P1493 – OBD-II DTC

OBD-II DTC P1493 – EGRA Circuit Malfunction

DTC P1493 meaning

DTC P1493 refers to a malfunction in the Evaporative Emission Control System (EVAP) related to the Electronic Gas Recirculation Actuator (EGRA). This code indicates that the engine control module (ECM) has detected an issue with the circuit that controls the EGRA, which is responsible for managing the flow of exhaust gases back into the intake manifold to reduce emissions.

DTC P1493 symptoms

Common symptoms associated with DTC P1493 may include:

• Check Engine Light (CEL) illuminated
• Increased emissions
• Rough idling or stalling
• Decreased fuel efficiency
• Failed emissions test

DTC P1493 causes

Several factors can lead to the triggering of DTC P1493, including:

• Faulty EGRA or its wiring
• Short circuit or open circuit in the EGRA circuit
• Defective ECM
• Vacuum leaks in the EVAP system
• Corroded or damaged connectors

DTC P1493 seriousness

DTC P1493 can be considered serious due to its potential impact on vehicle emissions and performance. If left unaddressed, it may lead to:

• Increased environmental pollution
• Potential engine damage
• Failure to pass emissions testing
• Reduced fuel economy

How to diagnose DTC P1493

To diagnose DTC P1493, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the P1493 code.
2. Inspect the EGRA and its wiring for any visible damage or disconnections.
3. Check for any additional DTCs that may provide more context.
4. Test the EGRA operation using a multimeter to check for proper voltage and resistance.
5. Inspect the EVAP system for vacuum leaks or other issues.

How to fix DTC P1493 step-by-step instructions

To fix DTC P1493, follow these steps:

1. Repair or replace any damaged wiring or connectors related to the EGRA.
2. Replace the EGRA if it is found to be faulty.
3. Address any vacuum leaks in the EVAP system.
4. Clear any additional DTCs that may have been triggered.
5. Test drive the vehicle to ensure the issue is resolved and the Check Engine Light does not reappear.

How to erase DTC P1493

To erase DTC P1493, 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 codes.
5. Disconnect the scanner and start the vehicle to verify that the Check Engine Light is off.

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.