P0067

Symptoms

• Check Engine Light Illuminates
• Rough engine idling
• Increased fuel consumption
• Reduced engine power
• Hard diesel engine operation
• Increased exhaust smoke
• Difficulty starting the engine

Causes

• Wiring short circuit to power
• Air support control unit malfunction
• Broken or damaged ground wire
• ECU malfunction
• Corrosion or oxidation of connector contacts
• Air pressure sensor malfunction
• Wiring harness damage
• Air system compressor malfunction

How to Fix

1. Connect a diagnostic scanner and read all error codes
2. Check the voltage in the injector air support control circuit
3. Inspect the wiring harness for damage and short circuits.
4. Check the condition of connectors and contacts, clean from corrosion
5. Measure the resistance of the control circuit and compare with the standards
6. Check system grounding
7. Test the air support control unit
8. If necessary, replace faulty components
9. Clear error codes and test drive
10. Recheck the system with a diagnostic scanner

Related codes

Error P0067 by Vehicle Brand