GROUP: Vehicle Performance
DATE: August 12, 2011
Flash: MIL Illumination And/Or Bump Jerk Feeling
|2008 - 2010||(MK)||Compass/Patriot (Mexico Markets Only)|
|2008 - 2010||(PM)||Caliber (Mexico Markets Only)|
NOTE: This bulletin applies to vehicles equipped with a 1.8L, 2.0L or 2.4L engine (sales code EBA or ECN or ED3) with export emissions (sales code NA1).
The customer may experience a MIL illumination. Upon further investigation the
Technician may find Diagnostic Trouble Code (DTC) P0129 - Barometric Pressure Out Of Range Low active or stored. 1.8L, 2.0L or 2.4L engines
The customer could also report a firm brake pedal feel. This condition could happen if the vehicle is started at altitudes of 3000 meters (9000 feet) or higher. The software was changed to equalize manifold pressure while cranking the engine during these conditions. 1.8L, 2.0L or 2.4L engines
The customer could also report a bump or jerking feeling under the following conditions for 2.0L or 2.4L engines with an automatic transmission:
- Vehicle is traveling between 25 MPH (40 KPH) to 30 MPH (48 KPH) and the driver lifts their foot of the accelerator pedal. The condition could happen again as the vehicle slows down to 15 MPH (24 KPH) with the no accelerator input a second bump may be felt.
- Vehicle coasting between 3 MPH (4 KPH) and 15 MPH (24 KPH) with no accelerator pedal input and the driver steps on the accelerator pedal a bump or jerking feeling may be felt.
Updating the software will correct the conditions listed above.