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 MANUALSBUICK2000PARK AVENUE BASE, 3.8 KREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROL SYSTEM - SELF-DIAGNOSTICS - 3.8LDIAGNOSTIC TESTSDTC P0327: KNOCK SENSOR CIRCUIT - BANK 1 (EXCEPT CAMARO & FIREBIRD)DIAGNOSTIC PROCEDURES
2000 Buick Park Avenue Base, 3.8 K
Diagnostic Procedures
2000 Buick Park Avenue Base, 3.8 KSECTION Diagnostic Procedures
- Perform On-Board Diagnostic (OBD) system check. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK under SELF-DIAGNOSTIC SYSTEM. After performing OBD system check, go to next step.
- If engine knock can be heard, repair mechanical problem before proceeding with test. After repairs, operate vehicle within conditions required to set DTC. Using scan tool, select DTC, SPECIFIC function and enter this DTC. If scan tool indicates that this DTC FAILED THIS IGN, go to step 4. If scan tool does not indicate that this DTC FAILED THIS IGN, go to next step.
- Turn ignition on, engine off. Read and record FAILURE RECORDS data for this DTC. Operate vehicle within conditions noted in FAILURE RECORDS data. Using scan tool, read SPECIFIC DTC. If scan tool indicates that this DTC FAILED THIS IGN, go to next step. If scan tool does not indicate that this DTC FAILED THIS IGN, see DIAGNOSTIC AIDS .
- Disconnect PCM and KS harness connector. Check KS circuit for open or short to ground. Repair as necessary. After repairs, go to step 7. If circuit is okay, go to next step.
- Check KS signal circuit for poor terminal connection at knock sensor. Repair as necessary. After repairs, go to step 7. If no problem is found, go to next step.
- Replace KS. After replacing sensor, go to next step.
- Read and record FAILURE RECORDS data for DTC P0327. Operate vehicle within conditions noted in FAILURE RECORDS data. Using scan tool, read SPECIFIC DTC. If scan tool indicates that this DTC FAILED THIS IGN, return to step 2. If scan tool does not indicate that this DTC FAILED THIS IGN, repair is complete.
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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.