Infinitis Needing to Turn On the Dark

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AUDI hybrids that won't go into electric mode and O-rings found lying in Mini oil pans are among the mechanical maladies covered in the latest technical service bulletins.

The bulletins, compiled by alldatapro.com, offer automakers' insights into some recurring problems with various models. The bulletins, known as T.S.B.'s, are not recalls; they are information provided by manufacturers to dealers' service departments and mechanics.

Unless otherwise noted, the carmakers do not offer payment assistance for these repairs beyond normal warranty coverage. Alldata.com sells a more comprehensive version of the bulletins to consumers. Here are some recent examples:

ACURA A cold-start rattle may shake some TSX owners awake. In T.S.B. 10-024 issued on Oct. 6, Acura's parent company, Honda, said the noise in 2009 and some 2010 models with the 4-cylinder engine might be caused by a faulty actuator for the variable valve timing. The owner's mechanic will become intimately familiar with the TSX engine during a 50-step process of taking most of it apart and putting it back together to replace the part.

AUDI Some Q5 Hybrids may not be taking advantage of their hybrid systems. In T.S.B. 241246 issued on Oct. 10, Audi said some 2013 models might not switch into electric mode at all, even when the high-voltage battery was fully charged. Dealers can reprogram the control computer to get the silent mode back in operation.

DODGE Some 2011 Challengers may have a problem with the smart-glass switches. In T.S.B. M24 issued on Oct. 19, the parent company, Chrysler, said the switches, which control the automatic up-down function of the door windows, may operate when not intended, resulting in a battery drain. Chrysler will replace the switches without charge.

GENERAL MOTORS Some hybrid models may have an incorrect transmission O-ring seal. In T.S.B. 12222A issued on Sept. 28, the company said the problem in the 2012-13 Buick Regal and 2013 Buick LaCrosse and Chevrolet Malibu eAssist models might result in sluggish shifting or requiring high engine speeds to engage Drive or Reverse. Replacing the transmission fluid pump O-ring should smooth things out.

Also several S.U.V.'s with V-8 engines may be getting an extended warranty on the throttle position sensor. In T.S.B. 11273 issued on Sept. 20, the company said the problem might cause the check-engine light to illuminate and the vehicle to run rough. The part will be warranted for 10 years or 120,000 miles, up from the standard coverage of five years or 100,000 miles. The trouble may appear in some 2008-9 Chevrolet TrailBlazers, GMC Envoys and Hummer H2s; 2008-10 Cadillac Escalades, Chevrolet Avalanches, Expresses, Silverados, Suburbans and Tahoes; GMC Savanas, Sierras, Yukons and Yukon XLs; Hummer H3s; and 2009-10 Chevrolet Colorados, GMC Canyons and Hummer H3Ts.

INFINITI Some 2013 JX35 owners may be puzzled by interior lights that turn themselves on and off. In T.S.B. 12-065 issued on Oct. 3, Infiniti said the flickering or illuminating of dome lights when the doors were not open was probably caused by an incorrectly routed wiring harness. Rerouting the harness should keep the lights from shining on their own.

JAGUAR Some 2012 XKs may have a rear right-side fog light that doesn't light. In T.S.B. K128 issued on Sept. 25, Jaguar said the problem could be fixed by replacing the fog light assembly.

MINI Oil changes in Minis may become a bit more complicated. In T.S.B. M110612 issued on Oct. 1, Mini's parent company, BMW, said that technicians might find an O-ring in the oil filter housing when changing the oil. The O-ring is from the oil filter nonreturn valve inside the engine, and it dislodges because it is too small. BMW said that no further engine damage was caused by the O-ring, and that replacing the oil filter housing should clear up the issue. The problem can occur in 2006-12 Hardtops, 2009-12 Convertibles and all years through 2012 of the Coupe, Roadster and Countryman.

Also, some 2010-11 models may have oil leaking from the timing chain tensioner. In T.S.B. M110512 issued on Sept. 1, BMW said the problem in the Hardtop, Convertible, Clubman and Countryman models resulted from a timing chain tensioner seal ring that is too soft. Replacing the seal ring should do the trick.

NISSAN Some 2013 Nissan Altima owners may notice a drumming from the right strut tower when making a turn at 15 m.p.h. In T.S.B. 12-090 issued on Oct. 8, Nissan said the noise was caused by a problem with the right front strut coil spring. Replacing the spring should limit percussion to the infotainment center.

VOLVO Some models may leak oil from an unused bolt hole in the engine. In T.S.B. TJ26765 issued on Oct. 2, Volvo said the trouble in 2012-13 S60 models was caused by an unused bolt hole. Sealing the hole with a proper bolt should stop the drip.

autonews

This article originally appeared in The New York Times.


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