Engine-Codes - Dodge - P0508 DODGE

P0508 DODGE - Idle Air Control Valve Sense Circuit Low

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3  What is this?
Table of contents

P0508 DODGE Possible Causes

  • Faulty Idle Air Control (IAC) motor
  • Idle Air Control (IAC) motor harness is open or shorted
  • Idle Air Control (IAC) motor circuit poor electrical connection

How is the P0508 DODGE code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

What is the cost to diagnose the P0508 DODGE code

Labor: 1.0

The cost to diagnose the P0508 DODGE code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
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When is the code detected?

The PCM senses a short to ground or battery voltage on any of the control circuits for 2.75 seconds while the IAC motor is active.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Engine hard to start
  • Rough or erratic idle speed

P0508 DODGE Meaning

The Engine Control Module (ECM) controls the engine idle speed to a specified level through the fine adjustment of the air, which is let into the intake manifold, by operating the electric throttle control actuator. The operating of the throttle valve is varied to allow for optimum control of the engine idling speed. The ECM calculates the actual engine speed from signals of crankshaft position sensor (POS) and camshaft position sensor.
The ECM controls the electric throttle control actuator so that the engine speed coincides with the target value memorized in the ECM. The target engine speed is the lowest speed at which the engine can operate steadily. The optimum value stored in the ECM is determined by taking into consideration various engine conditions, such as during warming up, deceleration, and engine load (air conditioner, power steering and cooling fan operation, etc.)

More Information

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