ETC Power Less Than Demand
Your engine's electronic throttle control isn't generating enough power to meet what the engine needs, like an underpowered water pump trying to fill a large tank. The ECU detects that throttle response is weaker than expected for the current driving demand.
The ECU monitors the electronic throttle actuator's ability to deliver requested throttle opening versus actual position feedback. It compares the voltage and current supplied to the throttle motor against the throttle angle response it receives, detecting when the motor cannot generate sufficient force to meet demand.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Throttle Motor Current Draw | 0.5-3.0 amps under load | Below expected current for requested position |
| Throttle Position Response Time | 50-150 milliseconds | Delayed response or inability to reach commanded angle |
Code P1583 is a moderate fault. You can generally drive to a workshop, but avoid long trips or high-load driving (motorway, uphill towing) until it is diagnosed. If the code keeps returning after clearing, or if you notice the symptoms listed above worsening, do not delay professional diagnosis. Many moderate codes have multiple possible root causes — a mechanic with live OBD data can identify the exact fault more efficiently than part-by-part trial and error.
Once the fault is repaired, P1583 can be cleared using any OBD-II scanner. Connect the scanner, navigate to "Clear Codes" or "Erase DTCs," and confirm. The check engine light turns off immediately.
The code will return if the root cause was not actually fixed. The ECM re-detects the fault within 1–3 drive cycles and sets the code again.