P1131 Diagnostic Code for 1998 Mercury Sable 3.0L - Causes and Fixes
The P1131 diagnostic code appears intermittently on my 1998 Mercury Sable 3.0L, occurring approximately every 2 times at 190,000 kilometers. The vehicle runs smoothly, and I recently replaced the spark plugs and wires. Despite this, the code persists. Could anyone provide insight into potential causes or solutions? Any advice would be greatly appreciated.
Replace the O2 Sensor Bank 1 Sensor 1 (located on the passenger side, between the exhaust manifold and catalytic converter). Ensure you purchase this sensor from an authorized dealer to avoid issues with aftermarket parts. Good luck—please update us if the problem resolves after replacement.