P0420 Diagnostic Trouble Code Discussion for July 2016
Catalyst Efficiency Below Normal (Bank 1)
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| Help Request | Posted | |
| 2001 Honda Civic EX 1.7L No Start VIN: 1HGEM22951 P0420: Catalyst Efficiency Below Threshold (Bank 1). car came in with an intermittent no start. found that it would always no start if the engine was warmed up then turned off. Then would not crank back up until it cooled down a little. While we had a no start, I found good spark, injector pulse, and the fuel pu... |
July 29, 2016 |
