Cadillac ATS 2013-2019 Emissions & Sensors Specifications

The emissions sensors in the 2013-2019 Cadillac ATS include oxygen sensors, NOx sensors, and temperature sensors. These sensors are designed to work with the 2.0L turbo or 3.6L V6 engines, ensuring optimal performance and emissions control. The oxygen sensors are Bosch LSU 4.9 wideband sensors, compatible with the ECM software. NOx sensors are used for diesel models, but the ATS primarily uses gasoline engines. Temperature sensors monitor catalyst and engine temperatures, with operating ranges between -40°F to 250°F. Compatibility is ensured for all model years within this range, but software updates may be required for proper function.

Emissions sensors require regular inspection and maintenance to ensure proper function. Every 30,000 miles, inspect oxygen sensors for contamination or damage. Clean or replace them as needed. Check electrical connections and wiring for corrosion or damage. Replace sensors every 100,000 miles or as specified in the owner's manual. Use only OEM or high-quality aftermarket replacements to maintain performance. Avoid using sensor cleaners that may damage sensitive electronics. Always refer to the service manual for specific procedures and guidelines.

To replace an emissions sensor, start by locating the sensor, which is typically near the exhaust manifold or catalytic converter. Disconnect the battery to prevent any electrical spikes. Use a wrench or socket to remove the sensor from its mounting. Carefully pull the sensor out and disconnect the electrical connector. Install the new sensor by reversing the process, ensuring it is securely tightened. Reconnect the battery and use a scan tool to clear any codes. Test drive the vehicle to ensure proper operation and monitor for any new codes.

If the Check Engine Light illuminates, use a scan tool to retrieve the specific fault code. Codes like P0130 (O2 sensor circuit low voltage) or P0155 (O2 sensor heater circuit) indicate sensor issues. Inspect the sensor for physical damage or contamination. Check the electrical connector for corrosion or loose connections. Test the sensor's voltage and resistance using a multimeter. Compare readings to specifications in the service manual. If the sensor fails testing, replace it with a new one. Clear the codes and test drive the vehicle to ensure the issue is resolved.

To optimize emissions sensor performance, ensure proper engine tuning and maintain a clean air filter. Regularly inspect and maintain the exhaust system to prevent leaks or blockages. Avoid using lower-quality fuel that may contain contaminants. Keep the vehicle's software up to date with the latest ECM calibrations. Monitor sensor readings using a scan tool and compare them to specifications in the service manual. Avoid extreme driving conditions that may cause sensor degradation. Regular maintenance and inspections will help maintain optimal sensor performance and overall vehicle efficiency.