Carbon buildup on the throttle plate and bore, preventing the plate from returning to the same closed position; A worn or dirty throttle position sensor (TPS) that produces a shifted voltage at closed throttle; A loose or corroded TPS electrical connector causing intermittent signal variation; A sticking or misadjusted throttle cable or cruise control linkage holding the plate slightly open; A PCM that has lost its learned adaptive values due to a battery disconnect or software glitch; A damaged or misrouted wiring harness to the TPS, introducing resistance or intermittent opens; An aftermarket air intake or throttle body spacer that alters the closed-throttle airflow and learning

DTC codes / Chrysler codes / P1524

P1524 · ChryslerTP Sensor Learned CI Throttle Angle Out Of Range

Q: What does code P1524 mean?

TP Sensor Learned CI Throttle Angle Out Of Range. P1524 on Chrysler vehicles means the powertrain control module (PCM) has detected that the learned closed-throttle angle from the throttle position (TP) sensor is outside the acceptable range stored during the last adaptive learning cycle. The PCM compares the current TP sensor voltage at closed throttle to the learned minimum and flags the code when the difference exceeds a calibrated threshold, indicating the throttle plate rest position or sensor signal has drifted.

P1524 on Chrysler vehicles means the powertrain control module (PCM) has detected that the learned closed-throttle angle from the throttle position (TP) sensor is outside the acceptable range stored during the last adaptive learning cycle. The PCM compares the current TP sensor voltage at closed throttle to the learned minimum and flags the code when the difference exceeds a calibrated threshold, indicating the throttle plate rest position or sensor signal has drifted.

SystemPowertrain

Code typeChrysler specific

SeverityMedium

Fix difficultyIntermediate

AreaVehicle speed, idle control and auxiliary inputs

Symptoms you may notice

Illumination of the check engine light, often with no other noticeable symptoms
Slightly higher or erratic idle speed as the PCM struggles to control the throttle
Momentary hesitation or stumble when accelerating from a stop
Poor fuel economy due to incorrect throttle angle interpretation
In rare cases, a limp-home mode with reduced power if the PCM cannot trust the TP signal
Intermittent stalling when coming to a stop if the learned angle is far off

Common causes, most likely first

Carbon buildup on the throttle plate and bore, preventing the plate from returning to the same closed position
A worn or dirty throttle position sensor (TPS) that produces a shifted voltage at closed throttle
A loose or corroded TPS electrical connector causing intermittent signal variation
A sticking or misadjusted throttle cable or cruise control linkage holding the plate slightly open
A PCM that has lost its learned adaptive values due to a battery disconnect or software glitch
A damaged or misrouted wiring harness to the TPS, introducing resistance or intermittent opens
An aftermarket air intake or throttle body spacer that alters the closed-throttle airflow and learning

How to diagnose and fix it

Inspect the throttle body bore and plate for carbon deposits and clean them with throttle-body cleaner and a soft brush
Check the TPS connector for corrosion, tightness, and damaged pins, then verify the closed-throttle voltage with a scan tool
Perform a throttle relearn or idle air control reset using a factory-level scan tool after cleaning or repairs
Check the throttle cable and cruise control linkage for binding or incorrect adjustment that holds the plate open
Backprobe the TPS signal wire and ground while slowly opening the throttle to look for dead spots or erratic voltage
If the TPS voltage is out of specification at closed throttle, replace the TPS and repeat the relearn procedure
Verify the PCM has the latest calibration and reflash if a known software issue exists for the vehicle

Why cleaning the throttle body often fixes P1524

Carbon buildup on the throttle plate is the most common cause of P1524 on Chrysler engines, because even a thin film changes the closed-throttle angle enough to exceed the learned limit.
Many technicians replace the TPS first, but the code often returns because the real problem is a dirty throttle body that was never cleaned and relearned.
A battery replacement or disconnect can erase the PCM's learned throttle values, causing P1524 to set until a proper relearn drive cycle is completed.
An aftermarket air intake or a throttle body spacer can change the closed-throttle airflow and cause the learned angle to fall out of range even when all components are functioning correctly.
The code does not always mean the TPS is failing; a sticking throttle cable or cruise control servo can hold the plate slightly open and trigger the same learned-angle error.

Can I keep driving with P1524?

You can usually drive the vehicle with P1524, but avoid aggressive acceleration and expect a slightly erratic idle until the fault is repaired. If the engine stalls or enters limp-home mode, have the vehicle checked promptly to avoid a safety risk in traffic.

Tools that help

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Guidance is general and written for Chrysler vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.