P068C Code - Cylinder 7 Glow Plug Control Circuit Low Voltage
Quick Answer
The P068C diagnostic trouble code (DTC) refers to an issue with the cylinder 7 glow plug control circuit in a diesel engine. Common causes include Faulty glow plug, Malfunctioning glow plug control module, Wiring or connector issues in the circuit. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P068C indicates Cylinder 7 Glow Plug Control Circuit Low Voltage.
- Common causes
- Common causes include Faulty glow plug, Malfunctioning glow plug control module, Wiring or connector issues in the circuit.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P068C Description
The P068C diagnostic trouble code (DTC) refers to an issue with the cylinder 7 glow plug control circuit in a diesel engine. Glow plugs are essential components in diesel engines that help warm up the combustion chamber during cold starts by heating the air-fuel mixture. When the engine is cold, the glow plug control module supplies voltage to the glow plugs to assist in starting the engine. The low voltage in the cylinder 7 glow plug control circuit indicates that there is insufficient power reaching the glow plug, which can lead to difficulty starting the engine, decreased fuel efficiency, and increased emissions.
Common Causes of P068C
- Faulty glow plug
- Malfunctioning glow plug control module
- Wiring or connector issues in the circuit
- Corrosion or poor connections in the circuit
- Engine control module (ECM) malfunction
Symptoms of P068C
- Hard starting or extended cranking time
- Rough idling or misfiring
- Decreased fuel efficiency
- Illumination of the check engine light
- Smoke or emissions coming from the exhaust
How to Fix P068C
- Diagnose the specific issue using a diagnostic scanner to confirm the cylinder 7 glow plug control circuit low voltage.
- Inspect the glow plug, control module, wiring, and connectors for any visible damage or corrosion.
- Test the glow plug resistance and check for continuity to determine if it is functioning properly.
- Replace any faulty components such as the glow plug, control module, or damaged wiring.
- Clear the DTC and perform a test drive to ensure the issue has been resolved.
Cost to Fix P068C
The typical repair cost for addressing a cylinder 7 glow plug control circuit low voltage issue can range from $100 to $300, depending on the specific components that need to be replaced and the labor involved. Keep in mind that these costs can vary based on factors such as the vehicle make and model, location, and the rates of the auto repair shop. It's recommended to obtain quotes from multiple shops to find the best price for the repair.
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Code P068C Information for Specific Makes
- P068C Chevrolet — Cylinder 7 Glow Plug Control Circuit Low Voltage
- P068C Ford — Cylinder 7 Glow Plug Control Circuit Low
- P068C GMC — Cylinder 7 Glow Plug Control Circuit Low Voltage
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