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Car Problems

RepairPal has identified the most common car problems based on complaints from actual vehicle owners. We'll tell you what the problem is and what it'll take to fix it.

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Known Problems

If the engine does not crank (or cranks but won't start), the wireless control module (WCM) may have locked up. This is due to static discharge through the ignition key. A revised model should be installed, but simply disconnecting the negative terminal of the battery for thirty seconds will temporarily reset the module so you can start the car.

The outside door handles are prone to breaking—all doors are affected by this condition.

The Mercury Milan from 2005-2010 is known to have issues with hard shifts and transmission slippage on models equipped with the six speed automatic transmission. When the transmission gets warm, the issues is most noticeable as a hesitation to shift, followed by jerking or jolting into the next gear.

The hard shifting and transmission slipping is commonly a result of software inadequacies, which do not account for all variables as the transmission heats to normal operating conditions. In some cases, the automatic transmission may be suffering from a damaged valve body or faulty shift solenoids.

 

Software updates from the manufacturer of this transmission have solved many reported complaints, but not all. In cases where software updates to the transmission controller have failed, the transmission will likely need valve body replacement, shift solenoid testing and replacement, or even a complete rebuild.

Since the transmission is sealed for life, the fluid is not normally considered a suspected cause, but many technicians recommend changing the transmission specific automatic transmission fluid at normal intervals. 

Leaks at the front and/or rear differential pinion seal and from the transfer case are common. Leakage from the transfer case normally occurs at the case-mating surfaces and require removal of the transfer case to reseal.

Shifting harshness and shuddering issues related to the operation of the automatic transmission have been addressed by factory service bulletins. The shuddering can feel like the vehicle is being driven over rumble strips.

A vibration or shutter may be noted on acceleration. If the transmission torque converter is suspected a revised part is available to correct this concern.

Wear on the rear axle shafts near the bearings can create excessive play and lead to gear oil leaking past the seals. Gear oil will leak onto the brake backing plate, brakes, and wheels.

Models with electric sliding doors can develop problems with the door mechanism. The cable in the door becomes frayed, which will damage the electric motor.

The inside and outside door handles are prone to breaking.

There have been problems with the climate control system not working at times. Volvo has made a Software upgrade for the AC control module is available that can correct certain climate control system faults.

The 3.7L V6 and 4.7L V8 in very cold climates (below freezing temperatures) moisture can collect in the Positive Crankcase Ventilation (PCV) system and freeze. This will cause various drivability problems and there are revised PCV system components to repair this concern.

Vehicles with a 6speed automatic transmission may develop one or more of the following faults related to a broken 35R clutch wave plate inside the transmission: Illumination of the Check Engine Light with code P0716, P0776, P0717, P0777, P2714, P2715, and/or P02723, loss of reverse gear, slipping or harsh 3rd or 5th gear shift. Removal and dis-assembly of the transmission will be required to replace the broken 35R wave plate. It is also extremely important that all debris from the failed part be cleaned from the transmission while it is disassembled in order to try and prevent future problems.

Water leaks may be noted from the front and/or rear roof area. Our technicians recommend to inspect the roof ditch and sunroof - Check all grommets and plugs, reseal roof seams, and replace the sunroof drain tubes if necessary.

V6 engines may experience surging while driving. The condition is more noticeable between 40 and 50 MPH while accelerating up a hill/slight incline. Replacing the powertrain control module (PCM) and updating the transmission control module (TCM) software may be required.

The evaporator temperature sensor can fail, causing the AC compressor not to cycle. If the AC compressor does not turn on, the AC system will not blow cold air. If the compressor is stuck on, the air will be very cold at first, before warming up.

Headlight switches can fail, causing the headlights to intermittently stay in the on or off position. Repeatedly turning the switch on and off may temporarily fix the problem. Replacement of the switch is needed to resolve this issue. 

The high-pressure power steering lines are known to leak.

The 4WD transfer case encoder motor position sensor or the selector switch may fail causing the service 4WD message to be displayed. Fault code(s) stored in the transfer case control module will be of assistance in determining the exact fault causing the message to be displayed.

A droning type noise may be noted when the air conditioning system is operating. Additionally, a vibration may be felt in the steering wheel. If these issues are no longer present when the AC system is turned off, the problem may be low refrigerant charge in the system. Our technicians remind us that if the refrigerant charge is found to be low, proper leak diagnoses should be performed in addition to recharging the AC system.

Various radio performance concerns may develop including noisy operation, no operation, or SYNC issues. Reprogramming the appropriate module with updated software will commonly correct most of these issues.

The Check Engine Light may illuminate indicating a primary ignition signal fault. Many times the cause is an ignition coil(s) that has failed. The problem in the coil causes the spark energy to feedback through the wiring harness into the other coils. If this is not repaired, it can damage the other coils (blistering on the coils may be seen).

The HVAC blower motor may stop working at one or more speeds due to a faulty blower motor resistor block. Our technicians recommend to confirm the resistor is at fault by first checking the operation of the switch.

Leaks at the front and/or rear differential pinion seal and from the transfer case are common. Low fluid level in the differential or transfer case can result in bearing failure. Damaged bearings commonly cause a whine or growl type noise.

The 2004-2014 Chevrolet Express 1500 has known issues with the EVAP system, a part of your emission control system.

The EVAP canister vent valve or valve solenoid wiring may fail causing illumination of the check engine light, setting code P0446, and problems filling the tank with fuel.

To correct the issue, the EVAP canister vent valve, solenoid, and wiring must be inspected. The most common fix is replacement of the wiring connector or replacement of the vent valve assembly.

A well-documented and well-known issue with the Mazda 6 built between 2005-2012 is harsh shifting from the 6-speed automatic transmission, and slight slippage between gears. This has been noted as hesitation to accelerate, especially from a stop.

Mainly, software issues have been to blame for these mishaps, but mechanical malfunctions related to shift solenoids and the valve body have also been major causes. Finally, the automatic transmissions in these models are sold as ‘sealed for life’, yet the transmission fluid does not seem to last the complete service life of the vehicle.

Correction of these issues often requires a simple software update, meaning the vehicle only needs to be plugged in, and the transmission controller receives new programming meant to fix these drivability concerns. In cases where this does not correct concerns, the transmission must be removed, inspected, and repaired, possibly requiring a complete rebuild.

To mitigate these issues from escalating to a full transmission rebuild, many technicians recommend replacing the transmission fluid at regular intervals, yet the manufacturer has never offered this guidance. 

The AC/heater (HVAC) system may unexpectedly switch to the defrost mode when accelerating. This system is operated by engine vacuum and should be inspected for any vacuum leaks if this problem develops.  There is also a revised vacuum check valve available to address this concern.