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B1220 is a diagnostic trouble code (DTC) for "Fuel Tank Pressure Sensor Circuit Open". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
The B1220 trouble code indicates an incomplete (or "open") circuit has been detected in the vehicle's fuel tank pressure sensor.
The fuel tank pressure sensor detects leaks in the tank and aids the vehicle's Evaporative Emissions (EVAP) system in vaporizing fuel to help lower pollution. In the case of an incomplete pressure sensor circuit, this system will be weakened.
Faulty, disconnected or damaged wiring is most often the case for an incomplete sensor circuit. The fuel tank pressure sensor circuit itself may be faulty. If this is the case, it should be promptly replaced.
The B1220 code typically results in harsher exhaust and engine noise, a stronger gas smell when the engine is active, decreased fuel efficiency and the sensor's inability to regulate and report issues with fuel vapour in the fuel tank. A B1220 trouble code will be logged on the vehicle's diagnostic computer and a check engine lamp will be illuminated to alert the vehicle operator to the problem.
A mechanic can verify the B1220 code first by using an OBD-II code reader to read any stored codes on the vehicle's computer. The wiring should be thoroughly inspected for signs of disconnection or damage, preferably using a voltmeter in order to precisely pinpoint the area where the circuit stops. Any other reported codes relating to the fuel tank pressure should be taken under consideration as well.
The body-related trouble codes are often specific to certain models of vehicle. One code may carry different descriptions depending on the particular make of car. As a result, one body-related concern may be replaced mistakenly in lieu of the actual reported issue.
Depending on the severity of the pressure sensor circuit malfunction, the vehicle's emissions may be more visible and pollutant. Although this shouldn't significantly impact the vehicle's drivability, it can make the vehicle's operation a lot dirtier. It is recommended that a B1220 code be resolved as soon as possible.
If any of the wiring or components have been identified as being faulty, damaged, disconnected or faulty in the fuel tank pressure sensor circuit, they should be repaired or replaced accordingly. In some cases, a fuel tank pressure sensor circuit issue may be caused by a vapour lock problem and an improperly secured fuel cap. Leave the fuel cap open for an hour then secure it tightly.
Retest the vehicle after repairs have been completed to ensure the problem has gone away. If the code returns, it is a sign that not all of the causes were solved during the first round of repairs.
B-class trouble codes are often specific to certain specific types of vehicle. The meaning of a B1220 code may vary depending on the specific make of car.
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