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Jeep TSB #21-029-16
2014 Jeep Grand Cherokee
TSB Document:
Affected Component: ELECTRICAL SYSTEM
- Summary
- Flash: Transmission Shift And Drivability Enhancements Flash: Transmission Shift And Drivability Enhancements Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that the following Diagnostic Trouble Codes (DTCs) have been set: · **P1115 - General Temperature Rationality. · P0441 - EVAP Purge System Performance. · P0456 - EVAP System Small Leak. · P030X - Cylinder x Misfire Detection. · P0335 - Crankshaft Position Sensor Circuit. · P0122 - Throttle Position Sensor 1 Circuit Low. · P0123 - Throttle Position Sensor 1 Circuit High. · P0222 - Throttle Position Sensor 2 Circuit Low. · P0223 - Throttle Position Sensor 2 Circuit High. · P2299 - Brake Pedal Position/Accelerator Pedal Position Incompatible. · P2610 - PCM Internal Engine Off Timer Performance.** · P0171 - Fuel System 1/1 Lean. · P0174 - Fuel System 2/1 Lean. The customer may also notice the following conditions: · False detonation (spark knock) detected during a Wide Open Throttle (WOT) (North American Market Only). · Will not reach max speed (over 256 kph) during freeway driving (International Market Only). · Less than desired upshift quality in Normal or Sport mode. · Shift inhibit while transitioning in/out of MDS mode. · Less than desired downshift quality while coasting with the brake released or while passing. · Vehicle will not display 2nd gear when entering Manual mode from Snow or ECO mode. · High speed gear hunting (shifting back/forth repeatedly between two gears). · Will not exceed 32 kph (20 mph) in reverse. · Less than desired 2nd gear launch quality while in ECO mode. · Unable to launch in 3rd gear in Snow mode in higher altitudes. · Less than desired shift quality durin
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