Question about Honda CR-V
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Posted on Jan 02, 2017
Check both O2 sensor(s) and catalytic coverter.. P0420 means catalyst below threshold. Also check the sensor at the transmission and solenoid.
Posted on Feb 06, 2009
SOURCE: 92 honda accord lx D4 flashes
you have a transmission fault the D4 light blinks to tell you that there is a transmission problem when the light is blinking the transmission computer put the transmission into limp home mode so it will not shift normally and you should try not to drive it very far when it gets to this stage you need to have the transmission codes check to pin point the problem
Posted on May 29, 2009
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