Technical Service Bulletins

Fixing a shifting click

Fixing a shifting click

Some customers may complain about a clicking type noise from the front of the vehicle when shifting between reverse and drive, or during hard acceleration.
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EVAP small leak DTC P0442

The following diagnosis might be helpful if the vehicle exhibits a P0442 DTC, but a system leak cannot be verified through system testing instructions listed in the service manual. The difficulty in determining the cause of the EVAP leak results in improper repairs and customers returning for the same issue.
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Coolant crossover leak

Coolant crossover leak

Engine coolant leaks detected on some GM vehicles may be the result of leaking gaskets between the coolant crossover pipe and the front of the right cylinder head.
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Hyundai CVVT oil control valve

Hyundai CVVT oil control valve

When diagnosing the Continuously Variable Valve Timing (CVVT) system for rough idling, poor acceleration, camshaft timing misalignment-related trouble codes, misfire-related trouble codes and/or other related symptoms, it may be required to inspect the Oil Control Valve (OCV) for proper operation.
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Mazda reports on broken TPMS caps

Mazda reports on broken TPMS caps

Mazda reports that some vehicles may experience breakage of the aluminum valve stem on TPMS units when removing aftermarket valve stem caps during routine procedures such as checking tire air pressure.
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Volvo advisory remedies harsh ride

Volvo advisory remedies harsh ride

Volvo advises that the front suspension on 2010 models S80, V70 and XC70 may feature a harsh ride in cold climates when driving on uneven roads or bumps when the ambient temperature is 5 degrees Fahrenheit or colder.
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LS engine block porosity causes oil leak

LS engine block porosity causes oil leak

Concern: Engine oil leak on GM 5.3, 5.7, 6.0, 6.2 and 7.0L engines (Vortec Gen III or Gen IV V8, aluminum block). Upon initial diagnosis, it may be determined that the leak is coming from the rear engine cover gasket. However, this condition may be caused by engine block porosity on the sealing surface. This bulletin applies only to engines that feature an aluminum block.
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First response: Infiniti ECM power supply DTC

First response: Infiniti ECM power supply DTC

If you have an Infiniti vehicle with the MIL light on that has a DTC P0603 stored in the ECM, perform the diagnostic steps in this bulletin FIRST. This DTC may have been stored due to a series of previous low battery voltage, dead battery or battery terminal disconnections.
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