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HOMESERVICE MANUALSCHEVROLET2005OPTRA5 BASE, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - 1.8L (L79) - DTC P1115 TO DTC P1655DTC P1336TEST DESCRIPTION
2005 Chevrolet Optra5 Base, Standard

Test Description

2005 Chevrolet Optra5 Base, StandardSECTION Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. 2:  The Crankshaft Position Variation Learn Procedure may have to be repeated up to 5 times before the procedure is learned.
Step Action Yes No
1 Did you perform the Diagnostic System Check - Engine Controls? Go to Step 2  Go to Diagnostic System Check - Engine Controls
2  Perform the crankshaft position system variation learn procedure. Refer to CKP System Variation Learn Procedure .
Does the scan tool display Learned This Ignition?		 Go to Step 4  Go to Step 3 
3 Inspect for the following conditions:
  • Worn crankshaft bearings
  • A damaged reluctor wheel
  • Debris between the CKP sensor and the reluctor wheel
  • Excessive crankshaft runout
  • A damaged Crankshaft
  • Interference in the signal circuit of the CKP sensor
  • A coolant temperature that is not within the Conditions For Running the DTC
  • The ignition switch is in the ON position until the battery has insufficient voltage
  • An ECM power disconnect with the ignition ON may erase the stored values and set DTC P1336

Did you complete the inspection?		 Go to Step 4  -
4
  1. Clear the DTCs with a scan tool.
  2. Turn OFF the ignition for 30 seconds.
  3. Start the engine.
  4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records.
Did the DTC fail this ignition?		 Go to Step 2  Go to Step 5 
5 Observe the Capture Info with a scan tool.
Are there any DTCs that have not been diagnosed?		 Go to Diagnostic Trouble Code (DTC) List System OK
RENDER: 1.0x

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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.