Diagnostic Procedures
- Perform POWERTRAIN ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK , then go to next step.
- Turn ignition on, with engine off. Review FREEZE FRAME data for this DTC and note parameters. Clear DTCs. Turn ignition off for 15 seconds. Start engine and operate at greater than 500 RPM and as close to conditions recorded in FREEZE FRAME as possible. Check for DTCs. If DTC P0336 is set, go to next step. If DTC P0336 is not set, see DIAGNOSTIC AIDS.
- Using test light connected to battery voltage, probe CKP sensor shielding on wiring harness. If test light is on, go to next step. If test light is off, go to step 5).
- Check for poor connection and terminal tension at CKP sensor and ECM harness connectors. Check sensor for proper installation. A sensor that is loose or not fully seated could cause an excessive air gap between sensor and reluctor wheel. Check for loose or damaged crankshaft reluctor wheel. Ensure CKP sensor is not touching reluctor wheel. Repair as necessary. After repairs, go to step 7). If connections, terminals and components are okay, go to step 6).
- Repair CKP shield circuit. After repairs, go to step 7).
- Replace CKP sensor. After replacing sensor, go to next step.
- Using scan tool, clear DTCs. Turn ignition off for 15 seconds. Start engine and operate at greater than 500 RPM. Check for DTCs. If DTC P0336 is set, go to step 2). If DTC P0336 is not set, go to next step.
- If other DTCs were present during OBD system check and have not been diagnosed, go to applicable DTC. If no other DTCs are present, system is okay.