B1220 – OBD-II DTC

OBD-II DTC B1220 – Fuel Tank Pressure Sensor Circuit Open

DTC B1220 meaning

DTC B1220 refers to a diagnostic trouble code indicating an open circuit in the fuel tank pressure sensor circuit. This sensor is responsible for monitoring the pressure within the fuel tank, which is crucial for the proper functioning of the vehicle’s evaporative emission control system. An open circuit means that there is a break in the electrical connection, preventing the sensor from sending accurate data to the engine control module (ECM).

DTC B1220 symptoms

Common symptoms associated with DTC B1220 may include:

• Check Engine Light illuminated
• Increased fuel consumption
• Difficulty starting the engine
• Rough idling or stalling
• Fuel odor due to potential leaks

DTC B1220 causes

Several factors can lead to the occurrence of DTC B1220, including:

• Faulty fuel tank pressure sensor
• Damaged wiring or connectors in the sensor circuit
• Corrosion at electrical connections
• Issues with the engine control module (ECM)
• Fuel tank leaks or other related issues

DTC B1220 seriousness

DTC B1220 is considered a moderate issue. While it may not cause immediate engine failure, it can lead to increased emissions and fuel inefficiency. Ignoring this code can result in more severe problems over time, including potential damage to the fuel system or the ECM.

How to diagnose DTC B1220

To diagnose DTC B1220, follow these steps:

• Use an OBD-II scanner to confirm the presence of the code.
• Inspect the fuel tank pressure sensor and its wiring for visible damage.
• Check for any additional trouble codes that may provide more context.
• Test the fuel tank pressure sensor with a multimeter to ensure it is functioning correctly.
• Examine the ECM for any faults or issues.

How to fix DTC B1220 step-by-step instructions

To fix DTC B1220, follow these step-by-step instructions:

1. Clear the DTC using an OBD-II scanner.
2. Inspect the fuel tank pressure sensor and wiring for any signs of damage or corrosion.
3. If damaged, replace the fuel tank pressure sensor.
4. Repair or replace any damaged wiring or connectors in the circuit.
5. Reconnect all components and ensure secure connections.
6. Start the vehicle and monitor for any reoccurrence of the DTC.

How to erase DTC B1220

To erase DTC B1220, follow these steps:

• Connect an OBD-II scanner to the vehicle’s diagnostic port.
• Turn on the ignition without starting the engine.
• Access the scanner’s menu and select the option to clear or erase trouble codes.
• Confirm the action and wait for the scanner to complete the process.
• Disconnect the scanner and start the vehicle to ensure the code does not return.

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