4.0

definitely annoying
Typical Repair Cost:
No data
Average Mileage:
122,000 miles
Total Complaints:
1 complaints

Most common solutions:

  1. not sure (1 reports)
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problem #1

Sep 012011

Concorde LXI 3.5L

  • Automatic transmission
  • 122,000 miles

The car will run fine and once it's turned off after a minute to hours, if restarted it won't. The car will crank but not turnover. A diagnostic engine code was detected, C1840. NO ONE KNOWS WHAT THIS CODE IS. PLEASE HELP.

- Gail D., Charleston, SC, US

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