P2107 Throttle Actuator Circuit Open: Fix with ICARZONE UR1000
P2107 Code: Throttle Actuator Control Module Processor
In 60% of cases, P2107 is fixed with a $15 throttle body cleaning plus a free relearn procedure — not a $1,200 throttle assembly replacement. This guide shows you exactly how to diagnose, clean, and relearn the electronic throttle the right way.
What Does P2107 Actually Mean?
Modern vehicles use drive-by-wire electronic throttle control (ETC). When you press the accelerator pedal, a position sensor sends a signal to the engine control module, which then commands the throttle body motor to open or close the throttle plate by a corresponding amount. The Throttle Actuator Control (TAC) module — sometimes integrated into the ECM, sometimes a separate processor — handles this loop.
P2107 sets when the ECM detects an internal processor fault in the TAC module — either a watchdog timeout, a checksum failure, or a logic error in the throttle control routines. When this happens, the ECM forces the throttle into a default "limp home" position (typically a fixed small opening) and drops the vehicle into reduced power mode to protect against unintended acceleration.
Symptoms of P2107
What Causes P2107? (Ranked by Frequency)
Heavy Carbon Buildup on Throttle Body
Carbon deposits behind the throttle plate cause the position sensor to read inconsistent values. The TAC module sees motor commands that don't match expected throttle position and stores P2107. Very common on GDI engines (Audi 2.0T, Ford EcoBoost, BMW N-series) after 60K+ miles.
Fix: $15-$40 cleaner spray · 1 hourFailed Electronic Throttle Body Motor
The DC motor inside the throttle body wears out, develops high resistance, or sticks intermittently. Confirmed by checking motor current draw with a multimeter. Replacement costs $200-$600 plus the mandatory relearn procedure.
Fix: $200-$600Throttle Body Wiring or Connector Issue
Vibration and heat damage the 6-pin connector at the throttle body. Green corrosion or a single bent pin creates the inconsistent signals the TAC module interprets as a processor fault. Clean and re-seat as the first electrical step.
Fix: $10-$40Skipped Relearn After Cleaning or Battery Disconnect
After cleaning the throttle body, disconnecting the battery, or replacing the throttle body, the ECM must relearn the closed and full-open throttle positions. Without this procedure, P2107 and rough idle often appear immediately. Many DIYers don't realize this is required.
Fix: $0 (relearn with scanner)Failed TAC Module / ECM Processor
True internal processor failure is rare and usually triggered by water intrusion, voltage spikes, or aged solder joints. Confirmed only after throttle body, wiring, and relearn have been ruled out. ECM replacement plus VIN-matched programming required.
Fix: $600-$1,500What You'll Need
Tools
- Bidirectional OBD2 scanner with throttle relearn iCarzone UR 1000 ›
- Throttle body cleaner (CRC or similar) $10-$15
- Soft toothbrush or microfiber cloth
- Torx and socket set
- Digital multimeter
- Safety glasses
Possible Parts
- Throttle body gasket $5-$15
- Throttle body cleaner can $10-$15
- Connector pigtail repair kit $15-$30
- Electronic throttle body assembly $150-$600
- ECM (last resort) $400-$1,200
iCarzone UR 1000 Wireless Bidirectional Scan Tool
Supports Electronic Throttle Control (ETC) relearn out of the box — the mandatory procedure after cleaning or replacing the throttle body. Includes 40,000+ bidirectional tests, live throttle position graphing, full-system diagnostics, and TPMS programming on a 7 inch wireless tablet.
How to Diagnose P2107 at Home (6 Steps)
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1
Read All Codes and Freeze-Frame Data
Plug in the scanner and pull every code. P2107 frequently appears with P2101, P2110-P2138 (throttle motor/sensor circuit codes), or P1516 (throttle actuator command/position mismatch). Multiple codes pointing to the throttle system often share the same root cause — usually carbon buildup or wiring.
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2
Visually Inspect Throttle Body and Connector
Remove the intake duct to expose the throttle body. Look at the throttle plate — heavy black carbon buildup behind the plate is the #1 cause of P2107. Disconnect the 6-pin electrical connector and inspect for corrosion or melted insulation. A truly clean throttle body with healthy wiring rarely sets P2107.
