NHTSA Office of Defects Investigation
Defect Petition DP12-006: Electronic Throttle Body Malfunction
- Closed
NHTSA's Office of Defects Investigation opened Defect Petition DP12-006 on October 2, 2012 and closed it on February 21, 2013, the day it opened Preliminary Evaluation PE13-003, which this investigation's summary cites. NHTSA's investigations file lists 3 Ford models for it.
Updated daily from NHTSA's investigations file
Key facts
- NHTSA number
- DP12-006 (also written DP12006)
- Investigation type
- Defect Petition A petition asking NHTSA to open a defect investigation; NHTSA grants or denies it, and granting one opens an investigation.
- Status
- Closed February 21, 2013
- Opened
- Closed
- Vehicle or equipment manufacturer
- Ford Motor Company
- Component
- Engine
- Vehicles and equipment
- 3 Ford models, including the Escape and Escape Hybrid
A recall appears here only when NHTSA's investigations file links one to the investigation; NHTSA's summary or record can name others.
NHTSA's summary
As NHTSA's Office of Defects Investigation wrote it for Defect Petition DP12-006.
try.vin does not copy NHTSA's investigation documents; NHTSA's investigation record lists the ones NHTSA has published.
In a letter dated August 30, 2012, The North Carolina Consumers Council (NCCC) petitioned the National Highway Traffic Safety Administration (NHTSA) to initiate a defect investigation of alleged electronic throttle body failures resulting in engine stall or surge while driving in model year (MY) 2005 through 2012 Ford Escape vehicles. On October 2, 2012 the Office of Defects Investigation (ODI) opened a Defect Petition DP12-006 to evaluate whether to grant or deny the petition. The petition is hereby granted on certain model years. The NCCC letter cites two complaints of stall while driving in MY 2009 Ford Escape vehicles that were diagnosed as failed throttle bodies with diagnostic trouble codes (DTC) P2111, Throttle Body Stuck Open, and P2112, Throttle Body Stuck Closed. The petitioner indicates that the owners of both vehicles reported experiencing repeated incidents of stalling and engine surging. According to Ford, Escape non-hybrid vehicles are equipped with Electronic Throttle Body (ETB) assemblies beginning with MY 2009. Vehicles manufactured between June 22, 2009 and October 15, 2009 may contain contaminated printed circuit boards (PCB) with plating variations. Plating variations could lead to a lack of continuity in the throttle position sensor circuit where P2111 and/or other DTCs would be generated and stored. Ford and its electronic throttle body supplier, Delphi, modified the PCB manufacturing process and issued a technical service bulletin (TSB) 09-23-5. Vehicles produced after October 15, 2009 incorporated ETBs manufactured with a PCB process that resolved this condition. ODI's analysis identified a total of 123 unique reports indicating allegations of reduced motive power or vehicle stall. Depending on the condition of throttle control system malfunction, a driver may experience varying levels of reduced engine performance associated with three limp home modes. In two limp modes, reduced engine performance may maintain vehicle speeds above 20mph while the third is a limited limp home mode with engine speeds limited to approximately 900 RPM. Allegations of stall appear to be related to the limited limp home mode. Vehicles are not likely to unexpectedly stall as a result of this condition, but drivers may characterize the reduced functionality as a stall, even though their vehicle may still has motive capability. Allegations of vehicle surge appear to be related to limp home mode operation. Complaints alleging surge are most likely related to engine RPM fluctuations at low vehicle speeds or idle as the control system engages to prevent engine stall. In limited limp mode, rough-idle conditions may exist while the control system attempts to modulate engine RPMs once the vehicle reaches a reduced speed to maintain approximately 900 RPM. Separately, ODI received 59 complaints alleging incidents of engine stall while driving in model year (MY) 2010-2011 Ford Fusion vehicles. Approximately 60 percent (36) of the incidents occurred at speeds of 40 miles per hour or more. Eighty percent of complaints (47) were received beginning March 2012 and 14 complaints reported that the throttle body was replaced or DTCs associated with limp home modes. Additionally, Ford issued TSB 10-21-6 addressing DTCs associated with idle speed drops and limited limp home mode. The petition is granted on certain model years.
Preliminary Evaluation PE13-003 has been opened to assess the scope, frequency and potential safety consequences associated with the alleged defect.
See full copy of the closing resume for this defect petition for list of the VOQs associated with the defect petition analysis.
Vehicles and equipment listed for this investigation
NHTSA's investigations file lists these vehicles and equipment for Defect Petition DP12-006. A listed model year means only that an investigation names it; it says nothing about any particular vehicle. Model years with a try.vin recall page link to that page's NHTSA investigations section.
What an NHTSA investigation is
NHTSA's Office of Defects Investigation (ODI) looks into possible safety defects in vehicles and equipment, often after owner complaints. An investigation usually starts as a Preliminary Evaluation, or as a Recall Query when it concerns whether an existing recall covers the right vehicles or fixes the problem, and ODI can upgrade it to a more detailed Engineering Analysis. A Defect Petition asks NHTSA to open an investigation, and Audit and Equipment Queries are administrative investigations into whether companies complied with federal vehicle safety requirements, such as reporting, recall and certification rules.
An open investigation is not a finding that a safety defect exists, and NHTSA can close one without a recall.
To see whether a specific vehicle has an open recall, enter its VIN at nhtsa.gov/recalls.
Ford VIN check: decode a VIN to see its year, make and model.
Sources
NHTSA's investigation record for DP12-006
Investigation details come from NHTSA's investigations file, which try.vin imports once a day. The investigation types are described from the U.S. Department of Transportation Inspector General's May 2023 report on NHTSA's Office of Defects Investigation, NHTSA's petition rules (49 CFR Parts 552 and 557) and NHTSA's Office of Defects Investigation procedures. How try.vin reads NHTSA investigations.