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 MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 28 (ENGINE CONTROL SYSTEM - SELF-DIAGNOSTICS)DIAGNOSTIC TESTSDTC P1335: CKP SENSOR CIRCUITDIAGNOSTIC PROCEDURES
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6
Diagnostic Procedures
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Diagnostic Procedures
WARNING: This page is about a different car, the 2003 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
- Did you perform the Diagnostic System Check - Engine Controls? If yes, go to next step. If no, perform diagnostic system check - engine controls. See DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS under SELF-DIAGNOSTIC SYSTEM.
- Use scan tool to clear DTCs. Using scan tool, place vehicle into CHECK MODE. See SERVICE BAY TESTS under SELF-DIAGNOSTIC SYSTEM. Operate vehicle within freeze frame conditions as noted. Does DTC P1335 set? If yes, go to next step. If no, go to DIAGNOSTIC AIDS .
- Turn ignition switch to OFF position. Measure resistance of CKP sensor, using a DMM. Is resistance 985-1670 ohms at 122°F (50°C) or 1265-1890 ohms at 212°F (100°C)? If yes, go to next step. If no, go to step 6.
- Disconnect PCM White 34-pin harness connector. Check for a open or short in CKP circuits. Repair as necessary. Was a repair necessary? If yes, go to step 8. If no, go to next step.
- Check for a faulty electrical connection at PCM and CKP sensor. Repair as necessary. Was a repair necessary? If yes, go to step 8. If no, go to next step.
- Replace CKP sensor. After repair, go to step 8.
- Replace PCM. After repair, go to step 8.
- Use scan tool to clear DTCs. Turn ignition OFF for 30 seconds. Start engine. Operate vehicle within CONDITIONS FOR RUNNING DTC as specified. Does DTC run and pass? If yes, go to next step. If no, go to step 2.
- Using scan tool, observe stored information, CAPTURE INFO. Does scan tool display any DTCs that have not been diagnosed? If yes, see DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no, system is okay at this time.
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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.