LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Chevrolet >> 2007 >> Optra LS, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 1.8L (L79) >> Diagnostic Information and Procedures >> DTC P0337 >> Circuit/System Testing
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Circuit/System Testing

    IMPORTANT: If the CKP sensor lead is damaged in any way, replace the CKP sensor.
  1. Ignition OFF, disconnect the harness connector of the CKP sensor.
  2. Ignition ON, verify that 1.5-2 volts is available on the signal circuit and the low reference circuit of the CKP sensor.
    • If less than 1.5 volts, test the applicable circuit for a short to ground or an open/high resistance. If the circuits/connections test normal, replace the ECM.
    • If more than 2 volts, test the applicable circuit for a short to voltage. If the circuits/connections test normal, replace the ECM.
  3. If all circuits/connections test normal, test or replace the CKP sensor.
scientia non olet · About LEMON Manuals