Q: 1999 ford expedition, replaced turn signal switch, now the rear hazards flash all the time

A few different parts can cause this problem. The ignition switch (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-ignition-switch) or key cylinder (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-ignition-lock-cylinder) are most likely. Another possible cause is the security module. In any of these cases, hot wiring the car is not recommended as it...

You definitely have a misfire (https://www.yourmechanic.com/article/how-can-problems-with-the-ignition-system-cause-misfiring_2). It sounds like the misfire gets worse under load, which is why the Check Engine Light starts blinking. This indicates the catalytic converter (https://www.yourmechanic.com/services/catalytic-converter-replacement) is being damaged. A misfire under load is usually caused...

Hello, thanks for writing in about your 2013 Chevrolet Sonic. The downstream O2 sensor is always mounted after the catalytic converter or on the back side of it. If you'd like some help wit this, consider YourMechanic, as one of...

Hi there. It is possible that the camshaft gear has sheered off the camshaft and will not turn the distributor shaft. Remove the timing cover and turn the crankshaft and watch the timing chain turn the camshaft. If the distributor...

Hello - there are a couple of possible problems here: the thermostat may not be working properly, or the coolant temperature sensor (https://www.yourmechanic.com/question/temp-gauge-goes-up-and-down) for the gauge is not working correctly. A malfunctioning thermostat could allow enough engine heat for heater...

Items like brake pads, slave cylinder, and water pump I would look at as normal wear and tear items, as I would the bushings. headlights and markers can be looked it in two ways. 1 - They WERE replaced due...

No Bus refers to the data bus by which the computer (ECM) in the vehicle communicate with each other and with the various components which they read and control. There could be a broken wire, a corroded or loose connection,...

Hi Karon. Thanks for contacting us tonight. 116,000 miles for any vehicle that is less than six-years-old is quite a bit. However, as long as it has been properly serviced, not involved in accidents or driven exceptionally hard, it could...

Confirm that the engine immobilizer system (security system) is not activated thus preventing the car from starting. If the immobilizer system is on, you may see a security warning light. If the warning light is on, to temporarily override the...