuit sends a signal to the OBD-II system, which then triggers this code. Typically, the Glow Plug Control Module triggers a reduction in voltage supply upon detecting a fault with the glow plug circuit. The circuit is designed in such a way that a reduced voltage is supplied to the plugs if the system detects that the plugs are overheating.
However, if the Glow Plug Control Circuit detects low voltage supply to Cylinder 6, the OBD-II system triggers the P067E code. Typically, this occurs in diesel engines and in the colder months when there is more demand on the glow plug system.
What is the Function of the Glow Plug Control Circuit?
The Glow Plug Control Circuit ensures a smooth start of diesel engines during cold weather. It does this by warming up the air entering the combustion chamber, thereby making it easier to ignite the fuel. Once the engine is started, the glow plug switches off to prevent them from overheating. In short, the Glow Plug Control Circuit saves time and energy when starting a diesel engine in cold weather.
What are the Symptoms of Code P067E?
Several symptoms could indicate a P067E code present in a vehicle. These range from visible to operational symptoms. Some of the most common indicators are:
1. Check Engine Light (CEL): This light illuminates to warn drivers of any engine-related problems. Often, it is the number one warning sign for any engine problems.
2. Misfire: Misfires can occur in the engine where an imbalance in the fuel and air mix could lead to the engine running inadequately.
3. Hard Starting: The vehicle will have difficulty starting in cold weather.
4. Rough Idling: One of the more severe symptoms of a P067E code problem is rough idling. The car engine vibrates significantly, and the occupants can feel the shaking.
What Causes Code P067E?
Code P067E arises from various factors, including:
1. Glow Plug Failure: As with any other device, the glow plugs experience wear and tear over time. Regular maintenance is essential to ensure that the glow plug remains functional.
2. Electrical Problems: The Glow Plug Control Relay is an electronic component that connects the power source to the glow plugs. Electrical problems with this device can cause the glow plugs to fail.
3. Wiring and Connections: Broken or corroded wires and connections leading from the Glow Plug Control Circuit may also trigger the code P067E.
4. Control Module Failure: As with electrical components, the control module that regulates the Glow Plug Control Circuit may fail or malfunction over time.
What is the Solution to P067E Code?
The first thing to do when the check engine light is illuminated is to conduct a diagnostic test on the OBD-II system. Once the test has been conducted, it will reveal the exact fault that is leading to the code being triggered. After identifying the problem, the mechanic will take the necessary steps to correct it.
These include:
1. Replacing the Glow Plug(s): If the diagnosis confirms that the glow plug(s) are faulty, the mechanic will remove them and replace them with new ones.
2. Checking the Wiring: Corrosion or damaged wiring leading to the Glow Plug Control Circuit may cause the P067E code warning. Thus, any broken or corroded connections need to be repaired.
3. Checking the Relay: The Glow Plug Control Relay is an electronic component that powers the Glow Plug Control Circuit. Thus, it is essential to check this device, and if it is faulty, replace it.
4. Checking the Control Module: If the issue is not corrected by performing the first three steps, the mechanic must then check the Glow Plug Control Module that manages the circuit. If it is found to be faulty, it has to be replaced to fix the code P067E.
FAQs
1. Why does the Glow Plug Control Circuit fail?
Glow Plug Control Circuit failure could be due to corroded or damaged wiring, faulty Glow Plug Control Relay, or Control Module-Failure.
2. What are the effects of driving with a P067E code?
Suppose you drive with a malfunctioning Glow Plug Control Circuit, and the engine struggles to start, increasing resistance in the battery, leading to an eventual battery drain.
3. Can I continue to use my car if the P067E code is triggered?
It is advised not to drive your car in such an event as persistent misuse may lead to severe damage to your engine.
4. How was it possible to identify problems in the engine before OBD-II systems?
Problem indications before OBD-II included a reduction in fuel economy, poor performance, and poor emissions.
5. How is the OBD-II system beneficial to a driver?
The OBD-II system detects malfunctions in the engine and alerts the driver via illuminating the check engine light, making it easier to identify issues in the early stages, making it easier to maintain their car.
In conclusion, as a diesel engine owner experiencing difficulties with starting their vehicle during cold weather, it is vital to seek immediate assistance from your local mechanic. The P067E code could signal several issues, including Glow Plug failure or electrical problems with the relay or wiring. However, regular preventative maintenance checks can alleviate these issues before the check engine light comes on, ensuring the vehicle battery remains healthy and does not drain. As always, investing in preventative maintenance ultimately prolongs the life of your vehicle going forward.
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