🚨 Diagnostic Profile
Vehicle Make: Dodge
Fault Description: Idle Select Signal Invalid
This profile covers an invalid idle select signal reported by the control module, commonly associated with codes such as P2110, P0511, P0506/P0507, or similar idle air control/throttle system logic faults on Dodge/Chrysler group vehicles using an Electronic Throttle Control (ETC) system. On drive-by-wire Dodge platforms, there is no traditional cable-operated idle air control motor; instead, the Powertrain Control Module (PCM) commands idle speed directly through the electronic throttle body actuator, and an “idle select” or “idle validation” signal typically refers to input from the Accelerator Pedal Position (APP) sensor assembly or the Throttle Position (TP) sensor correlation used to confirm the throttle is at a valid idle position. The fault may originate from the APP sensor, the TP sensor within the electronic throttle body, the related wiring/connectors, or the PCM input driver circuit itself. Confirm the exact model, year, and engine configuration (e.g., 3.6L Pentastar, 5.7L HEMI, 2.4L Tigershark) before starting, because connector pin counts, sensor redundancy logic, and wiring colors vary significantly by platform and model year.
🚨 Repair Difficulty Tier
Tier: [Intermediate]
Diagnosis requires a capable scan tool (factory wiTECH preferred for Dodge, or a quality enhanced aftermarket scanner), a digital multimeter, and access to the factory wiring diagram for the specific model year. Repairs are usually mechanically straightforward (sensor or connector replacement), but correctly isolating the dual/redundant sensor signal mismatch and confirming the PCM’s response requires a structured diagnostic approach and, in many cases, a throttle body relearn using factory-level software.
🛠️ Resolution Steps
Step 1: Preliminary Inspection
- Verify battery voltage is at least 12.4V at rest and confirm charging system output is within normal range (typically 13.5–14.7V) at idle with accessories off, since low or unstable system voltage can cause erratic sensor readings and false invalid-signal faults.
- Check for stored and pending diagnostic trouble codes with a scan tool and record all freeze frame data, paying close attention to companion codes for the APP sensor, TP sensor, or throttle actuator control, since idle select faults rarely occur in isolation.
- Inspect the electronic throttle body connector and the accelerator pedal sensor connector for corrosion, bent pins, spread terminals, or moisture intrusion; these are the two most common fault origin points on Dodge ETC-equipped vehicles.
- Inspect the full harness route between the throttle body/APP sensor and the PCM for chafing, pinched sections, heat damage near the exhaust or engine block, or evidence of aftermarket wiring modifications (remote starts, aftermarket alarms, etc.).
- Check the PCM chassis and engine block ground straps, along with the main power feed connections, for looseness, corrosion, or elevated resistance, as a poor PCM ground can cause multiple sensor correlation faults.
- Review recent service history for any throttle body cleaning, pedal assembly replacement, battery disconnects, or PCM reprogramming that may have disrupted a prior relearn condition.
Step 2: Diagnostic Verification
- Reference the factory wiring diagram for the specific model year to confirm the exact pin assignments for the dual-redundant signal circuits at both the throttle body and APP sensor connectors; Dodge ETC systems use two separate sensor signals per component for plausibility checking, and both must be mapped before testing.
- With the connector disconnected and key on engine off, measure sensor reference voltage (typically a regulated 5V circuit) and verify a clean ground return at the sensor using a digital multimeter, backprobing rather than piercing insulation.
- Monitor both idle/throttle correlation PIDs on a scan tool capable of live data (e.g., APP Sensor 1 and 2, TP Sensor 1 and 2) with key on engine off and engine running at idle; the two signals per sensor pair should track together with a consistent, specification-correlated voltage offset — any abrupt disagreement, dropout, or out-of-range reading points to that specific circuit.
- Perform a wiggle test on the throttle body and APP sensor harness and connectors while watching live data for signal dropouts, voltage spikes, or intermittent invalid flags, concentrating on areas near connector locks and harness bend points.
- Check continuity and resistance of the suspect signal and ground return circuits end-to-end (connector to PCM) against an open/known-good wire of the same gauge and length; resistance should be negligible (typically well under 5 ohms) with no continuity to chassis ground or battery voltage.
- Confirm there are no shorts to voltage or ground on the signal circuit by checking for unexpected voltage present with the connector disconnected and ignition on.
Step 3: Resolution & Reset Process
- Repair or replace the faulty component (APP sensor assembly, electronic throttle body, or wiring harness section/connector) according to factory service procedures, ensuring any torque specs on throttle body mounting bolts are followed to prevent air leaks or sensor misalignment.
- Clean all mating connector surfaces with electrical contact cleaner, secure all terminals until a positive click/lock is confirmed, and apply dielectric grease to weatherproof connector seals only, not on the terminal contact points themselves.
- Clear all diagnostic trouble codes with a scan tool after the repair is completed and before performing any relearn procedure.
- Perform the factory-required Electronic Throttle Body relearn/minimum idle airflow relearn procedure, which on most Dodge ETC platforms involves cycling the key on/off per the service manual sequence or allowing the PCM to self-learn through a specific idle/warm-up drive cycle; a factory-level tool such as wiTECH is strongly recommended to confirm successful completion of this relearn.
- Road test the vehicle through a complete drive cycle including idle, light acceleration, deceleration, and highway speed to confirm the fault does not return and that idle quality is smooth and stable.
- Recheck for stored or pending codes after the drive cycle, and document final live data readings for both sensor signals at idle, confirming correlation is within normal tracking range.
📦 Parts, Labor, and Budget Estimates
Required Components/Software:
- Accelerator Pedal Position (APP) sensor assembly (sold as a complete pedal unit on most Dodge models)
- Electronic throttle body assembly (includes integrated TP sensors, non-serviceable separately on most applications)
- Wiring harness repair kit with OEM-style connector pigtail and properly gauged terminals, or a dealer-sourced connector pigtail specific to the throttle body or APP sensor
- Dielectric grease and electrical contact cleaner for connector service
- Factory-level diagnostic software (wiTECH 2.0 subscription) or a current-generation enhanced aftermarket scan tool with bi-directional throttle relearn capability
Average Component Price:
- APP sensor/pedal assembly: approximately $90–$220 depending on model and trim
- Electronic throttle body assembly: approximately $180–$450 depending on engine platform
- Harness or connector pigtail repair kit: approximately $25–$90
- Consumables (contact cleaner, dielectric grease, terminals): approximately $10–$25
- wiTECH short-term diagnostic subscription (if required for relearn): approximately $35–$75 for a 24–72 hour access window through FCA/Stellantis TechAuthority
Estimated Labor Hours:
- Preliminary inspection and diagnosis (code retrieval, wiring/connector inspection, live data review): 0.5–1.2 hours
- Component or wiring repair (APP sensor or throttle body replacement, connector repair): 0.5–1.5 hours depending on accessibility and whether intake components must be removed
- Reset, relearn, and verification drive cycle: 0.3–0.6 hours
- Total estimated shop time (diagnosis through verification): approximately 1.3–3.3 hours, billed at prevailing local shop labor rate