Problem: ESP system may prematurely activate momentarily when negotiating a curve or MIL illumination due to diagnostic trouble code P0340, P0344 or P0116.
Overview: This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software.
2007 Ram Truck
2005-2007 Grand Cherokee
Note: This bulletin applies to vehicles equipped with a 3.7L, 4.7L or 5.7L engine (sales code EKG, EVA, EVD, EZB or EZA). This bulletin also applies to the DR vehicles equipped with a 5.7L engine.
Conditions: The customer may experience a premature and momentary activation of the Electronic Stability Program (ESP) system. The premature activation of the ESP system may or may not be accompanied with the illumination of the ESP indicator lamp located in the instrument cluster. The customer may experience the momentary ESP system activation on a clover leaf-type turn, at speeds of approximately 25 to 40 MPH (40 to 64 KPH). This could also be described as a lack of throttle response or hesitation. Driving over speed bumps at a slight angle can also cause the same ESP event accompanied by lack of throttle response. The customer may also complain of low idle speed.
The following Diagnostic
Trouble Codes may be set:
- P0340 – Camshaft Position Sensor Circuit – Bank 1 Sensor 1
- P0344 – Camshaft Position Sensor Intermittent – Bank 1 Sensor 1
iii. P0116 – Engine Coolant Temperature Sensor Performance
Diagnosis: Using a Scan Tool with the appropriate diagnostic procedures available in TechCONNECT, verify all engine systems are functioning as designed. If other DTCs are present, record them on the repair order and repair as necessary before proceeding further with this bulletin.
If the vehicle operator describes or experiences the Symptom/Condition, perform the Repair Procedure. If the PCM software is up to date and the above-mentioned DTCs are present, then further diagnosis is required.
Solution: Reflash the vehicle with the latest software.
Courtesy of ALLDATA.