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3
Clean the Throttle Body Properly
With the engine OFF, spray throttle body cleaner on the plate and bore. Use a soft microfiber cloth (never abrasive) to wipe away carbon. Do NOT manually force the throttle plate open — on electronic throttles, this can damage the gears. Reinstall and reconnect.
Never use carb cleaner or brake cleaner on an electronic throttle body. The solvents damage the motor and sensor coating. -
4
Perform the Throttle Relearn Procedure
This step is mandatory and where most DIY repairs fail. Use the UR 1000's "Throttle Adaptation" or "ETC Relearn" function under reset services. The general procedure: turn ignition on (engine off), follow scanner prompts to cycle throttle from closed to wide-open, then start the engine and idle for 3-5 minutes. The ECM relearns the throttle position limits.
On VW/Audi: "Basic Settings" group 060/098. On GM: "Idle Learn / Throttle Position Learn". On Ford: drives a stepper sequence on first key-on after fault clear. -
5
Test Live Throttle Position Sensor Values
With engine running, monitor live TPS1 and TPS2 voltages in the scanner. At idle, both should read consistent values (typically TPS1 ~0.6V and TPS2 ~4.4V, depending on platform — the two sensors are inverted for safety). Open the throttle by pressing the accelerator: TPS1 should rise smoothly, TPS2 should fall smoothly. Any jumps, dropouts, or stuck values point to a failed sensor.
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6
Clear Codes and Road Test
After cleaning and relearning, clear codes and drive the vehicle through varied throttle positions for 5-10 miles. Monitor live throttle data. If P2107 returns within one drive cycle and the throttle body and wiring test clean, escalate to throttle body replacement or ECM diagnosis.
How Much Does P2107 Cost to Fix?
| Repair | DIY Cost | Shop Cost | You Save | Type |
|---|---|---|---|---|
| Throttle body cleaning + relearn | $15-$30 | $120-$250 | Up to $220 | Try First |
| Connector cleaning / repair | $10-$40 | $100-$200 | Up to $160 | DIY Friendly |
| Throttle body gasket replacement | $5-$15 | $80-$150 | Up to $135 | DIY Easy |
| Electronic throttle body replacement | $150-$600 | $400-$1,200 | Up to $600 | Shop Advised |
| ECM replacement + programming | N/A | $600-$1,500 | — | Shop Required |
Which Cars Get P2107 Most Often?
| Make | Model | Years | Primary Cause & Notes | Risk |
|---|---|---|---|---|
| Chevrolet / GMC | Silverado, Tahoe, Equinox | 2007-2017 | 5.3L V8 and 3.6L V6 see carbon buildup around 60-80K miles. Idle relearn is critical after any throttle service. | High |
| VW / Audi | Jetta, GTI, A4, Q5 (2.0T) | 2008-2020 | GDI carbon buildup is severe on 2.0T platforms. May require walnut blast on intake valves alongside throttle cleaning. | High |
| Dodge / Jeep | Grand Cherokee, Charger (3.6L Pentastar) | 2011-2020 | Pentastar throttle body connector corrosion is a known TSB issue. Inspect wiring before cleaning. | Medium |
| Ford | F-150, Edge (EcoBoost) | 2011-2020 | Direct injection carbon buildup affects throttle response. PCM relearn varies by year. | Medium |
Should You DIY or Call a Mechanic?
- ✓ Own a scanner with throttle relearn function
- ✓ Can access the throttle body (most vehicles, 10-15 min)
- ✓ Understand the relearn procedure is mandatory, not optional
- ✓ Want to save $120-$220 in shop costs
- → Cleaning and relearn don't clear the code
- → Vehicle is under powertrain warranty
- → Code paired with TPS or APP (pedal) sensor faults
- → ECM replacement or programming required
Frequently Asked Questions
Can I drive with a P2107 code?
Will cleaning the throttle body fix P2107?
Do I need to relearn the throttle after cleaning?
Can a dirty MAF sensor cause P2107?
What scanner do I need to diagnose P2107?
Why does P2107 come back after I replaced the throttle body?