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P0320 Fault Reappears in 2001 Dodge Neon After CKP Replacement - Voltage Issue at 9.1V?

Model: dodge neon Fault Code: P0320 Posted: 2010-09-26 21:13

Hello, I own a 2001 Dodge Neon with approximately 60 miles on the odometer. Six months ago, I replaced the Crankshaft Position Sensor (CKP) due to a P0320 fault. The original Mopar CKP sensor was installed and initially resolved the issue — but after only six months, the same P0320 code returned. I have since replaced the sensor again, yet I'm still experiencing intermittent failures. During my latest inspection, I measured the voltage supply to the CKP sensor harness connector and found it to be 9.1 volts, which is above the expected range of 8 volts. My question: Could this 1-volt difference damage the sensor? Or could the Powertrain Control Module (PCM) be sending an incorrect voltage signal? I'm concerned that even though the car currently runs smoothly with the new CKP, it may fail again soon. Is a 9.1V supply within acceptable limits for this application? And is there any known issue with the wiring harness or environmental exposure (e.g., near EGR tube or coil pack) causing degradation? Thank you for your insights.

Related fault codes
P0320
Comments (3)
Anonymous 2010-09-27 04:58

Did you purchase the crankshaft position sensor from an authorized dealer? I recommend inspecting the wiring harness connected to the CKP, especially where it runs beneath the EGR tube and down toward the coil pack. Look for signs of burn damage or oil soaking — these can cause intermittent faults and lead to P0320 codes.

Anonymous 2010-09-27 10:50

Yes, the sensor is an original dealer-grade Mopar CKP. I'm now checking the harness for physical issues. The voltage reading of 9.1 volts on the power supply line to the CKP has been flagged as out of range (maximum acceptable voltage should be 8 volts). Is this value actually incorrect? The car is currently running fine with the new sensor, but I'm unsure if it will fail again in a few months. Thank you for your help.

Anonymous 2010-09-27 16:05

I don't believe a 9-volt reading would be serious — if the issue were critical, the engine wouldn't start. A small voltage fluctuation like this is likely within tolerances and may not directly damage the sensor or cause persistent P0320 faults. However, it's still worth verifying wiring integrity and environmental exposure.