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TECHNICAL SERVICE BULLETINS
from Auto Service Professional - February 2021
by EndeavorBusinessMedia-VehicleRepairGroup
TeChnICal ServICe bulleTInS
Information courtesy of Mitchell 1
MAZDA
LOW-SPEED SURGE
Some 2019-2020 Mazda3 and CX-5 owners may complain about surging at low speeds. This condition may be caused by torque uctuation and torsional resonance in the torque convertor.
DODGE
EASY RAM FIX
This bulletin applies to 2019 RAM ProMaster City vehicles equipped with a 2.4L Multiair engine. The MIL may be on and you may nd DTC P018C (fuel pressure sensor circuit low). This applies to vehicles built on or after August3, 2018, and on or before Aug, 13, 2018.
This may require replacement of the fuel pressure sensor and line. The combination fuel pressure sensor and line is available as a single unit. Sensor or line are not available separately.
The assembly is available as P/N 68338428AA. Replacement time should be about a half-hour. ACURA
ACURA RDX ROUGH IDLE
Have a rough idle on a 2019 Acura RDX? Before you waste time inspecting and diagnosing, the engine idle may simply be set too low. Acura recommends updating the PGM-FI software using version 1.004.060 or later.
PORSCHE
GENERATOR MALFUNCTION
This bulletin applies to 2007 and later Porsche Boxter, Cayman and Carrera vehicles. As of 2007, these cars’ generators must be evaluated as functioning correctly. The DME controller temperature should always be checked before measuring voltage and must be at a maximum of 135 degrees Celsius. If this temperature is exceeded, an incorrect measured voltage value will be determined. Electrical generator faults will be stored as fault codes in the DME control unit. BMW
ROTOR RESURFACING
Technicians might not be able to resurface brake rotors on certain 2018-2020 BMW G12, G14 and G15 models using ProCut PRM9.2 or X9 brake lathes. An upgraded lathe package, including a modi ed gearbox, is now available to address the issue.
CHEVROLET
SPARK TRANSMISSION FIX
This bulletin applies to 2014-2019 Chevy Sparks equipped with CVY7 automatic transmissions that may underperform. This condition may be caused by the transmission uid pressure switch being contaminated with debris coming from the valve body. Clear the codes and road test the vehicle. If DTCs do not reset, no repairs are necessary. If DTCs do set, replace the uid pressure switch.
CADILLAC
SHIFT PADDLE PROBLEM
This bulletin applies to 2013-2019 Cadillac ATS, 2009-2015 CTS VIN D, 2014-2019 CTS Sedan VIN A and 2013-2019 XTS models. If shift paddle replacement is necessary, the steering wheel does not need to be replaced nor does it need to be removed.
BMW
MYSTERY WIPERS
This bulletin applies to BMW vehicles produced from March 1, 2015, to June 2019. This includes 2 Series, 3 Series and 4 Series vehicles. The windshield wipers may switch on by themselves and can no longer be switched o despite activation of the switch, due to an internal software error in the SZL (steering column switch cluster). The correction involves replacement of the SZL. The SZL does not require programming/coding after replacement. FORD
BRAKE DRAG ISSUE
Some 2017-2019 Ford F-Super Duty pickups may exhibit a brake drag problem. Utilize workshop manual dianostics in section 20600 to verify the correct installation of the stop lamp switch.
LINCOLN
CRACKED SKIRT
Some 2015-2017 Lincoln Navigator vehicles equipped with a 3.5L EcoBoost engine with greater than 20,000 miles may exhibit a tick type noise from the cylinder block area. This noise may be caused by a cracked piston skirt.
The noise can be isolated to a cylinder using a stethoscope or other suitable listening device. Cancelling the a ected cylinder will reduce or eliminate the noise. If the noise is isolated to a speci c cylinder, it is recommended to replace the short block. HYUNDAI
OEM OIL ONLY?
Hyundai approves only the ATF and DCT gear oil speci ed in the vehicle owner’s manual. Use of other ATF or gear oil may result in improper shift quality or other drivability conditions. Hyundai does not approve the use of any aftermarket ATF or gear oil additives.
MERCEDES-BENZ
LEAKY SHOCK ABSORBER?
This bulletin applies to 2019 MercedezBenz models 205, 213, 238, 253, 117, 242 and 246 without Air-Matic. Rear axle shocks can appear to be extremely oiled. However, this does not always indicate a leaky shock absorber. The likely cause is residual oil from the shock assembly.
JEEP
JEEP PCM REPROGRAM
This bulletin applies to 2015-2018 Jeep Renegade vehicles equipped with a 1.4L or 2.0L engine. A certain number of these vehicles may inadvertently suspend some required OBD monitors when the P1D7F fault code is set.
These items are MIL-relevant. Inspect the software level of the PCM and, if necessary, reprogram the PCM. The following special tools are required to perform this repair: - NPN wiTECH micro pod II - NPN laptop computer - NPN wiTECH software
CADILLAC
OILY WINDSHIELD
This bulletin applies to 2013-2019 Cadillac ATS, 2016-2019 ATS-V, 2014-2019 CTS Sedan, 2017-2019 XT5, 2013-2019 XTS, 2015-2019 Escalade 2WD and 4WD, 20132019 SRX and 2014-2019 ELR vehicles. Some customers may comment that an oily substance is found on the inside of the windshield surface and appears to be leaking from the rear view mirror area.
The oil/ uid is from the gel pad of the moisture sensor. The uid can separate and leak due to heat loads. The sensor should only leak one time and the leakage will not a ect the performance of the sensor.
Clean the glass surface and sensor bracket with an isopropanol alcohol wipe until the surfaces are clean, then re-install the moisture sensor. Test the sensor by placing the ignition in the run position and rotating the wiper switch intermittent (delay) band fully forward. Once the wipers wipe once, apply water to the outside of the windshield in the area of the sensor with a spray bottle.
After one or two sprays, the wipers should wipe.
JAGUAR
DISCONTINUED SENSOR
Jaguar says that the supplier of its exhaust gas pressure sensors has discontinued its original sensor. When the new sensor, whose P/N is JDE40156, is ordered, the engine harness will need to be changed.
JEEP
STUCK FUEL GAUGE
This bulletin applies to 2020 Jeep Gladiator vehicles. It involves diagnosis and possible replacement of the fuel tank and O-ring due to a P0461 DTC. This bulletin applies to Gladiators built on or after April 12, 2019, and on or before May 6, 2019, and equipped with a 3.6L V6 24V VVT engine. The fuel gauge may not be accurate and/or the gauge may be stuck. Replace the fuel tank, referring to the detailed service procedures available in the DealerCONNECT Service Library. Replacement fuel tanks are available as P/N 68332305AC.
SUBARU
SUBARU SOFTWARE GLITCH
In the interest of customer satisfaction, Subaru is initiating a service program to reprogram the ECM on certain 2019-2020 Ascent and 2020 Legacy and Outback vehicles. In some vehicles, the current software may cause the sub learning value control to operate improperly during the wake-up mode of the ECM. This could cause repeated erroneous learning of the accelerator position, which can result in the disabling of the VDC function.
When the VDC function is disabled, EyeSight, Reverse Automatic Braking (RAB) and Electronic Parking Brake (EPB) auto release functions are disabled by the VDC fail signal, causing the VDC, EyeSight, RAB and EPB warning lights to illuminate. ECM reprogramming will be required.
