LEMON Manuals: Even more car manuals for everyone
Home >> Buick >> 2013 >> Verano Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 197 (Instrument Panel System Displays And Gauges) >> Diagnostic Information and Procedures >> DTC P0521 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2012 Buick Verano. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the B37 engine oil pressure switch.
  2. Ignition ON, verify the scan tool Engine Oil Pressure Switch parameter is OK.
    • If not the specified value, test for the signal circuit terminal 1 for a short to ground. If the circuit tests normal, replace the K20 engine control module.
  3. Install a 3 A fused jumper wire between the signal circuit terminal 1 and ground . Verify the scan tool Engine Oil Pressure Switch parameter is Low.
    • If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K20 engine control module.
  4. If all circuits test normal, test or replace the B37 engine oil pressure switch.
scientia non olet · About LEMON Manuals