P2104: Throttle Actuator Control System - Forced Idle
What Does P2104 Mean?
P2104 is a diagnostic trouble code indicating: Throttle Actuator Control System - Forced Idle. This code relates to the powertrain system. It has been reported in NHTSA complaints across 5 different vehicle models.
Symptoms of P2104
- ⚠️ Check engine light illuminated
- ⚠️ Hesitation during acceleration
- ⚠️ Vehicle won't start
- ⚠️ Vehicle enters limp/reduced power mode
- ⚠️ Engine dies during operation
Common Causes
- 🔍 Worn or fouled spark plugs
- 🔍 Throttle body or throttle position sensor issue
- 🔍 Sensor or control module malfunction
P2104 Reports by Year
Real Owner Reports
From NHTSA complaint database — actual owner descriptions.
"ON THREE SEPARATE OCCASIONS, MY FORD 2005 F150 KING RANCH SUPERCREW 4X4 ENGINE SUDDENLY DIED WHILE DRIVING AT APPROXIMATELY 55-60MPH. ON ALL THREE OCCASIONS, I FORTUNATELY WAS ABLE TO PULL OVER TO THE SIDE OF THE ROAD WITH THE ENGINE DIED AND NO POWER STEERING. IF I HAD NOT BEEN IN THE RIGHT HAND "
— Ford F-150 owner, 04/07/2012
"I HAVE A 2005 F-150 SUPERCREW. OVER THE LAST SEVERAL MONTHS - APPROXIMATELY 70K MILES ON TRUCK AT THE TIME - THE VEHICLE GOES INTO A "FAIL SAFE" MODE WITH THE CODES P2111 AND P2104. THE ACCELERATOR STOPS WORKING AND YOU HAVE TO COAST TO THE SIDE OF THE ROAD AND TURN THE CAR OFF. THE ORANGE WRENCH LI"
— Ford F-150 owner, 12/01/2009
"2005 FORD F150 VEHICLE LOSES POWER AND ALL CONTROL WHILE DRIVING ON THE ROAD. THIS HAPPENED AT LEAST SIX TIMES. VERY LUCKY TRAFFIC WAS LIGHT MOST TIMES BUT ONE ALMOST A CAUSED REAR END COLLISION. I REPLACED A THROTTLE SENSOR AND THE PROBLEM DISAPPEARED AND THE PROBLEM RETURNED AFTER A COUPLE OF WEEK"
— Ford F-150 owner, 08/12/2009
Source: NHTSA Complaints Database
Most Reported Vehicles for P2104
Based on NHTSA owner complaint data.
| # | Vehicle | Reports |
|---|---|---|
| 1 | FORD F-150 | |
| 2 | FORD FUSION | |
| 3 | FORD EXPEDITION | |
| 4 | FORD EXPLORER | |
| 5 | FORD MUSTANG |
P2104 Reports by Vehicle
Detailed NHTSA complaint analysis for each vehicle model.
Frequently Asked Questions
Can I drive with this code?
Will this code clear itself?
How do I find the exact cause?
What To Do Next
Possible Fixes
- 🔧 Have the code scanned with a professional-grade scanner to read freeze frame data
- 🔧 Test the relevant sensor(s) with a multimeter before replacing
- 🔧 If DIY repair isn't feasible, get a diagnostic from a trusted mechanic ($50-150)
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1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
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2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
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3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.