Vehicle Troubleshooting Guide

A check engine light means the vehicle computer detected a fault. Causes can include ignition, fuel, emissions, or sensor problems. If it flashes or the vehicle runs poorly, reduce driving and have Thompson's T-Express diagnose it promptly.

An intermittent light may be related to a loose connection, changing operating conditions, or a fault that appears only at certain temperatures or loads. Thompson's T-Express can scan stored codes and test the affected system.

Intermittent starting trouble can come from the battery, starter, wiring, fuel delivery, ignition, or a sensor. Note when it happens and bring those details to Thompson's T-Express for testing.

Rough running can result from worn spark plugs, ignition problems, vacuum leaks, fuel-delivery issues, or mechanical faults. Thompson's T-Express can test the vehicle instead of replacing parts based on symptoms alone.

Stalling may involve the charging system, idle control, fuel delivery, sensors, or an engine-management fault. Avoid driving if the vehicle may stall in traffic and ask Thompson's T-Express for diagnostic service.

Follow the vehicle's maintenance reminder or manufacturer interval and check oil level regularly. Severe use and short trips can affect timing. Thompson's T-Express can review the appropriate interval for the vehicle.

A maintenance reminder usually indicates a scheduled service interval rather than a specific failure. Thompson's T-Express can review mileage, service history, and manufacturer recommendations before resetting it.

Low tire pressure, overdue maintenance, sensor faults, brake drag, driving conditions, or engine problems can reduce fuel economy. Thompson's T-Express can inspect the vehicle and prioritize confirmed causes.

Check tires, fluids, belts, brakes, lights, battery condition, and overdue maintenance before traveling. Schedule the inspection early enough for Thompson's T-Express to address any findings before departure.

A dirty cabin filter, moisture, debris, or HVAC contamination may cause odors. Thompson's T-Express can inspect the filter and system and recommend appropriate service.

Squeaking can have several causes, while grinding may indicate severe pad wear or metal contact. Limit driving when braking performance changes and have Thompson's T-Express inspect the brakes promptly.

A soft pedal may involve air or moisture in the hydraulic system, a leak, worn components, or a master-cylinder problem. Because braking can be affected, arrange inspection with Thompson's T-Express before driving farther.

Pulling during braking may be caused by uneven brake operation, tire issues, suspension wear, or alignment problems. Thompson's T-Express can inspect the complete system to identify the cause.

Steering-wheel vibration can come from tire balance, wheel or tire damage, brake problems, worn suspension parts, or alignment concerns. Thompson's T-Express can reproduce the symptom and inspect the related components.

Worn shocks or struts, damaged springs, loose steering or suspension parts, or tire problems can affect stability. Slow down if control feels uncertain and have Thompson's T-Express inspect the vehicle.

Overheating can result from low coolant, leaks, thermostat or water-pump problems, cooling-fan faults, or internal engine issues. Shut the engine off safely and do not open a hot cooling system; contact Thompson's T-Express for help.

Coolant may leak from a hose, radiator, water pump, reservoir, gasket, or another cooling-system component. Avoid driving an overheating vehicle and let Thompson's T-Express pressure-test the system.

Oil leaks can come from seals, gaskets, filters, drain plugs, or damaged components. Check the oil level and have Thompson's T-Express locate the source before low oil causes engine damage.

Smoke or steam can come from overheated coolant, leaking oil, an electrical problem, or fluid reaching a hot surface. Stop safely, shut the vehicle off, and arrange inspection or towing to Thompson's T-Express.

Engine noises can involve low oil, valvetrain wear, combustion problems, accessories, or internal damage. Check the oil level and have Thompson's T-Express inspect persistent or worsening noise promptly.

A weak battery, charging fault, electrical draw, loose connection, or frequent short trips can leave the battery discharged. Thompson's T-Express can test the battery, alternator, cables, and parasitic draw.

Clicking can indicate a weak battery, poor connection, starter problem, or another electrical fault. Thompson's T-Express can test the starting and charging systems before parts are replaced.

Flickering lights may point to charging-system trouble, wiring damage, loose grounds, or failing electrical components. Thompson's T-Express can measure system voltage and inspect connections.

Warm air can be caused by low refrigerant, leaks, compressor or electrical faults, blend-door problems, or restricted airflow. Thompson's T-Express can test the system and identify the needed repair.

A heater may stay cold because of low coolant, thermostat trouble, a restricted heater core, airflow controls, or cooling-system problems. Thompson's T-Express can inspect both the heating and cooling systems.

Slipping can relate to low or degraded fluid, hydraulic or electrical faults, worn internal components, or control problems. Avoid heavy driving and ask Thompson's T-Express to diagnose the condition.

Harsh shifting may involve fluid condition, solenoids, sensors, software, mounts, or internal wear. Thompson's T-Express can scan transmission data and perform appropriate tests.

Transmission fluid can leak from seals, cooler lines, the pan, gaskets, or damaged components. Check the fluid level only as the manufacturer directs and have Thompson's T-Express find the source.

Delayed engagement can be related to fluid level, hydraulic pressure, electronic controls, or internal wear. Thompson's T-Express can diagnose the symptom and explain available service options.

Whining or humming may come from the transmission, differential, wheel bearings, tires, or accessories. Thompson's T-Express can road-test the vehicle and isolate the noise.

Repeated air loss can come from a puncture, valve, wheel corrosion, bead leak, or tire damage. Thompson's T-Express can inspect the tire and wheel and determine whether repair is safe.

The light may indicate low pressure, temperature-related pressure change, a puncture, or a TPMS sensor fault. Check pressures when the tires are cold and have Thompson's T-Express inspect persistent warnings.

Uneven wear can result from alignment, inflation, rotation, balance, worn suspension parts, or driving conditions. Thompson's T-Express can inspect the tires and related systems.

Highway-speed vibration often involves tire balance, wheel damage, tire defects, driveline concerns, or worn suspension parts. Thompson's T-Express can inspect and road-test the vehicle.

Replace tires when tread is worn to the legal or safe limit, damage is present, age is excessive, or traction is no longer dependable. Thompson's T-Express can inspect tread, age, and condition.

Stop the engine as soon as it is safe. Low oil pressure can quickly damage an engine. Check the oil level only when safe and arrange towing to Thompson's T-Express if the warning remains.

A flashing check engine light can indicate a severe misfire that may damage the catalytic converter. Reduce power, stop safely, and contact Thompson's T-Express about towing or immediate diagnosis.

Move to a safe location, use hazard lights, and avoid repeated starting attempts if there is smoke, heat, or electrical odor. Call Thompson's T-Express to discuss towing and repair arrangements.

Yes. Continuing to drive an overheating vehicle can cause major engine damage. Shut it off safely, allow it to cool without opening the hot system, and arrange towing to Thompson's T-Express.

Yes. Thompson's T-Express can help arrange towing to the shop. Call (218) 722-0005 with the vehicle location, condition, and destination details.