P0508 Mitsubishi Code - Idle Air Control Valve Sense Circuit Low
Quick Answer
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. Common causes include Dirty throttle body, Electric throttle control actuator misadjusted or damaged, Faulty Electric throttle control actuator. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0508 Mitsubishi indicates Idle Air Control Valve Sense Circuit Low.
- Common causes
- Common causes include Dirty throttle body, Electric throttle control actuator misadjusted or damaged, Faulty Electric throttle control actuator.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P0508 Mitsubishi Description
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.)
What are the Possible Causes of the DTC P0508 Mitsubishi?
- Dirty throttle body
- Electric throttle control actuator misadjusted or damaged
- Faulty Electric throttle control actuator
- Intake air leak
- Poor electrical connection to the Intake Air Control (IAC) valve
How to Fix the DTC P0508 Mitsubishi?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0508 Mitsubishi code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P0508 Mitsubishi Code
1. What does the OBDII code P0508 mean on a Mitsubishi?
P0508 indicates that the Idle Air Control (IAC) Valve Sense Circuit is reading a low voltage, which may affect the engine's ability to maintain proper idle speed.
2. What are the common symptoms of a P0508 code in a Mitsubishi?
Symptoms may include rough idling, stalling, difficulty starting the engine, and an illuminated check engine light.
3. What causes the P0508 code to appear in a Mitsubishi?
Common causes include a faulty Idle Air Control Valve, damaged wiring or connectors in the IAC circuit, or a malfunctioning Engine Control Module (ECM).
4. How do I diagnose a P0508 code in my Mitsubishi?
Start by inspecting the IAC valve, wiring, and connectors for visible damage. Use a multimeter to check for proper voltage and continuity in the IAC circuit. If no issues are found, test the valve itself.
5. Can I drive my Mitsubishi with a P0508 code?
Driving with a P0508 code is not recommended, as it can cause stalling or rough idling, which might lead to unsafe driving conditions.
6. How do I fix the P0508 code in my Mitsubishi?
Repairs may include cleaning or replacing the Idle Air Control Valve, repairing damaged wiring or connectors, or reprogramming or replacing the ECM if necessary.
7. How much does it cost to repair a P0508 code on a Mitsubishi?
The cost varies but typically ranges from $150 to $400, depending on whether the IAC valve needs replacement or if wiring repairs are required.
8. Can cleaning the Idle Air Control Valve fix the P0508 code?
Yes, if the valve is dirty but otherwise functional, cleaning it can sometimes resolve the issue.
9. What tools are needed to fix a P0508 code in a Mitsubishi?
You may need a multimeter, OBDII scanner, basic hand tools, and possibly a replacement IAC valve.
10. Will clearing the P0508 code with a scanner fix the problem?
Clearing the code will remove the warning temporarily, but if the underlying issue isn’t addressed, the code will return.
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