P1373 – OBD-II DTC

OBD-II DTC P1373 – Ignition Spare

DTC P1373 meaning

DTC P1373 refers to a specific diagnostic trouble code related to the ignition system of a vehicle. This code indicates that there is an issue with the ignition spare, which is a component responsible for ensuring proper ignition timing and operation. The code is often triggered when the Engine Control Module (ECM) detects a malfunction in the ignition system that could affect engine performance and emissions.

DTC P1373 symptoms

Common symptoms associated with DTC P1373 may include:

• Engine misfires
• Difficulty starting the engine
• Reduced engine power
• Increased fuel consumption
• Illuminated check engine light

DTC P1373 causes

Several factors can lead to the triggering of DTC P1373, including:

• Faulty ignition coil
• Wiring issues or damaged connectors
• Malfunctioning spark plugs
• Problems with the Engine Control Module (ECM)
• Incorrect ignition timing settings

DTC P1373 seriousness

DTC P1373 can be considered serious as it may lead to significant engine performance issues. If left unaddressed, it can result in:

• Increased emissions
• Potential engine damage
• Decreased fuel efficiency
• Failure to pass emissions tests

How to diagnose DTC P1373

To diagnose DTC P1373, follow these steps:

• Use an OBD-II scanner to confirm the presence of the code.
• Check for any additional trouble codes that may provide more context.
• Inspect the ignition system components, including coils, plugs, and wiring.
• Test the ignition timing using a timing light.
• Examine the ECM for any signs of malfunction or software issues.

How to fix DTC P1373 step-by-step instructions

To fix DTC P1373, follow these step-by-step instructions:

1. Clear the DTC using an OBD-II scanner.
2. Inspect and replace any faulty ignition coils.
3. Check and replace worn or damaged spark plugs.
4. Examine wiring and connectors for damage and repair as necessary.
5. Adjust ignition timing to manufacturer specifications.
6. Re-scan the vehicle to ensure the code does not return.

How to erase DTC P1373

To erase DTC P1373, follow these steps:

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

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