P0431 Diagnostic Trouble Code Discussion for May 2011
Warmup Catalyst System Efficiency Low (Bank 2)
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| Help Request | Posted | |
| 2003 Mazda MPV EX 3.0L History Codes VIN: JM3LW28J93 P0431: Warmup Catalyst Efficiency Below Normal (Bank 2). ... P0421 & P0431. Read O2 sensor voltages with vehicle warm and voltages on all 4 sensors are all over the place - .03 to .930 and jumping all over the place. I picked the easy fruit on this one - connections, grounds, senso... |
May 04, 2011 |
