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 MANUALSBUICK2006TERRAZA CXL, 3.5 L, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 67 (ENGINE CONTROL SYSTEM - 3.8L (DTC P0418 TO DTC P1115))
2006 Buick Terraza CXL, 3.5 L, AWD
Section 67 (Engine Control System - 3.8L (DTC P0418 To DTC P1115))
2006 Buick Terraza CXL, 3.5 L, AWDSECTION Section 67 (Engine Control System - 3.8L (DTC P0418 To DTC P1115))
WARNING: This page is about a different car, the 2005 Buick LaCrosse and 2005 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
- Diagnosis
- DTC P0418 (L26, Nu3)
- DTC P0420
- DTC P0442
- DTC P0443
- DTC P0446
- DTC P0449
- DTC P0451
- DTC P0452
- DTC P0453
- DTC P0454
- DTC P0455
- DTC P0496
- DTC P0506
- DTC P0507
- DTC P0601-P0607, P1600, P1621, P1627, P1680, P1681, P1683, or P2610
- DTC P0641
- DTC P0650
- DTC P0651
- DTC P0685
- DTC P1106
- DTC P1107
- DTC P1111
- DTC P1112
- DTC P1114
- DTC P1115
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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.