The P066E: Cylinder 3 Glow Plug Control Circuit Low code refers to a low voltage issue in the glow plug control circuit for cylinder 3. This low voltage condition can prevent the glow plug from reaching the required temperature to assist in starting the engine, especially in cold weather. Common causes include a faulty glow plug, wiring issues, or problems within the control circuit.
P066E – Quick Overview
| Code | Information |
|---|---|
| Meaning | P066E: Cylinder 3 Glow Plug Control Circuit Low |
| Is it serious? | Yes, as it can result in hard starting, especially in cold conditions. |
| Possible causes | – Low voltage in the cylinder 3 glow plug control circuit – Faulty glow plug – Wiring issue |
| How to diagnose? | – Test cylinder 3 glow plug control circuit for voltage – Inspect wiring and connectors – Replace glow plug if necessary |
P066E Meaning
The P066E code indicates that the voltage in the control circuit for cylinder 3’s glow plug is lower than expected. This can prevent the glow plug from heating properly, making it difficult for the engine to start, particularly in cold weather. Ensuring the glow plug and its control circuit are functioning correctly is essential for reliable engine operation.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for additional related codes, especially those affecting the glow plug system or electrical faults. | OBD-II Scanner |
| Test the Cylinder 3 Glow Plug Control Circuit for Voltage | Use a multimeter to measure the voltage in the glow plug control circuit for cylinder 3. Ensure that the voltage meets the manufacturer’s specifications. | Multimeter |
| Inspect Wiring and Connectors | Inspect the wiring and connectors leading to the cylinder 3 glow plug for any signs of damage, corrosion, or loose connections that could cause low voltage. | Flashlight, Multimeter |
| Test the Glow Plug for Cylinder 3 | Test the glow plug in cylinder 3 to ensure it is working correctly and not damaged. Replace the glow plug if necessary. | Diagnostic Tool, Multimeter |
| Replace the Glow Plug if Necessary | If the glow plug for cylinder 3 is found to be faulty or underperforming, replace it to ensure proper engine starting performance. | Replacement Glow Plug, Tools |
| Clear the Code and Test | After completing repairs, clear the code using an OBD-II scanner and test the vehicle to ensure the cylinder 3 glow plug control circuit is functioning correctly. | OBD-II Scanner, Vehicle Manual |
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I test OBD-II scanners and make DIY Engine diagnostics guides to help you solve your car problems without having to depend on the mechanic. A lot of them will try to scam you or are just no help at all. About Juraj Lukacko