P0431 Diagnostic Trouble Code Discussion for January 2008
Warmup Catalyst System Efficiency Low (Bank 2)
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| Help Request | Posted | |
| 2006 Jeep Wrangler Unlimited 4.0L MIL Lamp on VIN: 1J4FA44S46 P0431: Catalyst Efficiency Below Normal (Bank 2). ... went bad, we've installed a jasper engine. The Check engine light is coming on with code P0431, we changed ox sensor Bank 1 Sensor 2, but after driving a few miles the light comes on. The customer stated it actually started just before the engine went bad.... |
January 08, 2008 |
