P1193 – OBD-II DTC

OBD-II DTC P1193 – Calibration Memory Fault

DTC P1193 meaning

DTC P1193 refers to a Calibration Memory Fault in the On-Board Diagnostics II (OBD-II) system. This code indicates that the Engine Control Module (ECM) has detected an issue with the calibration data stored in its memory. The calibration data is crucial for the ECM to manage engine performance, emissions, and fuel efficiency effectively.

DTC P1193 symptoms

Common symptoms associated with DTC P1193 may include:

• Check Engine Light illuminated
• Reduced engine performance
• Increased fuel consumption
• Rough idling or stalling
• Difficulty starting the engine

DTC P1193 causes

Several factors can lead to the occurrence of DTC P1193, including:

• Corrupted or missing calibration data in the ECM
• Faulty ECM or software issues
• Electrical issues such as short circuits or poor connections
• Recent repairs or modifications that affect the ECM
• Battery voltage issues or power interruptions

DTC P1193 seriousness

DTC P1193 is considered a moderate to serious issue. While it may not cause immediate engine failure, it can lead to poor engine performance and increased emissions. Ignoring this code can result in further damage to the engine or related components, as well as potential failure to pass emissions tests.

How to diagnose DTC P1193

To diagnose DTC P1193, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the P1193 code.
2. Check for any additional trouble codes that may provide more context.
3. Inspect the ECM for any visible damage or loose connections.
4. Verify the integrity of the calibration data using manufacturer-specific diagnostic tools.
5. Check the vehicle’s battery voltage and electrical connections.
6. Perform a visual inspection of wiring and connectors related to the ECM.

How to fix DTC P1193 step-by-step instructions

To fix DTC P1193, follow these steps:

1. Clear the DTC using an OBD-II scanner.
2. Recheck the calibration data in the ECM and reprogram if necessary.
3. Repair any identified electrical issues, such as damaged wiring or poor connections.
4. Replace the ECM if it is found to be faulty.
5. Test drive the vehicle to ensure the issue is resolved and the Check Engine Light does not reappear.

How to erase DTC P1193

To erase DTC P1193, 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 option to clear or erase trouble codes on the scanner.
4. Confirm the action to erase the DTC.
5. Disconnect the scanner and start the engine to verify that the code does not return.

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.