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 MANUALSCHEVROLET2015CRUZE ECO, AUTOMATIC TRANSREPAIR AND DIAGNOSISELECTRICALINSTRUMENT PANEL SYSTEM DISPLAYS AND GAUGESDIAGNOSTIC INFORMATION AND PROCEDURESENGINE OIL PRESSURE INDICATOR MALFUNCTIONCIRCUIT/SYSTEM TESTING

2015 Chevrolet Cruze Eco, Automatic Trans

Circuit/System Testing

2015 Chevrolet Cruze Eco, Automatic TransSECTION Circuit/System Testing

NOTE: Circuit/System Verification must be performed before proceeding with Circuit/System Testing.

Ignition OFF, disconnect the harness connector at the B37 Engine Oil Pressure Switch, ignition ON.
Verify the scan tool Engine Oil Pressure Switch parameter is OK.
- If not OK
1. Ignition OFF, disconnect the harness connector at the K20 Engine Control Module.
2. Test for infinite resistance between the signal circuit terminal 1 (or A) and ground.
  - If less than infinite resistance, repair the short to ground on the circuit.
  - If infinite resistance, replace the K20 Engine Control Module.
- If OK
Install a 3A fused jumper wire between the signal circuit terminal 1 (or A) and ground.
Verify the scan tool Engine Oil Pressure Switch parameter is Low.
- If not Low
1. Ignition OFF, disconnect the harness connector at the K20 Engine Control Module, ignition ON.
2. Test for less than 1 V between the signal circuit and ground.
  - If 1 V or greater, repair the short to voltage on the circuit.
  - If less than 1 V
3. Test for less than 2 Ω in the signal circuit end to end.
  - If 2 Ω or greater, repair the open/high resistance in the circuit.
  - If less than 2 Ω, replace the K20 Engine Control Module.
- If Low
Test or replace the B37 Engine Oil Pressure Switch.

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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.