Toyota has reported that 2004-07 Prius hybrids may produce a squeaking sound whenever the brake pedal is applied or released. According to the carmaker, the noise is most obvious when the key is in the ready mode and the vehicle not moving, and is likely due to a defective ABS brake actuator. A new-design actuator is available to address the concern.
Before ordering the new actuator, bleed the brake system. If the noise goes away, you're done with the fix. If the noise remains after the bleeding procedure, go ahead and replace the actuator with the upgraded design. Order part No. 44500-47090 for 2004-05 models; or part No. 44500-47140 for 2006-07 vehicles.
Drivers of 2001 2.4-liter Sonatas and Santa Fes may come into your store with a complaint that their engine runs rough and/or has a lumpy idle. In most cases, the check engine light will be illuminated with trouble code P0335 logged in PCM memory.
One likely cause for all these concerns, reported Hyundai, is the exhaust camshaft jumping time. Slack in the timing belt is the ultimate culprit. Installing a new-design upper timing belt cover with a built-in belt guide, part No. 21360-38214-D, should put the drivability issues to rest.
Some 2007 Dodge Calibers with 2.0-liter or 2.4-liter engines and CVT transmissions built from May 11, 2006, through Aug. 16, 2006, may produce a pinging noise under moderate acceleration.
According to Chrysler, the noise usually occurs when the outside temperature is above 60 degrees, and may be accompanied by an illuminated check engine light, with trouble code P2173 and/or P0452 stored in computer memory. Software issues in the PCM are the most likely cause of the trouble. Reprogramming the module with updated software files is the only remedy. Check with a dealer for the specifics of the flash.
"Factory Fixes" is written by Jim DePalma, a 30-year veteran of the auto repair business who has served stints as a service manager, parts manager and ASE-certified technician. His column provides vehicle manufacturers' authentic factory technical service bulletins (TSBs) that have been condensed for easier reading. Mr. DePalma advises that techs always check with a dealer or repair information system for the latest revisions before starting to work on a vehicle. He can be reached via e-mail at [email protected]