The P0140 code indicates that there is no activity detected in the O2 sensor circuit for Bank 1 Sensor 2. This sensor is responsible for monitoring the oxygen levels in the exhaust gases after they have …

Dec 29, 2025 · Symptoms of P0140 include decreased fuel efficiency, poor engine performance, and the Check Engine Light illuminating, making it essential to address the issue promptly. To fix the P0140 …

Oct 26, 2023 · If your car's ECM throws a P0140 trouble code, you'll want to look into it soon. Here are common symptoms and causes of this code...

Hi, I have a check engine light on, and I had it scanned to reveal the following codes: p0140 (o2 sensor circuit no activity detected bank 1 sensor 2) and p0161 (o2 sensor heater circuit bank 2 sensor 2).

Dec 21, 2024 · What does the P0140 Oxygen Sensor Circuit No Activity Detected (Bank 1, Sensor 2) mean? P0140 code gets triggered when the Engine Control Module has detected inactivity from the …

Sep 22, 2025 · Learn how to decipher, diagnose and repair the P0140 emissions system trouble fault code.

What does a flashing Check‑Engine Light indicate with a P0140 code? A flashing MIL usually signals a severe misfire condition, which can coexist with P0140 if the ECM is forced into open‑loop operation.

Fix the P0140 code. Learn diagnosis, root causes, and step-by-step replacement for your O2 sensor circuit malfunction.

This guide explains the P0140 code’s meaning, symptoms, causes, and step-by-step diagnostics to fix it like a pro—potentially saving you $400-$800 from overpriced oxygen sensor and catalytic converter …

Jul 31, 2024 · Code P0140 is typically triggered when your vehicle’s powertrain control module detects a problem with the post-catalytic monitoring oxygen sensor circuit. The most common symptoms of a …