P2111 on 2017-2024 Chrysler Pacifica 3.6L: Throttle Body Stuck Open Causes and Fixes

What's Unique About the 2017-2024 Chrysler Pacifica

The 3.6L Pentastar V6 engine, used across many Chrysler, Dodge, and Jeep models, is notorious for this specific issue. The electronic throttle body is a very common failure point due to internal wear of the motor, plastic gears, or integrated sensors. While cleaning a throttle body can solve some issues on other vehicles, for the Pentastar engine, a P2111 code almost always points to an internal electronic or mechanical failure of the unit itself, making replacement the only reliable solution.

Symptoms You May Notice

• Check Engine Light is on
• Electronic Throttle Control (ETC) warning light (a red lightning bolt symbol) is illuminated or flashing
• Vehicle enters 'limp mode,' with drastically reduced engine power and speed
• Gas pedal is unresponsive or has very limited effect
• Engine may idle higher than normal
• Vehicle may stall or have a rough, fluctuating idle
• Sudden and dramatic loss of power while driving

Most Likely Causes

1. Failed Electronic Throttle Body 🔴 High Probability → Shop Fuel Injection Throttle Body This is a widely documented common failure part on the 3.6L Pentastar engine used in the Pacifica and many other Chrysler/Dodge/Jeep vehicles. The internal motor, plastic gears, or integrated position sensors fail, which is not a repairable condition.
   How to confirm: With the engine off, remove the intake tube from the throttle body. Have a helper turn the key to the 'ON' position (without starting the engine) and slowly press the gas pedal. Observe the throttle plate for smooth operation. Any sticking, binding, or failure to move correctly indicates a faulty unit. Often, no movement will be seen at all. A more advanced method is to use a scan tool to compare 'Commanded Throttle Position' vs. 'Actual Throttle Position' PIDs; if they do not match, the unit is faulty.
   Typical fix: Replace the entire throttle body assembly. 🎬 Watch this step-by-step Pentastar throttle body replacement guide After installation, a throttle relearn procedure is required. This typically involves turning the ignition to 'ON' (engine off) for 10-15 seconds, then turning it 'OFF' for 10-15 seconds. Repeat this cycle twice, then start the engine and let it idle for five minutes to complete the process. 🎬 Watch this video for alternative throttle relearn methods
   Est. part cost: $90-$250
2. Carbon Buildup ⚪ Low Probability While possible, it's less common for buildup alone to cause a 'stuck open' code compared to internal failure. This is more likely to cause a 'stuck closed' or range/performance code. For the P2111 code on a Pentastar, cleaning is rarely a permanent fix.
   How to confirm: Visually inspect the throttle body bore and plate for heavy black carbon deposits that could physically prevent the plate from closing.
   Typical fix: Clean the throttle body thoroughly with a dedicated throttle body cleaner and a soft brush. 🎬 See how to clean a Pentastar throttle body properly However, for a P2111 on this engine, cleaning is unlikely to solve the underlying electronic failure.
   Est. part cost: $5-$15

Rare But Worth Checking

• Wiring Harness Issue: Damage to the wiring or a poor connection at the throttle body connector can interrupt the signal, causing the PCM to lose control. On some 3.6L Pentastar applications, the wiring harness for the oil pressure sensor, located under the intake manifold, is prone to heat damage and can short, affecting the 5-volt reference circuit shared with the throttle body. This often sets a P0642 code along with P2111.
• Powertrain Control Module (PCM) Failure: → Shop Engine Control Module (ECM) This is extremely rare. The PCM is the computer that controls the throttle body. Before condemning the PCM, all other possibilities, especially the throttle body itself and its wiring, must be exhaustively ruled out.

Diagnosis Steps

1. Confirm the presence of code P2111 using an OBD-II scanner.
2. Check for any other related codes, such as P2101, P2110, or especially P0642, which would suggest a wiring issue.
3. Inspect the wiring harness and connector at the throttle body for any visible damage, corrosion, or loose connections.
4. Remove the air intake hose from the throttle body.
5. Visually inspect the throttle plate and bore for heavy carbon buildup or any foreign object that could cause it to stick.
6. With the key in the 'ON' position (engine off), have a helper slowly press and release the accelerator pedal. Watch the throttle plate to see if it moves smoothly and corresponds to the pedal input. If it's stuck, doesn't move, or moves erratically, the throttle body has failed.
7. If the visual/functional test is inconclusive, use a scan tool to monitor the live data for Commanded vs. Actual throttle position. A discrepancy confirms a faulty throttle body.
8. If the throttle plate operates correctly but the code persists, and especially if code P0642 is present, investigate the wiring harness for a short circuit, particularly near the oil pressure sensor under the intake manifold.
9. Replace the throttle body assembly if it fails the tests. Perform the throttle relearn procedure after installation.

