P1273 – OBD-II DTC

OBD-II DTC P1273 – Cylinder #8 High To Low Side Short

DTC P1273 meaning

DTC P1273 refers to a diagnostic trouble code indicating a high to low side short in the cylinder #8 fuel injector circuit. This code is part of the On-Board Diagnostics II (OBD-II) system, which monitors various components of the vehicle’s engine and emissions systems. A high to low side short suggests that there is an electrical fault causing the injector to receive incorrect voltage levels, potentially leading to improper fuel delivery and engine performance issues.

DTC P1273 symptoms

Common symptoms associated with DTC P1273 may include:

• Engine misfires or rough idling
• Decreased engine performance
• Increased fuel consumption
• Check Engine Light (CEL) illuminated
• Potential stalling or difficulty starting the engine

DTC P1273 causes

Several factors can lead to the occurrence of DTC P1273, including:

• Short circuit in the wiring harness of the cylinder #8 injector
• Faulty fuel injector for cylinder #8
• Defective engine control module (ECM)
• Corroded or damaged electrical connectors
• Issues with the fuel injector driver circuit

DTC P1273 seriousness

DTC P1273 is considered a serious issue as it can lead to significant engine performance problems. If left unaddressed, it may result in:

• Increased emissions
• Potential engine damage due to improper fuel delivery
• Reduced fuel efficiency
• Inability to pass emissions tests

How to diagnose DTC P1273

To diagnose DTC P1273, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the P1273 code.
2. Inspect the wiring and connectors for cylinder #8 injector for any visible damage or corrosion.
3. Check the resistance of the injector to ensure it is within specifications.
4. Test the voltage and ground at the injector connector while the engine is running.
5. Examine the ECM for any faults or issues that may affect the injector operation.

How to fix DTC P1273 step-by-step instructions

To fix DTC P1273, follow these step-by-step instructions:

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 cylinder #8 injector.
3. If the injector is faulty, replace it with a new one.
4. Test the injector driver circuit from the ECM to ensure proper operation.
5. Reconnect the battery and clear the DTC using an OBD-II scanner.
6. Start the engine and monitor for any reoccurrence of the P1273 code.

How to erase DTC P1273

To erase DTC P1273, 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 ensure the code does not return.

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