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P0130 O2 Sensor Fault on 2002 Chrysler Sunfire: Diagnosis and Repair Guide

Model: 2002 Sunfire Fault Code: P0130 Posted: 2009-07-27 14:15

Hi everyone, My check engine light came on recently, so I used a code reader to retrieve the fault code P0130 — O2 Sensor Circuit Malfunction (Bank 1, Sensor 1). My understanding is that there are two oxygen sensors: one upstream (before the catalytic converter) and one downstream (after the catalytic converter). However, I'm unsure which sensor this specific code refers to. Can anyone clarify? I suspect the issue may be with the upstream O2 sensor, as it's more commonly affected by wear or contamination. Given that my 2002 Sunfire is over 15 years old and has had minimal maintenance, I believe replacement of the upstream sensor is warranted. The wiring appears intact, so I'm not seeing any obvious electrical issues. Are there other potential causes for P0130? Should I replace both sensors or just the upstream one? Thanks in advance for your insights — this information is very helpful! Spec36

Related fault codes
P0130
Comments (5)
Anonymous 2009-07-27 14:45

The P0130 code typically points to the upstream oxygen sensor (pre-catalytic converter). However, given the age of your 2002 Sunfire, it's advisable to replace both the upstream and downstream sensors for optimal performance and emissions control.

Anonymous 2009-07-27 15:02

Thanks for the clarification — that makes sense and helps confirm my troubleshooting approach.

Anonymous 2009-07-28 05:47

For best compatibility and reliability, make sure to purchase OEM or high-quality aftermarket sensors specifically designed for the 2002 Chrysler Sunfire.

Anonymous 2009-07-28 21:20

Does anyone know how to confirm what 'Bank 1, Sensor 1' refers to on a 2002 Sunfire? I'm trying to locate the correct sensor position for replacement.

Anonymous 2009-07-29 09:15

The 2002 Sunfire has an inline-four engine configuration with only one cylinder bank. Therefore, 'Bank 1' refers to the single bank of cylinders, and Sensor 1 is the upstream oxygen sensor located before the catalytic converter. Replacing this sensor should resolve the P0130 code.