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 MANUALSPONTIAC1997GRAND PRIX GTP, 4D SEDANREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 1 (ENGINE CONTROLS - TESTS W/CODES - 3.1L ENGINE)DIAGNOSTIC TROUBLE CODESDTC P1380 - EBTCM DTC DETECTED ROUGH ROAD DATA UNUSABLEDIAGNOSTIC PROCEDURES
1997 Pontiac Grand Prix GTP, 4D Sedan
Diagnostic Procedures
1997 Pontiac Grand Prix GTP, 4D SedanSECTION Diagnostic Procedures
WARNING: This page is about a different variant/trim than selected.
- Perform ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK. See the BASIC TESTING - 3.1L article. After performing OBD system check, go to next step.
- Using scan tool, select DTC INFO and note if this DTC has failed this ignition cycle. If DTC failed, diagnose EBTCM system using the BRAKES SYSTEM - ANTI-LOCK article. If DTC did fail this ignition, go to next step.
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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.