Crossfire NOx Sensor + Exhaust Leak Fix Cost Guide

Had the same situation with my 2009 Chrysler Sebring. The check engine light triggered due to a failing NOx emission sensor, which turned out to be a faulty wiring connection at the sensor plug. The exhaust leak occurred near where the catalytic converter connects to the exhaust manifold. These issues often appear together since the exhaust system components are interconnected. A thorough diagnostic revealed the sensor failure was actually caused by exhaust gases leaking and contaminating the wiring harness. The repair required: Cleaning the sensor plug connections, Replacing corroded wiring sections, Resealing the exhaust manifold gasket, Installing new mounting hardware for the catalytic converter This was a serious repair that needed immediate attention since faulty emission sensors can lead to increased fuel consumption and potential engine damage. The exhaust leak also risks exposing the engine bay to harmful gases. Recommend having both issues fixed simultaneously since they likely share a root cause. Make sure the shop performs a complete exhaust system inspection to identify all potential leak points.

Thanks for sharing your experience with the Sebring. I had similar problems with my Crossfire last winter. The air-fuel ratio was completely off due to sensor failure, causing rough idling and poor performance. The mechanic found both a bad NOx sensor and cracked exhaust manifold. Did you remember roughly how much the total repair cost? Also curious if you noticed any other issues pop up since getting it fixed? My pollution control warning light occasionally flickers even after the repairs.

Following up on your questions, after seeing the mechanic last month for my Sebring, the NOx sensor failure was completely resolved. It turned out to be just a damaged cable connection to the sensor, which only cost 95€ to repair. Much simpler fix than expected. The exhaust system has been working perfectly since then with no additional issues. Your flickering pollution control warning light could indicate incomplete repairs or a separate sensor problem. These modern emission control systems are quite sensitive, even minor connection issues can trigger warnings. Worth mentioning that proper diagnosis of sensor failures is crucial since they directly impact engine performance and emissions. Would suggest having that intermittent warning light checked soon to prevent any potential damage to the catalytic converter or other components. For peace of mind, ask your mechanic to perform a complete nitrogen oxide emissions test. This will confirm if all sensors are functioning correctly within the exhaust system.

I finally took my Crossfire to a trusted mechanic after getting some great advice here. The diagnostic revealed both a faulty NOx sensor and a cracked exhaust manifold, causing the issues with my pollution control system. The repair included: New NOx sensor installation: 350€, Exhaust manifold replacement: 480€, Labor costs: 290€, Total bill: 1120€ The mechanic found the air-fuel ratio was way off due to the sensor failure. The cracked manifold was letting exhaust gases escape, which explained the rough running. They completed all repairs in one day and the engine now runs perfectly smooth with no warning lights. Definitely worth fixing both issues together since they were related. The diesel engine now starts instantly and runs much cleaner. Really glad I got this sorted before it caused more extensive damage to the catalytic converter or other components. Thanks again for the helpful advice that pointed me in the right direction for diagnosis and repair approach.