The P068E: Cylinder 8 Glow Plug Control Circuit Low code indicates that the control module has detected a low voltage condition in the glow plug control circuit for cylinder 8. This low voltage can prevent the glow plug from heating properly, leading to difficulties starting the engine, especially in cold weather. Possible causes include a faulty glow plug, wiring issues, or a malfunction in the control circuit.
P068E – Quick Overview
| Code | Information |
|---|---|
| Meaning | P068E: Cylinder 8 Glow Plug Control Circuit Low |
| Is it serious? | Yes, as it can lead to hard starting, especially in cold conditions. |
| Possible causes | – Low voltage in the cylinder 8 glow plug control circuit – Faulty glow plug – Wiring issue |
| How to diagnose? | – Test cylinder 8 glow plug control circuit for voltage – Inspect wiring and connectors – Replace glow plug if necessary |
P068E Meaning
The P068E code means that the control module has detected lower-than-expected voltage in the glow plug control circuit for cylinder 8. This can prevent the glow plug from heating up properly, making engine starts difficult, especially in cold weather.
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 circuits. | OBD-II Scanner |
| Test the Cylinder 8 Glow Plug Control Circuit for Voltage | Use a multimeter to measure the voltage in the glow plug control circuit for cylinder 8. Ensure the voltage matches the manufacturer’s specifications. | Multimeter |
| Inspect Wiring and Connectors | Inspect the wiring and connectors leading to cylinder 8’s glow plug for signs of damage, corrosion, or loose connections that could cause low voltage. | Flashlight, Multimeter |
| Test the Glow Plug for Cylinder 8 | Test the glow plug in cylinder 8 to ensure it is functioning correctly and heating properly. Replace the glow plug if necessary. | Diagnostic Tool, Multimeter |
| Replace the Glow Plug if Necessary | If the glow plug for cylinder 8 is faulty, replace it to restore proper engine starting performance, especially in cold conditions. | Replacement Glow Plug, Tools |
| Clear the Code and Test | After repairs, clear the code using an OBD-II scanner and test the vehicle to ensure the cylinder 8 glow plug control circuit is functioning properly. | OBD-II Scanner, Vehicle Manual |
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