P1702 – OBD-II DTC

OBD-II DTC P1702 – Turbo Control Solenoid Circuit Malfunction

DTC P1702 meaning

DTC P1702 refers to a malfunction in the Turbo Control Solenoid Circuit. This code indicates that the Engine Control Module (ECM) has detected an issue with the electrical circuit that controls the turbocharger’s wastegate. The turbo control solenoid is responsible for regulating the boost pressure produced by the turbocharger, which is crucial for optimal engine performance and efficiency.

DTC P1702 symptoms

Common symptoms associated with DTC P1702 may include:

• Reduced engine power or performance
• Increased turbo lag
• Check Engine Light (CEL) illuminated
• Unusual engine noises
• Poor fuel economy

DTC P1702 causes

Several factors can lead to the triggering of DTC P1702, including:

• Faulty turbo control solenoid
• Wiring issues, such as shorts or open circuits
• Corroded or loose electrical connectors
• Faulty Engine Control Module (ECM)
• Vacuum leaks affecting the wastegate operation

DTC P1702 seriousness

DTC P1702 is considered a moderate to serious issue. While it may not cause immediate engine failure, it can lead to reduced performance and efficiency. Ignoring this code can result in further damage to the turbocharger or other engine components, potentially leading to costly repairs.

How to diagnose DTC P1702

To diagnose DTC P1702, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the P1702 code.
2. Inspect the turbo control solenoid and its wiring for visible damage.
3. Check electrical connectors for corrosion or loose connections.
4. Test the turbo control solenoid for proper operation using a multimeter.
5. Inspect for vacuum leaks in the system that may affect the wastegate.
6. Clear the code and perform a test drive to see if the code reappears.

How to fix DTC P1702 step-by-step instructions

To fix DTC P1702, follow these steps:

1. Disconnect the battery to ensure safety while working on the electrical system.
2. Inspect and repair any damaged wiring or connectors related to the turbo control solenoid.
3. Replace the turbo control solenoid if it is found to be faulty.
4. Check and repair any vacuum leaks in the wastegate system.
5. Reconnect the battery and clear the DTC using an OBD-II scanner.
6. Perform a test drive to ensure the issue is resolved and the code does not return.

How to erase DTC P1702

To erase DTC P1702, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the ignition without starting the engine.
3. Navigate to the “Erase Codes” or “Clear DTCs” option on the scanner.
4. Confirm the action to clear the trouble codes.
5. Disconnect the scanner and start the engine to verify that the code does not reappear.

Recommended tools for OBD-II diagnostics

Explore our expert picks: The Best OBD2 Scanners for 2025

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.