B1220 OBD-II Trouble Code: Fuel Tank Pressure Sensor Circuit Open

Our certified mechanics come to you · Get a fair and transparent estimate upfront

Red-stars EXCELLENT RATING ON

Cost of diagnosing the B1220 code

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 for $114.99 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.0 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford $114.99 $20.0
Toyota $114.99 $20.0
BMW $124.99 $20.0
SCHEDULE B1220 DIAGNOSTIC Get a fair and transparent estimate upfront

B1220 code definition

The B1220 trouble code indicates an incomplete (or "open") circuit has been detected in the vehicle's fuel tank pressure sensor.

What the B1220 code means

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.

What causes the B1220 code?

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.

What are the symptoms of the B1220 code?

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.

How does a mechanic diagnose the B1220 code?

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.

Common mistakes when diagnosing the B1220 code

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.

How serious is the B1220 code?

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.

What repairs can fix the B1220 code?

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.

Additional comments for consideration regarding the B1220 code

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.

Need help with a B1220 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

OBD-II
trouble codes
B1220

No more waiting rooms! Our mechanics will come to you to diagnose and fix the B1220 code.

SCHEDULE B1220 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating

(7400)

Rating Summary
6879
249
58
41
173
6879
249
58
41
173
 at YourMechanic

David

13 years of experience
393 reviews
David
13 years of experience
Chevrolet Malibu L4-2.4L - Check Engine Light is on Inspection - Marietta, Georgia
He explained everything to me in detail on what I needed to know about my car. Definitely recommend him for getting the job done.
 at YourMechanic

Raymond

37 years of experience
402 reviews
Raymond
37 years of experience
Toyota Camry L4-2.2L - Check Engine Light is on - Las Vegas, Nevada
Raymond did a great job however I was charged for two hours labor and he was only here less than 45 minutes. should I expect this on future appointments with your mechanic ?
 at YourMechanic

Shane

17 years of experience
217 reviews
Shane
17 years of experience
Volkswagen EuroVan V6-2.8L - Check Engine Light is on Inspection - Austin, Texas
Arrived on time. Explained the issues he found and how he will fix it. I have parts on order and will schedule an appointment to have Shane install the parts when they arrive.
 at YourMechanic

Kanstantsin

19 years of experience
51 reviews
Kanstantsin
19 years of experience
Ford F-150 V8-4.6L - Check Engine Light is on Inspection - Littleton, Colorado
Kanstantsin arrived early. Was very courteous and professional. Will highly recommend to anyone. Thank you Kanstantsin.


More related articles

P2667 OBD-II Trouble Code: Fuel Shutoff Valve B Control Circuit High
P2667 means there is a problem with the fuel shut off valve usually after a rear end collision or other electrical issues or problem.
P2780 OBD-II Trouble Code: Downshift Switch Circuit Low
P2780 means that the PCM has found an issue with the downshift switch circuit’s electrical circuit due to damaged, corroded, or shorted wiring.
P0991 OBD-II Trouble Code: Transmission Fluid Pressure Sensor/Switch E Circuit Intermittent
P0991 means that the PCM has detected a variation in the transmission fluid pressure due to a faulty pressure sensor, or transmission failure

Related questions

Car shut off while driving
Without additional information, it is hard to say what could have caused this. Your car has a variety of sensors that can cause it to shut down depending on whether or not everything is functioning correctly. I would suggest having...
Had new Mass airflow sensor put on an now I'm getting a code p0171 what could it be
This relates to a lean fuel condition which can be caused by many different things such as: Intake air leaks Faulty front heated oxygen sensor Ignition misfiring (https://www.yourmechanic.com/services/engine-is-misfiring-inspection) Faulty fuel injectors (https://www.yourmechanic.com/services/fuel-injector-replacement) Exhaust gas leaks (https://www.yourmechanic.com/services/oil-fluid-leak-inspection) Incorrect fuel pressure Lack...
Code P02A9 Cylinder 4 Balance-Fuel Trim at Limit
The code definition specifically indicates the number four fuel injector is leaking. Fuel trims are used to indicate how much the PCM (powertrain control module) needs to adjust the fuel duty cycle to maintain the proper air fuel ratio. Duty...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com