Parts You'll Likely Need

• Electronic Throttle Body Assembly (OEM #05184349AF (supersedes previous versions like 5184349AE)) — This is the most common failure point for code P2111 on the 3.6L Pentastar engine. The internal motor or position sensor fails, requiring replacement of the complete unit.
  Trusted brands: Mopar (OEM), Bosch, Hitachi, Standard Motor Products (SMP), Cardone (Remanufactured)
  OEM price range: $250-$510
  Aftermarket price range: $90-$250

Related Codes That Often Appear With This One

• P2101 — This code for 'Throttle Actuator Control Motor Circuit Range/Performance' often appears with P2111 because they both point to an internal electronic failure within the throttle body assembly.
• P2112 — This is the opposite code, 'Throttle Actuator Control System - Stuck Closed.' It's sometimes seen with P2111 if the throttle body is failing erratically.
• P2110 — This code, 'Throttle Actuator Control System - Forced Limited RPM,' is not a fault but an informational code indicating the PCM has actively placed the vehicle in 'limp mode' as a result of the P2111 fault.
• P0642 — This code for 'Sensor Reference Voltage 'A' Circuit Low' points to a potential wiring short. On the Pentastar engine, the throttle body shares a 5V reference circuit with other sensors. If this code is present with P2111, investigate the wiring harness for shorts before replacing the throttle body.

Platform-Specific Known Issues

• Owner Experience: Sudden Failure: Many owners report that the failure is sudden and occurs without prior warning while driving. The vehicle will immediately go into limp mode with the ETC light flashing, which can be an alarming experience in traffic.

Mechanic-Grade Diagnostic Values

• 5V Reference Voltage at Throttle Body Connector — expected: ~5.0 volts (Key On, Engine Off). Failure: Voltage is low, zero, or intermittent. This points to a short or open in the F855 circuit, which may be caused by another sensor on the same circuit (e.g., oil pressure sensor).
• Throttle Position Sensor (TPS) 1 & 2 Signal Voltage — expected: One sensor sweeps from ~0.5V (closed) to ~4.5V (wide open). The second sensor often mirrors this, sweeping from ~4.5V to ~0.5V. The sweep must be smooth with no dropouts.. Failure: Voltage is stuck, jumps erratically, or does not sweep smoothly when the pedal is pressed, indicating internal sensor failure.
• ETC Motor Resistance — expected: Between 2.5 and 25 ohms across the two motor control pins on the throttle body.. Failure: Resistance is infinite (open circuit) or near-zero (short circuit), indicating the internal motor has failed.
• ETC Motor Circuit Continuity — expected: Below 5.0 ohms of resistance on the ETC Positive and Negative wires between the PCM connector and the throttle body connector.. Failure: Resistance is above 5.0 ohms, indicating an open or high-resistance in the wiring harness.

Scan Tool Commands That Help

• wiTECH (or capable aftermarket scanner): ETC Relearn / Throttle Follower Test — Use the Throttle Follower Test to command the throttle plate open and closed to confirm a mechanical or electrical failure. The ETC Relearn function should be performed after replacing the throttle body to reset learned values and ensure proper idle and performance.

Wiring & Ground Locations

• Throttle Body Connector (6-Pin) — Directly on the electronic throttle body, where the engine wiring harness connects.. This is the primary connection point for all power, ground, and signal wires controlling the throttle. A poor connection, corrosion, or damaged pin here can directly cause P2111. The typical pinout is: Pin 1: 5V Supply, Pin 2: TP Sensor 2 Signal, Pin 3: Sensor Ground, Pin 4: TP Sensor 1 Signal, Pin 5: ETC Motor (+), Pin 6: ETC Motor (-).

