Diagnostic trouble code P1580 is a manufacturer-specific powertrain fault code. Because it is manufacturer-specific, its exact definition depends entirely on the vehicle make, model, and application.
Exact vehicle application must be verified before diagnosis. The code identifies a detected condition in a specific subsystem, but further testing is required to identify the root cause.
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Key Takeaways
- P1580 is a manufacturer-specific code, meaning its definition varies between automakers like General Motors, Volkswagen, and Ford.
- On GM applications, it indicates a cruise move circuit low voltage fault.
- On VW and Audi applications, it indicates a throttle actuator bank 1 malfunction.
- On Ford and Mercedes applications, it points to an electronic throttle monitor or throttle valve actuator fault.
- Diagnosis requires verifying the exact factory definition and testing the relevant circuits or throttle components.
P1580 Code Description and Implications
Because P1580 is manufacturer-specific, there is no single universal definition. This error code identifies a detected condition, but the exact monitored system depends on the vehicle make and model.
Some General Motors applications: P1580 indicates a “Cruise Move Circuit Low Voltage” fault, meaning the module detects insufficient voltage in the cruise control actuator circuit.
Certain Volkswagen and Audi applications: P1580 indicates a “Throttle Actuator Bank 1 Malfunction,” pointing to an issue with the electronic throttle body motor or its control circuit.
Some Ford and Mercedes-Benz applications: P1580 indicates an “Electronic Throttle Monitor PCM Override” or a throttle valve actuator fault, relating to the electronic throttle control system.
Common Causes of the P1580 Code
The underlying cause depends entirely on the verified factory definition for the specific vehicle application.
For GM applications, possible causes include damaged wiring in the cruise control circuit, a failing cruise control actuator, or poor electrical connections at the module.
For VW and Audi applications, causes may involve carbon buildup restricting the throttle plate, a failing throttle body motor, or damaged throttle position sensor wiring.
For Ford and Mercedes applications, causes can include a failing electronic throttle body, a binding throttle cable, or a software calibration issue in the powertrain control module.
Symptoms Associated With P1580
Symptoms vary widely depending on the underlying system fault and the vehicle manufacturer.
On GM applications with a cruise move circuit fault, symptoms typically include an inoperative cruise control system and an illuminated cruise control indicator light.
On VW and Audi applications with a throttle actuator fault, symptoms can include rough idling, the engine entering limp mode, or severe hesitation during acceleration.
On Ford and Mercedes applications, symptoms may include the electronic throttle warning light illuminating, reduced engine power, or the vehicle stalling.
Diagnosing the P1580 Trouble Code
Diagnosis must begin by confirming the exact factory definition for the specific make, model, and year.
For GM applications, technicians test the cruise move circuit for voltage drops, inspect the cruise actuator wiring, and verify the module output using a scan tool.
For VW and Audi applications, technicians inspect the electronic throttle body for carbon binding, test the throttle motor resistance, and monitor the throttle position sensor live data.
For Ford and Mercedes applications, technicians check the throttle cable for binding, test the electronic throttle body circuits, and verify the PCM software calibration.
Repairing the P1580 Issue
Repairs must follow confirmed diagnosis based on the specific vehicle application.
If a cruise move circuit fault is confirmed on a GM application, the damaged wiring must be repaired or the cruise control actuator replaced.
If a throttle actuator fault is confirmed on a VW or Audi, the throttle body must be cleaned or replaced, and the wiring repaired.
If an electronic throttle fault is confirmed on a Ford or Mercedes, the throttle body assembly may require replacement, or the PCM may need a software update.
Cost Considerations for P1580 Repairs
Cost depends on diagnostic time, component accessibility, required parts, programming requirements, and labor.
Repairing a cruise control circuit wire may require minimal labor depending on accessibility.
Conversely, replacing an electronic throttle body assembly and performing the required module adaptations requires specialized equipment and significant labor.
Prevention Strategies for Future Occurrences
Some electrical and mechanical failures cannot be reliably prevented.
For applications using an electronic throttle body, keeping the intake tract clean and using high-quality fuel can help reduce carbon buildup on the throttle plate.
Inspecting exposed wiring harnesses for chafing or heat damage can help prevent intermittent circuit faults in the cruise control or throttle systems.
Troubleshooting Tips and Best Practices
Never assume P1580 is a universal cruise control code. Always verify the exact definition for the specific vehicle before purchasing parts.
Do not ignore related codes. A throttle actuator fault may appear alongside throttle position sensor codes, while a cruise circuit fault may appear alongside other cruise control module codes.
Check for technical service bulletins applicable to your exact vehicle application, as manufacturers frequently release updated throttle bodies or revised wiring harnesses for recurring faults.
More OBD-II Codes
| P1542 | P1586 | P1565 | P1500 |
| P1529 | P1587 | P1555 | P1504 |
| P1525 | P1588 | P1511 | P1506 |
| P1520 | P1605 | P1512 | P1507 |
| P1519 | P1606 | P1513 | P1516 |
| P1478 | P1608 | P1574 | P1518 |
Frequently Asked Questions
Is P1580 a generic or manufacturer-specific code?
No. P1580 is a manufacturer-specific code. Its exact definition varies significantly between automakers, so the factory service information for the specific vehicle must be consulted.
Can I drive my car with a P1580 code?
It depends on the application. If P1580 indicates an electronic throttle fault, the engine may enter limp mode or stall. If it is a cruise circuit fault, only the cruise control may be disabled.
Will disconnecting the battery clear the P1580 code?
Disconnecting the battery may temporarily clear the code, but it does not repair the underlying electrical or mechanical fault. The code will return once the monitor runs again.
Can a dirty throttle body cause a P1580 code?
On VW and Audi applications monitoring the throttle actuator, excessive carbon buildup can restrict the throttle plate movement, causing the module to detect an actuator malfunction.
Does P1580 always mean the cruise control module is bad?
No. While a failing actuator or module is a cause on specific GM applications, the code can also indicate damaged wiring, a failing electronic throttle body, or a binding throttle cable.
What Should You Do About the P1580 Code?
Confirm the exact factory definition and diagnostic procedure for your specific vehicle application. Because P1580 is manufacturer-specific, identifying whether it relates to a cruise control circuit, a throttle actuator, or an electronic throttle monitor is mandatory.
Follow the applicable manufacturer diagnostic steps to test the relevant system and components. Once the root cause is confirmed, complete the necessary repairs and verify that the system operates correctly and the code does not return.
