Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2007 Chrysler Crossfire Base, 2D ConvertibleFACTORY OEM SERVICE PROCEDURE
P0418-Secondary Air Injection System Control Circuit: Notes
- When Monitored : Once per driving cycle when the Engine is at idle, Air Pump was activated at start-up, Barometric Pressure greater than 78 kPa (11 psi), Engine Coolant Temperature is greater than 50°C (122°F), and no other DTCs.
- Set Condition : When the test is enabled, the O2 Sensor must increase by at least 23% (rich).
| Possible Causes |
| AIR PUMP RELAY CONTROL CIRCUIT OPEN |
| AIR PUMP RELAY CONTROL CIRCUIT SHORT TO GROUND |
| AIR PUMP RELAY CONTROL CIRCUIT SHORT TO VOLTAGE |
| AIR PUMP RELAY CONTROL CIRCUIT SHORT TO AIR PUMP RELAY OUTPUT CIRCUIT |
| RELAY CONTROL MODULE |
| POWERTRAIN CONTROL MODULE |
For a complete Powertrain Control Module Circuit Diagram, refer to SCHEMATICS AND DIAGRAMS .
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.