What people keep running into with car repair
Complaints tagged car repair, each raised by more than one person. One-off posts are not included.
155 recurring problems · 1361 people · 21 forums we read
Raised more than once
Most people first.
- 3How to identify a mystery liquid leaked inside my carUnknown puddles or fluid spray inside a vehicle cabin often stem from failing heater cores, clogged A/C evaporator drains, or compromised power steering lines. These leaks leave car owners trying to identify strange colored fluids to anticipate expensive repair bills and avoid unnecessary mechanic visits.
- 3Lights flickering when the AC turns onCompressor assist devices often fail to stop lights from dimming when an air conditioner starts up, leaving homeowners worried about safety and old wiring. This sudden power draw causes lights to flicker for a few seconds every time the HVAC unit kicks on, even after expensive repairs.
- 3Red coolant warning light turning on while idlingA red coolant warning light often illuminates during idling because restricted airflow or a failing cooling fan prevents proper heat dissipation while the car is stopped. This causes engine temperature to spike temporarily until driving resumes and airflow increases, though it can also point to underlying blockages or failing components.
- 3Dealership won't fix intermittent issue under warrantyDealerships often refuse warranty repairs when an intermittent problem fails to replicate on-site, even if diagnostic codes are stored in the vehicle's system. This leaves owners stuck wondering what steps to take next, unsure whether to try a different brand-certified dealer or how to secure third-party warranty approval without active symptoms.
- 3Having second thoughts after paying a wedding vendor depositPaying a non-refundable retainer locks couples into a vendor before they have fully weighed their options or read subsequent reviews. This sudden doubt leaves them anxious about losing thousands of dollars or being stuck with unreliable service right before the wedding.
- 3Why does my outside AC unit keep running when turned off?When an outdoor unit continues running despite being turned off at the thermostat, a failed or stuck contactor is usually to blame. Because power remains bridged, the only way to stop the system is by manually flipping the exterior switch or breaker.
- 3Flat tire again right after getting it replacedShop repairs or replacements sometimes fail immediately due to new punctures, debris in the work area, or improper installation. Dealing with a second flat so quickly drains limited funds and forces people to pay unexpected diagnostic or repair fees all over again.
- 3Why is my battery light still on after replacing the battery?The battery warning light can remain illuminated after a replacement due to hidden charging system issues, such as a failing alternator or compromised terminal connections. This prevents the electrical system from charging properly and triggers persistent dashboard errors.
- 3Catalytic converter clogged without check engine lightA catalytic converter can fail and severely restrict exhaust flow without triggering a malfunction indicator lamp, leading to gradual power loss and an inability to climb hills. Because diagnostic trouble codes do not always appear, drivers struggle to confirm whether the restriction is actually inside the exhaust system.
- 3Is it safe to drive with a noisy AC compressor pulley?A noisy or squealing AC compressor pulley with play risks seizing up and destroying the serpentine belt and surrounding components. This sudden noise leaves drivers unsure whether the play is normal, whether to replace just the moving part or the entire assembly, and if they can safely keep driving.
- 3Why does my car AC stop working when it's really hot outside?The air conditioning compressor repeatedly clicks on and off without cooling when ambient temperatures exceed extreme heat thresholds. This thermal overload prevents the system from maintaining cold airflow during peak heatwaves.
- 3Dead clutch pedal and won't bleed hydraulic fluidA failing hydraulic clutch system can cause a dead pedal that refuses to build pressure or pull fluid from the master cylinder reservoir. This prevents the system from bleeding properly, leaving you stranded with a clutch that cannot be engaged or fixed through standard bleeding methods.
- 3Car radio screen works but no soundAn infotainment system can experience total audio failure while other functions like the backup camera continue operating normally. This unexpected software or hardware glitch cuts off all sound output from the vehicle's speakers, forcing owners to hunt for hidden electrical faults or face costly dealership diagnostics.
- 3Why are my front brake pads wearing unevenly?Uneven brake pad wear usually stems from a stuck sliding pin, a seized caliper piston, or a restricted brake hose that prevents proper pressure release. This imbalance causes the pads to drag continuously, leading to rapid wear on one side and potential steering pull.
- 3Why do ignition coils keep failing one after another?Ignition coils and spark plugs wear down at similar rates, so when one fails, the others are usually close behind. Replacing them individually leaves older components in place, which frequently leads to repeat breakdowns and leaves drivers stranded again shortly after the first repair.
- 3Why is my car suspension popping after replacing struts and springs?Suspension popping noises after installing new parts like struts and springs are often caused by improper installation, components not being torqued correctly under load, or binding parts. This leaves drivers dealing with intermittent knocking or popping sounds when turning or driving at different speeds.
- 3Drove several miles with a snapped serpentine belt, did I ruin my engine?Driving with a snapped serpentine belt cuts off crucial functions like the water pump and alternator, risking severe overheating depending on how far and how long you drove. To verify if damage occurred, check your temperature gauge history and inspect the engine for signs of overheating or coolant leaks.
- 3How to fix a coolant leak and sludge in an old carLow coolant levels and sludge buildup typically indicate oil mixing with the coolant, often caused by a failing head gasket or oil cooler. Trying to fix a leak with temporary tape or sealants on an older vehicle will not resolve underlying mechanical failures and can lead to complete engine overheating.
- 3How to diagnose EVAP error codes without replacing parts blindlyEvaporative emission system issues often cause symptoms like engine sputtering and stalling that mimic other problems, leading people to waste money replacing parts like purge valves at random. The core difficulty is narrowing down the exact root cause—such as a failing gas cap, blocked purge valve, or charcoal-clogged evap canister—without specialized diagnostic equipment. This forces drivers to rely on trial-and-error fixes that fail to resolve the underlying fault.
- 3Smoke and oil leaking from engine bay after drivingOil leaking from components like the power steering rack and pinion can drip onto hot exhaust parts, causing smoke to billow from the engine bay. This leaves drivers worried and uncertain about what is causing the issue or how to diagnose it safely.
Comes up alongside
Topics that keep appearing on the same problems — not topics with similar names.