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2001 Chevy Lumina 3.1L P0336 Code: Hesitation, Long Cranking, and CKP Sensor Replacement Issues

Model: 2001 Chevy Lumina Fault Code: P0336 Posted: 2016-01-16 11:20

I recently replaced the 24x crankshaft position (CKP) sensor on my 2001 Chevrolet Lumina 3.1L engine due to persistent symptoms including long cranking, hesitation during acceleration, and random stalling. After installation, the engine runs smoother initially, but I'm still experiencing hesitation at highway speeds and the P0336 diagnostic trouble code reappears. I've completed a CKP sensor relearn procedure, but the issue persists. The only prior codes before replacement were intermittent P0300 and P0305. My mechanic cleared the codes and performed a relearn after replacing the sensor—initially improving performance for 20–30 minutes before symptoms returned. I've also replaced components such as camshaft sensors, fuel injectors, spark plugs, wires, EGR valve, fuel pump, and ignition module over the past four years. Despite these efforts, the P0336 code remains. I'm seeking advice on troubleshooting this specific issue with the 24x CKP sensor in a 2001 Lumina.

Related fault codes

P0336

Comments (3)

Anonymous 2016-01-16 13:02

The 24x crankshaft position sensor is located behind the harmonic balancer—correct? You replaced it after clearing the P0336 code, right? A lab scope or graphing scanner would provide more detailed insight into signal quality. However, such tools aren't widely available. Let's start with basic checks: ensure the CKP connector is clean, free of corrosion, and securely connected—sometimes failures occur in the first few inches of wiring before reaching the connector. Also verify that no secondary wires are near or rubbing against the harness, which can cause intermittent faults.

Anonymous 2016-01-17 09:58

Yes, the sensor is behind the harmonic balancer. My previous mechanic—retired from a GM dealership—and his brother runs a small shop used a shop-grade scanner to diagnose the issue. They identified P0300 and P0305 intermittently before recommending replacement of the 24x crank sensor. After replacing it, the car ran well for about 20–30 minutes but then returned to its original symptoms: long cranking and hesitation at higher speeds. The shop has since closed due to retirement, so I had another service shop clear the codes and perform a CKP relearn post-replacement—no improvement. I've also replaced multiple engine components over the past four years including cam sensor, injectors, fuel pressure regulator, spark plugs, wires, EGR, fuel pump, and ignition module for various issues.

Anonymous 2016-01-17 10:31

Why was a CKP relearn performed before replacing the 24x sensor? Was a scan tool used to monitor actual crankshaft RPM during operation? Were any circuit continuity or signal tests conducted on the 24x sensor? The 24x sensor is primarily responsible for engine idle stability and smoothness at low speeds, as well as misfire monitoring. It does not control spark timing—this function relies on the 7x sensor. Importantly, a vehicle can operate without the 24x signal, but performance will degrade significantly in terms of drivability and emissions control. My GM acquaintance may not have been aware of these distinctions.