🚨 Diagnostic Profile
Vehicle Make: Chrysler
Model/Year: Chrysler/Dodge/Jeep platform equipped with Electronic Throttle Control (ETC) — applies broadly across the fleet since the vehicle generation was not specified; verify exact model/year against the VIN before ordering parts or software.
Description: TP Sensor Learn Not Complete. The throttle position (TP) sensor relearn or adaptation procedure has not finished successfully, so the powertrain control module may not have a verified closed-throttle and wide-open-throttle reference.
🚨 Repair Difficulty Tier
Tier: Intermediate
This procedure requires a capable scan tool with bi-directional or relearn functions, a basic understanding of throttle body service, and access to model-specific relearn steps. Mechanical work is usually minimal, but an incorrect relearn sequence can leave the fault active.
🛠️ Resolution Steps
Step 1: Preliminary Inspection
- Confirm all stored DTCs and freeze frame data with a scan tool and record them before clearing anything. Pay particular attention to companion codes such as P2101, P2135, P0122/P0123, or P0222/P0223, which directly affect relearn success.
- Inspect the throttle body bore and throttle plate for carbon buildup, debris, or sticking — this is the single most common cause of a failed TP learn on electronic throttle bodies.
- Check the accelerator pedal assembly for binding, wear, or inconsistent return travel, since the Accelerator Pedal Position (APP) sensor values are cross-checked by the PCM during the relearn.
- Inspect the throttle body electrical connector for corrosion, bent pins, or loose terminals. Because exact pin numbering varies by model year and throttle body supplier (Mitsubishi vs. Bosch units used across the Chrysler lineup), confirm pin assignment using the OEM wiring diagram for the exact VIN before performing circuit testing — do not assume a universal pin layout.
- Check battery state of charge and ground connections; a battery below approximately 12.4V or a poor chassis/engine ground can interrupt or invalidate a relearn attempt. Charge or support the battery with a stable power supply during the procedure.
- Verify the ignition and engine are in the correct state required by the service procedure: key ON/engine OFF for static learns, or engine fully warmed to operating temperature and at a stable idle for dynamic idle relearns, per the applicable service information for the confirmed model/year.
Step 2: Diagnostic Verification
- Monitor the TP sensor 1 and TP sensor 2 (or equivalent dual-track) live data PIDs with the scan tool while slowly cycling the accelerator pedal from closed throttle to wide-open throttle.
- Confirm the two sensor signals move in an inverse, mirrored relationship (as one trace rises the other falls proportionally) and that neither signal is pegged at 0%, 100%, or flatlined — any of these indicates a sensor, wiring, or throttle body fault that must be resolved before a relearn will complete.
- Check reference voltage and signal circuits at the throttle body connector using a digital multimeter: confirm a stable 5V reference signal from the PCM and a return ground near 0V, back-probing the connector rather than piercing the insulation, and compare readings against a verified known-good ground.
- Check for related DTCs such as throttle position sensor performance, throttle actuator control, or accelerator pedal position sensor faults, and resolve those root causes first, since the PCM will typically refuse to complete a TP learn while a related fault is active.
- Confirm the throttle plate moves freely and returns fully to its mechanical closed-stop position without binding, using the scan tool’s bi-directional throttle actuator test if available.
Step 3: Resolution & Reset Process
- If carbon buildup is present, clean the throttle body using an approved throttle body/intake cleaner labeled safe for electronic throttle bodies and a clean lint-free cloth. Do not force the plate open by hand, as this can damage the internal stop or skew the learned closed-throttle position.
- If a component (throttle body, APP sensor, or related wiring) fails verification, replace it and install the new part according to the OEM service procedure, including any required gasket or O-ring.
- Perform the TP sensor learn or minimum throttle position relearn using the scan tool’s dedicated function where supported. On many Chrysler/Dodge/Jeep ETC-equipped platforms, this is achieved by cycling the ignition key to the RUN position (engine off) for several seconds, then OFF, repeating this cycle multiple times to allow the PCM to log the closed-throttle reference — always confirm the exact cycle count and timing against the OEM procedure for the verified model/year rather than assuming a universal count.
- Follow any additional key-cycle, idle, or drive-cycle timing specified by the OEM procedure, which may require a stabilized idle period or a short road test through part-throttle and wide-open-throttle ranges to complete adaptive learning.
- Clear the DTCs, road test the vehicle through its full throttle range, and confirm the learn status now reads complete using the scan tool’s readiness or learn-status PID.
- Recheck for any returning DTCs and document the final sensor values and learn status for the repair record.
📦 Parts, Labor, and Budget Estimates
Required Components/Software:
- Scan tool with OEM-level or enhanced aftermarket TP relearn/throttle adaptation function (e.g., factory-level diagnostic software or a capable enhanced scan tool with Chrysler-specific bi-directional functions)
- Throttle body assembly (only if replacement is required after failed cleaning/inspection) — order by VIN-matched part number from a dealer parts department or OEM supplier
- Throttle body safe cleaner and lint-free cloths
- Gasket or O-ring kit for throttle body removal, if applicable to the specific intake design
- Accelerator pedal position sensor assembly (only if confirmed faulty through live data testing)
- Updated PCM software/calibration, only if a related technical service bulletin applies to the confirmed VIN
Average Component Price:
- Scan tool diagnostic time/subscription access: $0–$150 (shop-owned tools) or $20–$40/day for rental-tier subscription access
- Throttle body assembly: $150–$450 for the part alone, depending on model and whether it is a dealer OEM unit or quality aftermarket equivalent
- Cleaning supplies and gaskets: $15–$40
- Accelerator pedal position sensor: $60–$180
- Total parts estimate (cleaning only, no replacement): $15–$40; Total parts estimate (with throttle body replacement): $165–$490
Estimated Labor Hours:
- Preliminary inspection and DTC review: 0.3–0.5 hour
- Diagnostic verification (live data, circuit testing): 0.5–1.0 hour
- Throttle body service (cleaning) or replacement if needed: 0.5–1.5 hours depending on intake accessibility
- TP sensor learn procedure and road test: 0.3–0.5 hour
- Total labor estimate: 1.0–1.5 hours for diagnosis and cleaning/relearn only; 1.6–3.5 hours if throttle body or pedal sensor replacement is required (typical shop labor rates range $120–$180/hour, so total labor cost runs approximately $120–$630 depending on scope)