What Does P1730 Mean?
During a PCM self-test or diagnostic routine, the engine speed did not increase as expected when commanded. This indicates a problem with throttle control, air intake, or the PCM's ability to control engine speed.
Common Causes
35%
Dirty or sticking throttle body restricting airflow
30%
Faulty electronic throttle actuator or throttle position sensor
15%
Vacuum leak reducing engine responsiveness
10%
Mass airflow sensor providing incorrect readings
10%
PCM software issue requiring reflash or update
Diagnostic Steps
1
Step 1: Clean throttle body and idle air control passages thoroughly
2
Step 2: Monitor throttle position sensor and actual throttle angle during commanded increase
3
Step 3: Check for vacuum leaks using smoke machine or propane enrichment test
4
Step 4: Verify mass airflow sensor readings at idle and during throttle changes
5
Step 5: Check for PCM software updates or TSBs related to self-test procedures
Estimated Repair Cost
$80 - $400
Parts + labor, varies by vehicle and location
During a PCM self-test or diagnostic routine, the engine speed did not increase as expected when commanded. This indicates a problem with throttle control, air intake, or the PCM's ability to control engine speed.
The most common cause of P1730 (Insufficient Engine Speed Increase During Self Test) is: Dirty or sticking throttle body restricting airflow
Typical repair costs for P1730 range from $80 to $400, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Generally safe to drive but may indicate underlying throttle control issues. Vehicle may exhibit poor throttle response or idle problems.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1730 to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Powertrain
System
Engine Management / Throttle Control
Difficulty
Type
Manufacturer
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
