Infiniti Q45 1990-1996 Emissions & Sensors Specifications

Emissions sensors for the 1990-1996 Infiniti Q45 are specifically designed for this model and may not be compatible with other vehicles. These sensors are calibrated to meet the unique emissions control requirements of the Q45 during this production period. Always verify part numbers and consult the vehicle's service manual or a certified technician to ensure compatibility.

Regular maintenance for emissions sensors includes inspecting for damage or corrosion, ensuring proper electrical connections, and checking for fault codes using an OBD-I scanner. Replace sensors every 60,000-100,000 miles or as indicated by diagnostic trouble codes. Clean the sensor area during routine engine maintenance to prevent contamination.

To replace the emissions sensor, first, locate the sensor near the exhaust manifold or catalytic converter. Disconnect the electrical connector, then use a wrench to remove the sensor. Install the new sensor by threading it in by hand to avoid cross-threading, then tighten with a wrench. Reconnect the electrical connector and clear any fault codes using an OBD-I scanner.

If the emissions sensor fails, first check for diagnostic trouble codes using an OBD-I scanner. Inspect the sensor for physical damage, corrosion, or loose connections. Clean the sensor area if contaminated. If the issue persists, replace the sensor. Ensure the replacement part matches the original specifications to avoid further issues.

To optimize performance, ensure the engine is running efficiently by maintaining proper air-fuel ratios and replacing worn spark plugs or oxygen sensors. Use high-quality fuel and avoid short trips that prevent the sensor from reaching optimal operating temperature. Regularly inspect and clean the sensor area to prevent contamination.