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Re: Cruise control stopped working, gas petal, not...
Run the fault codes
cruise control problems can include clutch and brake sensor
VSS sensor
ECM problems
reading the fault codes will point you in the right direction for the fix
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You have a vacuum leak check under the hood for a black plastic bulb that has a small vacuum hose and a small linkage going to the throttle body. That small hoe probably bad.
Your dealership should have seen any underlying codes. Most Cruise controls I've worked on are used on the vehicles vacuum. that is where i would start, because on a grade your engine uses more vacuum pressure thus taking from some where else.
It could be something a simple as the cruise control switch(s)... or it could be the Cruise Control Module located in the engine compartment. There's also a 'clock spring' in the circuit between the steering wheel & the cruise module. Note: there are two sets of contacts in the brake lamp switch, one set for the brake lights, the other for cruise control. Properly diagnose the 'CAUSE' of the problem. Otherwise you could end up buying parts you don't need. Proper diagnosis is a 'hands-on' activity, which is nearly impossible to achieve here under the FixYa website
check brake switch under dash above the brake pedal. See if sensing wires are broken . or if it uses a duplicate switch sensor check it is engaging properly. Also check you tube on possible failures.
Also in the engine bay the cable from the accelerator petal will attach to the trottle on the engine. Check for another cable at this location from the cruise control and check the cable is not broken .
Check brake globes are functioning and are not blown as well.
It is safe to drive your car. What happened was you have a Check engine light on indicating a problem with the emission diagnostic system. This also makes your cruise not work, and the light to blink. Take your car to your dealer at your convienence and have them diagnose it.
I have had the same problem but not from the oil change but a dodgy batch of fuel, try filling up with some good quality Premium fuel and the light should go out and the cruise light will stop flashing
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