Q: Car shuts off when the weather is hot

asked by on July 27, 2016

My car seems to be shutting off every time it gets hot outside.The dashboard is now showing the check engine light on. There is also the code indicating the cam sensor issue. During the cold months, there are no issues whatsoever. But when I went on a longer trip about a year ago when it was really hot, the car shut down on me several times. I restarted it each time and it immediately started up, but soon shut off again. I had the fuel pump replaced. The fuel filter is new as well as the coolant valve. Other than that, when I remove the gas cap, there is usually no air release. Also, when I fill the gas tank at the station, it won't fill it properly, as it reports as being full. What could be causing these issues?

Hello. A bad cam position sensor will cause a Check Engine Light to come on and possibly cause a stall or no start condition for your 2000 Mercury Mystique. Cam position sensors usually develop their problems when hot, so this is likely why you don’t experience any issues during the colder months. The gas tank not filling up properly could be due to a clogged EVAP system. A clogged EVAP system can also cause a Check Engine Light. I suggest that you have a technician inspect the EVAP system of the gas tank for clogging, as well as check other systems, in order to diagnose your stalling issue. Also, have the technician retrieve codes for the Check Engine Light and monitor the live data of the EVAP system and cam position sensor.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Check engine light on.

The testing you did using the CIL may not have been done correctly. During these tests you will need to cycle the clutch and accelerate the engine when the separator codes were received. This is done with a superstar 2...

P0505 code Idle Air Control for bmw 540i

The TPS can have between 5 and 10 different codes and all will be caused by different failures of the TPS, Throttle body, wiring or computer issues and you will need to supply the code you get to help you...

Hi temp low oil and low oil pressure warnings come on

Hello. The warning lights that are coming on can be caused by a few different things. If all three have come on at the same time then it is very likely that the oil has run low. Aside from causing...

Related articles

P0192 OBD-II Trouble Code: Fuel Rail Pressure Sensor Circuit Low Input
P0192 trouble code definition Fuel rail pressure sensor circuit low input What the P0192 code means The power control module (PCM) has...
P0813 OBD-II Trouble Code: Reverse Output Circuit Malfunction
P0813 P0813 code definition P0813 is the fault code for the Reverse Output Circuit. What the P0813 code means This is the generic OBD-II fault code indicating an issue within the reverse output circuit. When you shift your vehicle into...
P0580 OBD-II Trouble Code: Cruise control Multi-Function Input "A" Circuit Low
P0580 P0580 OBD-II Trouble Code: Cruise control Multi-Function Input "A" Circuit Low Diagnostic Trouble Code (DTC): P0580 P0580 code definition A P0580 code means that the PCM has found an electrical problem with the multi-function input circuit in the vehicle’s...