P2119
Throttle Actuator Control Throttle Body Range/Performance
When a vehicle powertrain module registers the fault code P2119, it points directly to an internal system malfunction identified as "Throttle Actuator Control Throttle Body Range/Performance". Operating your engine under this condition may degrade long-term fuel maps.
Driver's Summary
The diagnostic trouble code P2119 indicates an active fault in the throttle actuator control throttle body range/performance circuit or component. The most common signs are rough idle, poor drivability, engine stalling at stops. Stop driving as soon as it is safe to do so. This fault can lead to expensive secondary damage if left unaddressed.
Symptoms
Rough idle, poor drivability, engine stalling at stops
Common Causes
- Throttle plate cannot return to default resting position
- Heavy carbon buildup
- Worn gears inside throttle body
- Throttle relearn not performed after battery disconnect
How to Fix
- 1 Perform idle relearn procedure
- 2 Clean the throttle body
- 3 Replace the throttle body assembly
Technical Explanation
P2119 is stored after the control module confirms the fault over multiple ignition cycles, ruling out transient electrical noise as the cause. The PCM distinguishes between electrical faults (circuit codes) and performance faults (rationality codes) by comparing the sensor's reported value against what other sensors would predict under the same engine operating conditions. Once confirmed, the code is stored as a permanent DTC and the MIL is activated. The freeze frame snapshot — recording RPM, load, coolant temperature, and fuel trim at fault detection — is also saved and is critical for accurate diagnosis.
Is It Safe to Drive?
This fault carries real mechanical risk. The root causes — including throttle plate cannot return to default resting position — can trigger a chain reaction of component failures if the vehicle continues to be driven. Have it towed or drive directly to a shop without delay.
Mechanic's Pro Tip
When diagnosing P2119, start with the cheapest and most accessible potential causes first: verify fuses, relay operation, and connector integrity before purchasing any parts. Use a scan tool to capture live data during the fault condition — static readings with the fault absent often yield no useful information. Document the freeze frame data stored with the code; it records the exact engine conditions (RPM, load, coolant temp, fuel trim) at the moment the fault was detected and is invaluable for replicating the fault on a test drive.
Relearn procedure: $50 - $100; Throttle body: $300 - $600