Real Owner Repair Stories

• allpar.com forums (2012 Dodge Journey 3.6L Pentastar V6 (Platform Mate)) — ETC warning light (lightning bolt) illuminated, reduced engine power (limp mode), and code P2111 present.
  ❌ Tried (didn't work) The user did not report trying other fixes first.
  ✅ What actually fixed it The owner performed a DIY replacement of the entire electronic throttle body assembly, which resolved all symptoms and cleared the code.

OEM Part Supersession History

• 5184349AB, 5184349AC, 5184349AD, 5184349AE → 05184349AF — These represent successive revisions by the manufacturer to improve reliability and address the known high failure rate of the internal electronic components.
  Heads up: All previous part numbers are superseded by 05184349AF. When replacing, ensure you are purchasing the latest revision (AF) or a quality aftermarket equivalent.

Diagnostic Flowchart

Other Known Issues on This Vehicle

Issues unrelated to this code that are worth knowing about as an owner of this generation:

• Harsh Shifting / Transmission Faults (ZF 9-Speed) 🔴 High — Common, especially on 2017 models. Can occur at various mileages, often starting around 20,000-30,000 miles. (Ref: Multiple TSBs have been issued for software updates to the Transmission Control Module (TCM) to improve shift quality.)
• Engine Start-Stop (ESS) System Failure 🟠 Medium — Very common. The small, secondary auxiliary battery required for the ESS system fails frequently, often within 1-2 years, disabling the feature and causing a 'Service Stop/Start System' warning.
• Power Sliding Door Malfunctions 🟠 Medium — Frequently reported by owners. Issues include doors not opening/closing, getting stuck, or making grinding noises. Causes range from software glitches to failing latch actuators or worn rollers. (Ref: TSB 08-008-20 (software update for over-sensitive obstruction detection), TSB 9004456 (latch diagnostics).)
• Rocker Arm / Lifter Failure ('Pentastar Tick') 🔴 High — A well-documented issue across the 3.6L Pentastar engine family. A rhythmic ticking noise from the top of the engine often precedes misfire codes and requires significant internal engine repair. (Ref: TSB 09-010-21 was issued for 2021 models to replace exhaust rocker arms for this issue.)
• Cracked Oil Filter Housing / Cooler Assembly 🟠 Medium — Very common failure on the 3.6L Pentastar, typically after 60,000 miles. The plastic housing becomes brittle from heat cycles and cracks, leading to significant oil leaks in the engine valley. (Ref: TSB S1809000007 addresses engine oil leaks/consumption.)

Used vs. New Parts: Buying Guide for This Vehicle

When a used part is the smart pick: Due to the extremely high failure rate of this specific part on the 3.6L Pentastar engine, purchasing a used throttle body from a junkyard is strongly discouraged. The risk of the used part failing soon after installation is very high, making it a poor value proposition despite the lower initial cost.

Donor-vehicle mileage cap: roughly under 30000 miles for the part to have meaningful remaining life.

What to inspect on the donor part:

• Verify the part number is the latest revision (05184349AF).
• Inspect the connector pins for any signs of corrosion or damage.
• Check for any visible cracks or damage to the plastic housing.
• If possible, ask for the donor vehicle's mileage and avoid high-mileage units.

OEM-only on this vehicle (don't cheap out):

• While not strictly 'OEM-only', using a new OEM Mopar or a reputable new aftermarket part (Bosch, Hitachi, SMP) is highly recommended over a used unit for this repair to ensure longevity.

Aftermarket brands forum-validated for this vehicle:

• Bosch
• Hitachi
• Standard Motor Products (SMP)
• A-Premium

Brands owners have reported issues with on this vehicle:

• Avoid unbranded, 'white-box' parts from online marketplaces, as their quality and durability can be highly inconsistent.

Real Owner Stories

Aggregated from forums and TSBs cited above. Mileages and costs reflect what owners reported in those sources.

Related OBD-II Codes

• P2101 — Electronic Throttle Control (ETC) System Performance code that may appear alongside P2111 during a throttle body failure.
• P2110 — Electronic Throttle Control (ETC) System - Forced Limited RPM, often triggered when the system detects the throttle is stuck open.
• P0642 — Sensor Reference Voltage 'A' Circuit Low; if present with P2111, it suggests a wiring harness short circuit near the oil pressure sensor rather than a mechanical throttle failure.
• P0300 — Random or Multiple Cylinder Misfire; can be related to the 'Pentastar Tick' (rocker arm/lifter failure) which is another common issue on this engine platform.

Frequently Asked Questions