Q: the security system was activated and now only runs up to 50mps.

asked by on

So i just purchased this vehicle from my mom friend and she told me that the car runs fine which it does but before i bought it her son had it and he activated the security system in the car which now the car will run only up to 50 mph. I need to know what i need to do to get that fix ? And how much would it roughly cost? and is it something I can do to save on labor cost?
My car has an automatic transmission.

There are a couple of possibilities here. Check fuel pressure while driving the car. If fuel pressure is below spec, or drops the closer you get to 50 mph, then your fuel pump may be worn out, fuel pump relay has burned contacts, a possible clogged fuel filter, or clogged injectors. Check the air filter as well for clogging. If all of these components check out, observe if the engine pulls strongly at lower speeds. If not, have the catalytic converter checked for clogging. Clogged catalytic converters are the result of unburned fuel, oil fumes, or high-sulfur content gasoline leaving the engine. I would recommend an inspection from YourMechanic to diagnose this problem, get an accurate assessment of damage, and cost estimate for repairs. YourMechanic can dispatch a mobile, professional mechanic to your location to handle this inspection.

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
  1. Home
  2. Questions
  3. the security system was activated and now only runs up to 50mps.

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

Q: Stalls when running after 20 min

Hello. It sounds like you have a problem with the security system. This is integrated into the body control module. If the body control module was replaced then it may not have been programmed correctly or it may be defective....

Q: i replaced the cluster and disconnected the battery. when i connected everything again the theft alarm was on and car doesnt start

Hello, thank you for writing in. The first thing we need to determine is if this is a stock alarm or an aftermarket that was installed later. There may be a technical issue with the alarm module itself. The keys...

Q: Code P0222

If you replace the TPS sensor on the throttle body, you do not require reprogramming. I would still disconnect the battery for at least thirty minutes to reset the computer. What concerns me are the other two codes. Unless the...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.