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2001 Chrysler Neon P0132, P171, and P106 Codes - What Do They Mean? Diagnosing O2 Sensor and MAP Sensor Issues

Model: Chrysler Neon 2001 Fault Code: P0135 Posted: 2006-09-18 03:00

Hi everyone, I'm currently troubleshooting several check engine light codes on my 2001 Chrysler Neon 1.6 SE. The issues are as follows: - P0132: This code appeared after washing the engine bay and has been recurring specifically during rainy weather. I understand this relates to the upstream oxygen (O2) sensor, but I'm concerned about whether a wiring issue or sensor failure is at play. - P171: This code only appeared once and then disappeared on its own. I'm wondering if it's significant enough to investigate further. - P106: This code has come up frequently over the past month, often fluctuating in and out of existence. It was associated with a persistent RPM issue—my car would stay at around 3000 RPM without me pressing the gas pedal, and when I tried to accelerate, it wouldn't respond. After turning off the engine and restarting, the behavior resolved. A mechanic from the dealership previously re-wired the harness connected to the MAP sensor. I'm now trying to determine if the harness repair was sufficient or if further diagnostics are needed. Specifically: - Is a rewired harness enough to resolve P106 and related symptoms? - Should I replace the O2 sensor (which can be expensive), or is there a way to test it before doing so? - Does P171 warrant any action given that it only appeared once? Any real-world experiences with these codes on 2001 Neon models would be greatly appreciated. Thanks in advance! Note: All codes are from the OBD-II system, and I'm using a standard scan tool to monitor them.

Related fault codes
P0135P0136P0171P0172
Comments (3)
Anonymous 2006-09-18 08:36

If repairing the wiring resolves the code, that's likely the root cause. The P0132 code points to an upstream O2 sensor—commonly linked to moisture-related wiring issues in older Neon models. I've seen numerous cases where water ingress causes intermittent faults during rain. Since this only occurs when wet, a proper inspection of the sensor wiring harness is essential. A simple repair or waterproofing may be all that's needed. Good luck and please update us on your progress!

Anonymous 2006-09-18 12:47

Thanks for the input! The P106 and P2101 codes haven't reappeared since the harness was repaired, so I'm cautiously optimistic it’s resolved. Regarding P171—since it only showed up once, it may not be a critical issue, but worth monitoring if symptoms return. For P0132: while the O2 sensor might seem like a likely culprit, just because there's a code doesn't mean the sensor is dead. A proper diagnostic test (like live data readings or voltage checks) can confirm whether the sensor is functioning correctly before replacing it—this avoids unnecessary expense.

Anonymous 2006-09-18 14:00

Always get a full diagnostic from a professional! The presence of P0132 doesn't automatically mean you need to replace the O2 sensor. A proper scan and live data analysis can determine if it's a wiring issue, signal degradation, or actual sensor failure. In many cases, moisture in the harness is the real problem—especially on older models like the 2001 Neon.