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With a scan tool.
That requires a scan tool.
The error code p1193 on a 2001 Dodge Grand Caravan indicates that the intake air temperature sensor has failed. The sensor can be replaced by unbolting it, removing the wiring harness, and pulling it from the intake.
automatiic transmission control system malfunction
Trouble code P0149 means:Fuel Timing error
Charging system , voltage too low
With a scan tool.With a scan tool.
Cylinder #2 misfire. see link below
21 is for the oxygen sensor reading staying at center.
turn power on off on off on. do not start just the power
With a code reader that plugs in under the drivers side dash.
Egr position sensor rationality. Likely a failed egr valve.