Check engine light
Asked by GuruX5LDR Oct 06, 2018 at 09:42 AM about the 2005 Chrysler Town & Country
Question type: Maintenance & Repair
I have a 2005 Chrysler Town & Country van. My check
engine came on. The mechanic has replaced a seal. Two
weeks later the check engine light came on again and the
mechanic had to.replace the gas cap seal. A day later the
check engine light came on again. Could the check engine
light be hitting something metal causing it to keep coming
on?
4 Answers
It sounds as if you have an evap system leak, they can be very difficult to locate, you may have to find a shop with a "smoke" machine to find it.
The mechanic did that and that's why they had to replace the sensor. Had no problems for 2-3 weeks before the check engine light came on again and they did the smoke test and found it was the gas cap seal.
Recheck codes if it's a evap code there is something called the evap monitor it runs randomly but pulls a vacuum on the fuel tank and closes all vent valve it must hold vacuum for 24 hours, tough to find if one of he valves is bad for t may not show up with a smoke test because the smoke gets blown into the intake manifold where you can't see it, the vacuum supply hoses must be removed to check valve leakage
