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96 Chevrolet Impala Slow Start with OBD2 Code P0153 - O2 Sensor Bank 2 Sensor 1 Issue

Model: 96 Impala Fault Code: P0153 Posted: 2015-04-02 20:11

My 1996 Chevrolet Impala has started exhibiting slow engine cranking, accompanied by a check engine light and diagnostic code P0153. The O2 sensor in Bank 2, Sensor 1 was recently replaced due to a reported lean condition. The vehicle has 159,000 miles and retains original vacuum lines, starter, and alternator components. Despite the replacement, the issue persists. I'm seeking advice on potential root causes, especially given that P0153 is not actually a lean code but rather indicates a malfunction in the oxygen sensor reading.

Related fault codes
P0153
Comments (4)
Anonymous 2015-04-03 07:17

For 96 Impala models with 3.5L or 3.9L engines: Why was the O2 sensor replaced? Are there any other diagnostic trouble codes present? Did you install an AC Delco sensor—this is a front bank sensor? What does your OBD2 scanner show for Bank 2, Sensor 1 readings? Reference: http://www.obd-codes.com/p0153

Anonymous 2015-04-03 14:57

Initially, the system flagged a lean condition, which prompted the replacement of the O2 sensor. I used an AC Delco sensor. After installation, the issue appeared to resolve—however, this was likely due to a weak battery. A full battery check is recommended.

Anonymous 2015-04-03 18:18

The fix was temporary—the check engine light returned with code P0153 reappearing. I need further insight into what might be causing the recurring issue and how to properly diagnose it.

Anonymous 2015-04-04 07:59

You should never replace a sensor solely because of a code—sensors are diagnostic indicators, not problem-solving tools. What specific lean-related code prompted the sensor replacement? Clarify: P0153 is not a lean code at all. For accurate diagnosis, refer to official OBD2 reference: http://www.obd-codes.com/p0153