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Home >> Chevrolet >> 2006 >> SSR Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 61 (Engine Exhaust System) >> Diagnostic Information and Procedures >> DTC P166A >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page is about a different car, the 2006 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the exhaust flow control valve solenoid connector.
  2. Ignition ON, measure for 0 volts between the exhaust valve solenoid supply voltage circuit and ground.
    • If over 0 volts, test for short to voltage in exhaust valve solenoid supply voltage circuit.
  3. Ignition ON, use scan tool to command exhaust flow control relay ON, measure for 10 volts or above between the exhaust valve solenoid supply voltage circuit and ground.
    • If under 10 volts, test for short to ground in exhaust valve solenoid supply voltage circuit.
  4. If all circuits test normal replace the Exhaust Flow Control Module.
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