P0638 Mitsubishi Code - Throttle Actuator Control Range/Performance
Quick Answer
The Powertrain Control Module (PCM) compares the actual Throttle Possition (TP) with the target TP when the engine is running. Common causes include Drive-by-wire control system malfunction, Throttle actuator malfunction, Throttle valve malfunction. 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
- P0638 Mitsubishi indicates Throttle Actuator Control Range/Performance.
- Common causes
- Common causes include Drive-by-wire control system malfunction, Throttle actuator malfunction, Throttle valve malfunction.
- 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 P0638 Mitsubishi Description
What are the Possible Causes of the DTC P0638 Mitsubishi?
- Drive-by-wire control system malfunction
- Throttle actuator malfunction
- Throttle valve malfunction
- PCM malfunction
How to Fix the DTC P0638 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 P0638 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.
Need more information about the P0638 Mitsubishi code?
Need more information on how to fix the P0638 Mitsubishi code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0638 Mitsubishi code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0638 Mitsubishi Code
1. What are the common symptoms of OBDII code P0638 in a Mitsubishi related to throttle actuator control range/performance?
- Common symptoms include poor acceleration, rough idling, stalling, and the vehicle going into limp mode.
2. What are the potential causes of OBDII code P0638 in a Mitsubishi related to throttle actuator control range/performance?
- Possible causes include a faulty throttle actuator, damaged wiring or connectors, a malfunctioning throttle position sensor, or issues with the engine control module.
3. How can I diagnose the OBDII code P0638 in a Mitsubishi related to throttle actuator control range/performance?
- Diagnosing this code usually involves using an OBDII scanner to retrieve the code, checking the throttle actuator and related components for any visible damage, and performing electrical tests on the components.
4. What are some repair tips for fixing OBDII code P0638 in a Mitsubishi related to throttle actuator control range/performance?
- Repair tips may include replacing the throttle actuator if it is faulty, repairing or replacing damaged wiring or connectors, recalibrating the throttle position sensor, or reprogramming the engine control module.
5. Can I drive my Mitsubishi with OBDII code P0638 related to throttle actuator control range/performance?
- It is not recommended to drive the vehicle with this code present, as it can lead to further damage and potential safety issues. It is best to address the underlying problem as soon as possible.
6. How much does it typically cost to repair OBDII code P0638 related to throttle actuator control range/performance in a Mitsubishi?
- The cost of repair can vary depending on the specific cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.
7. Can I reset the OBDII code P0638 related to throttle actuator control range/performance in a Mitsubishi by disconnecting the battery?
- While disconnecting the battery may clear the code temporarily, it is not a recommended method for fixing the underlying issue. The code is likely to return until the root cause is addressed.
8. Is it safe to continue driving my Mitsubishi if the throttle actuator control range/performance issue is intermittent?
- It is not recommended to continue driving the vehicle if the issue is intermittent, as it can unpredictably affect the performance of the vehicle and potentially lead to dangerous situations.
9. How long does it typically take to repair OBDII code P0638 related to throttle actuator control range/performance in a Mitsubishi?
- The repair time can vary depending on the complexity of the issue and the availability of parts, but it may take a few hours to a full day to diagnose and fix the problem.
10. Will fixing OBDII code P0638 in a Mitsubishi related to throttle actuator control range/performance improve fuel efficiency?
- Yes, addressing the underlying issue causing this code can help improve fuel efficiency by ensuring proper throttle control and engine performance.
Discuss the causes and fixes for P0638 Mitsubishi OBDII Code
-
I have a P0638 engine error code on my Mitsubishi Grandis 2006 (UK model) , Have been told it needs a new throttle body . I fitted a second hand one and same error. It could be second hand throttle body also faulty. But also it could be faulty wiring or faulty engine management system module . Local Mitsubishi dealer will charge £750 plus vat for new throttle body, Can get a new part from Taiwan for around $178 (including postage !).
Can anyone advise what is the best way forward ?
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
