P1588 Code - Throttle Control Unit Detected Loss of Return Spring
Quick Answer
The Powertrain Control Module (PCM) tests the electronic throttle for the ability of the throttle plate to return to the default (limp home) position from both the open and closed positions. Common causes include Faulty Throttle Control Unit, Throttle Control Unit harness is open or shorted, Throttle Control Unit circuit poor electrical connection. 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
- P1588 indicates Throttle Control Unit Detected Loss of Return Spring.
- Common causes
- Common causes include Faulty Throttle Control Unit, Throttle Control Unit harness is open or shorted, Throttle Control Unit circuit poor electrical connection.
- 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 P1588 Description
What are the Possible Causes of the DTC P1588?
- Faulty Throttle Control Unit
- Throttle Control Unit harness is open or shorted
- Throttle Control Unit circuit poor electrical connection
How to Fix the DTC P1588?
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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1588 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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Need Help with the Code?
Get the P1588 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- P1588 Buick — Cruise Control Clutch Control Circuit High
- P1588 Cadillac — Cruise Control Clutch Control Circuit High
- P1588 Chevrolet — Cruise Control Clutch Control Circuit High
- P1588 Ford — Throttle Control Unit Detected Loss of Return Spring
- P1588 GMC — Cruise Control Clutch Control Circuit High
- P1588 Honda — Motor Power Inverter Module Current Signal Circuit High Input
- P1588 Lincoln — Throttle Control Unit Detected Loss of Return Spring
- P1588 Mercury — Throttle Control Unit Detected Loss of Return Spring
Frequently Asked Questions about P1588 Code
1. What are the common symptoms of OBDII code P1588 (Throttle Control Unit Detected Loss of Return Spring)?
- Common symptoms include a noticeable decrease in engine performance, reduced throttle response, and the illumination of the check engine light.
2. What are the possible causes of OBDII code P1588?
- The code P1588 can be triggered by a faulty throttle control unit, a malfunctioning throttle position sensor, a damaged or broken return spring, or issues with the throttle body.
3. How serious is OBDII code P1588?
- While the vehicle may still be drivable with this code, it is important to address it promptly as it can lead to decreased performance and potential safety hazards if not resolved.
4. Can I continue driving with OBDII code P1588 present in my vehicle?
- It is generally not recommended to continue driving with this code present, as it can impact your vehicle's performance and fuel efficiency. It is best to have the issue diagnosed and repaired as soon as possible.
5. How can I diagnose the cause of OBDII code P1588 at home?
- You can start by checking the throttle control unit, throttle position sensor, and return spring for any visible damage. However, a professional diagnostic scan tool may be necessary for a more accurate diagnosis.
6. Is it possible to repair OBDII code P1588 on my own?
- Depending on your level of automotive expertise, you may be able to address this code on your own by replacing the faulty components. However, it is recommended to seek the help of a qualified mechanic for proper diagnosis and repair.
7. What is the typical cost to repair OBDII code P1588?
- The cost of repairing this code can vary depending on the specific cause and the labor rates in your area. It is advisable to obtain quotes from different mechanics to determine the most cost-effective solution.
8. Can a dirty throttle body cause OBDII code P1588 to appear?
- Yes, a dirty or clogged throttle body can lead to issues with the throttle control unit and trigger code P1588. Regular maintenance, such as cleaning the throttle body, can help prevent this code from recurring.
9. Are there any safety concerns associated with OBDII code P1588?
- While the code itself may not pose immediate safety risks, addressing it promptly is crucial to maintaining the overall performance and drivability of your vehicle.
10. How long can I safely drive with OBDII code P1588 before getting it repaired?
- It is recommended to address the issue as soon as possible to prevent further damage and ensure optimal performance of your vehicle. Driving with the code unresolved for an extended period may lead to more severe issues down the line.
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