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.
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HOMESERVICE MANUALSPONTIAC2006G6 GTP, 2D COUPE, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 17 (ENGINE CONTROL SYSTEM - 3.5L - DTC P0401 TO DTC P1133)DTC P0401CONDITIONS FOR RUNNING THE DTC
2006 Pontiac G6 GTP, 2D Coupe, Standard
Conditions for Running the DTC
2006 Pontiac G6 GTP, 2D Coupe, StandardSECTION Conditions for Running the DTC
WARNING: This page is about a different variant/trim than selected.
- DTCs P0068, P0101, P0102, P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0120, P0201, P0202, P0203, P0204, P0205, P0206, P0220, P0300, P0335, P0403, P0404, P0405, P0502, P0503, P0506, P0507, P0604, P0606, P0641, P0651, P1106, P1107, P1125, P2101, P2108, P2135, U0107 are not set.
- The engine run time may need to be more than 3 minutes.
- The Ignition 1 Signal parameter is between 11-18 volts.
- The AC Relay Command parameter does not change.
- The EGR position is less than 1 percent.
- The transmission is in third or fourth gear.
- The Current Gear parameter does not change.
- The decel fuel cut-off (DFCO) mode is not active.
- The Intake Air Temperature (IAT) sensor parameter is between 5-100°C (41-212°F).
- The Engine Coolant Temperature (ECT) sensor parameter is between 75-123°C (167-253°F).
- The Engine Speed parameter is between 1,000-1,500 RPM.
- The Manifold Absolute Pressure (MAP) sensor parameter is between 17-43 kPa.
- The Barometric Pressure (BARO) parameter is more than 74 kPa.
- The Throttle Position (TP) sensor parameter is less than 1 percent.
- The Vehicle Speed sensor parameter is between 45-113 km/h (28-70 mph) during deceleration.
- The vehicle will need to be driven more than 80 km/h (50 mph), and then allowed to decelerate. When the vehicle is decelerating, while meeting all of the criteria listed above, the PCM will enable the EGR flow test to run. As the EGR flow test is running, you will see the desired EGR Position parameter and the EGR Position Sensor parameter on the scan tool momentarily change from 0 to a calibrated value above 0. Additionally, the EGR Flow Test Count parameter on the scan tool will increment when each EGR flow test is completed.
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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.