NHTSA Office of Defects Investigation
Preliminary Evaluation PE12-005: Stuck throttle
- Closed
NHTSA's Office of Defects Investigation opened Preliminary Evaluation PE12-005 on March 7, 2012 and closed it on October 22, 2012. NHTSA's investigations file lists the Ford Taurus and Mercury Sable for it.
Updated daily from NHTSA's investigations file
Key facts
- NHTSA number
- PE12-005 (also written PE12005)
- Investigation type
- Preliminary Evaluation The first stage of most defect investigations: NHTSA's Office of Defects Investigation gathers basic information about a possible safety defect, including from the manufacturer.
- Status
- Closed October 22, 2012
- Opened
- Closed
- Vehicle or equipment manufacturer
- Ford Motor Company
- Components
- Vehicle Speed Control; Vehicle Speed Control — Cables
- Vehicles and equipment
- Ford Taurus and Mercury Sable
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 Preliminary Evaluation PE12-005.
try.vin does not copy NHTSA's investigation documents; NHTSA's investigation record lists the ones NHTSA has published.
Preliminary Evaluation (PE)12-005 was opened to investigate allegations of speed control cables detaching from the throttle body and subsequently interfering with the throttle closing fully to the idle position in model year (MY) 2005 and 2006 Ford Taurus vehicles.
The speed control cable, throttle body attachment arm (?nail head?) for the speed control cable, cable mounting bracket and cable routing for the MY 2005 and 2006 Ford Taurus are common to all MY 2004 through 2006 Ford Taurus and Mercury Sable vehicles equipped with either the 155 HP 3.0L 2-valve Vulcan engine or the 200 HP 3.0L 4-valve Duratec engine (the ?subject vehicles?). Figures 1 and 2 show the throttle body cam and speed control cable installed and a cable interference condition caused by contact between a detached cable and the ?nail head.?Ford?s assessment of the condition in incident vehicles noted that the interference conditions produced tended to be short in duration as the cable end tended to dislodge itself from the throttle body due to vibration, road loads or engine roll in addition to tapping the acceleration pedal.
Ford inspected three incident vehicles and measured maximum throttle openings of 5.8% to 14.9%, resulting in engine speeds ranging from 1600 to 2200 rpm with the transmission selector in Drive.
A Ford stack-up analysis of the speed control cable length from the attachment bracket to the throttle body indicated a maximum theoretical throttle opening of 16.4% that could result from the alleged defect. Engineers at the NHTSA Vehicle Research and Test Center (VRTC) inspected an incident vehicle to evaluate throttle positions and engine speeds that could result from the alleged defect and performed brake testing of a vehicle with the throttle stuck at the worst case throttle opening that could result from the condition.
The VRTC vehicle inspection noted that, depending on the orientation of the detached cable end, the amount of throttle opening that could result from interference by a detached speed control cable end varied from 4.8% to 11.3%.
VRTC brake testing of a MY 2006 Taurus with a Vulcan engine and the throttle held open at 16% found that, even with multiple brake applications, sufficient vacuum was available for the brake booster assist and the brake pedal efforts required to stop the vehicle did not increase significantly from normal operating conditions. ODI?s analysis of 100 complaints related to the alleged defect found that drivers were generally able to free the interference condition or safely brake to a stop without incident.
Approximately one-third (32) reported that the stuck throttle condition was corrected with no action or by tapping the accelerator pedal while the vehicle was still moving, another third (34) reported braking to a stop with the vehicle in Drive prior to correcting the condition, and the remaining third (34) reported that the driver responded to the incident by shifting to Neutral before stopping the vehicle.
One complaint alleged that stuck-throttle type symptoms caused the vehicle to pass partially through a traffic light and into an intersection before stopping, however,ODI was unable to contact the owner to verify the cause or relationship to the alleged defect condition.
ODI has not identified any crashes related to the alleged defect. Tables 1 and 2 provide a breakdown of complaints and warranty claims related to the alleged defect by engine and model year.
A safety-related defect has not been identified at this time and further use of agency resources does not appear to be warranted.
Accordingly, this investigation is closed.
The closing of this investigation do
Vehicles and equipment listed for this investigation
NHTSA's investigations file lists these vehicles and equipment for Preliminary Evaluation PE12-005. 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.
Ford
All Ford recallsMercury
All Mercury recallsWhat 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.
Free VIN check: decode a VIN to see its year, make and model.
Sources
NHTSA's investigation record for PE12-005
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.