B1976 OBD-II Trouble Code: Passenger’s Seat Forward Switch Circuit Short to Battery

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

Red-stars EXCELLENT RATING ON

Cost of diagnosing the B1976 code

B1976 is a diagnostic trouble code (DTC) for "Passenger’s Seat Forward Switch Circuit Short to Battery". 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.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$20.00
Toyota$20.00
BMW$20.00
SCHEDULE B1976 DIAGNOSTIC Get a fair and transparent estimate upfront

B1976 code definition

The B1976 trouble code detects a passenger seat forward switch circuit error.

What the B1976 code means

The B1976 code is a standard OBD-II trouble code that notes a circuit malfunction from the passenger seat forward switch. The passenger seat forward switch controls the horizontal movement of the front passenger seat. When the switch, which is usually located on the outboard side of the passenger seat, is deployed, the seat will move forward. If the body control module or powertrain control module (PCM) detect a circuit error from the passenger seat forward switch, then it is likely that the B1976 trouble code will be stored.

What causes the B1976 code?

The B1976 trouble code is commonly caused by one of two issues. The first cause is damaged electrical parts, such as blown fuses, shorted wires, and open connectors. These electrical parts can be in the passenger seat forward switch, or in the power seat system. The second common cause is a malfunctioning passenger seat forward switch. While quite rare, the code is also sometimes triggered by a defective body control module.

What are the symptoms of the B1976 code?

A vehicle that has a detected B1976 trouble code will almost always have an inoperable seat forward switch for the front passenger seat, which means the seat cannot be adjusted forward. It is also likely that the seat cannot be adjusted rearward, either. In many cases, this code is also accompanied by the check engine soon warning light illuminating on the vehicle’s gauge cluster.

How does a mechanic diagnose the B1976 code?

The B1976 code will be diagnosed using a standard OBD-II trouble code scanner. A certified technician will use the scanner to look at the freeze frame data and gather information about the code, while also checking to see if any other trouble codes are present. If multiple codes are detected, then the mechanic will inspect them in the order that they are displayed in. The trouble codes should then be reset, and the vehicle restarted, so the B1976 code can be searched for. If the code is no longer present, then it was likely detected inaccurately, or represents an intermittent error.

If the B1976 code remains, then the mechanic will begin by visually inspecting all of the electrical components in the passenger seat forward switch and power seat systems. All damaged or otherwise compromised parts will need to be replaced. If all of the electrical components are in good, working order, then the passenger seat forward switch has most likely failed.

After any parts are replaced or repaired, the trouble codes should once more be reset, the vehicle restarted, and the code checked for. By doing this, the technician will know as soon as the problem has been fully resolved.

Common mistakes when diagnosing the B1976 code

The most common mistake that is made in diagnosing the B1976 trouble code is the failure to properly comply with the OBD-II diagnosis protocol. It is imperative that mechanics follow the protocol at all times, to help ensure accurate diagnoses and repairs.

It is fairly common for electrical failures to be overlooked, and passenger seat forward switches to be unnecessarily replaced as a result.

How serious is the B1976 code?

The B1976 trouble code will not present any drivability issues, but the front passenger seat will likely not be able to be adjusted forward or rearward. If the seat is stuck too far forward, it may be inaccessible for the passenger. If the seat is stuck too far rearward, it may be unsafe for a passenger, as the airbag may not reach the person (it also may render the backseat unusable in this position). When the code is detected, an inspection should be scheduled.

What repairs can fix the B1976 code?

Repairs for the B1976 trouble code include:

Additional comments for consideration regarding the B1976 code

This code is a manufacturer specific trouble code, which means that the definition varies from automaker to automaker. The B1976 code suggests a passenger seat forward switch circuit malfunction in some vehicles, but an entirely different body problem in other vehicles. As always, the mechanic should be aware of the vehicle that is being worked on when diagnosing this trouble code.

Need help with a B1976 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.

trouble codes
OBD-II
B1976

No more waiting rooms! Our mechanics will come to you to diagnose and fix the B1976 code.

SCHEDULE B1976 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.8/5

Number of Reviews

5,170

Rating Summary
4,765
197
50
27
131
4,765
197
50
27
131

Fred

16 years of experience
364 reviews
Fred
16 years of experience
Mercedes-Benz E500 - Check Engine Light is on - Conroe, Texas
Fred was very friendly and thorough to get to the root of the issue. Even when he could not find a fault to why my engine light was on, he went above and beyond to make absolutely sure that the concern was minimized. Turns out, all that needed to be done was a reset but his diagnostic to address my issues was very intricate and appreciated.

David

17 years of experience
37 reviews
David
17 years of experience
Chevrolet Cruze - Check Engine Light is on - Aurora, Colorado
David was on time, professionalisms & honest! I would definitely request him again and pass along to friends/family.

John

18 years of experience
18 reviews
John
18 years of experience
Dodge Ram 1500 - Check Engine Light is on - Memphis, Tennessee
Demonstrated good integrity. Advised me when work I thought needed done was unnecessary and was helpful in identifying issues that needed to be addressed

Robert

21 years of experience
17 reviews
Robert
21 years of experience
Chrysler 200 - Check Engine Light is on - Fort Worth, Texas
Robert did a good job working on my car and letting me know what's needed to keep my car driving smoothly.


More related articles

B1904 OBD-II Trouble Code: Air Bag Crash Sensor #2 Feed/Return Circuit Failure
B1904 means there is a circuit malfunction in the #2 airbag crash sensor, likely due to damaged electrical components or a bad sensor.
P0931 OBD-II Trouble Code: Gear Shift Lock Solenoid Circuit High
P0931 means that there is an issue with the gear shift lock solenoid circuit due to a faulty solenoid, wiring issues, or faulty break light switch.
P0546 OBD-II Trouble Code: Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 1
P0546 code means that the malfunction is related to the exhaust gas temperature sensor circuit due to loose terminals, wiring issues, or faulty sensor

Related questions

OBDII fault codes

It is very possible that the intake air temperature sensor or the barometric pressure sensor will require replacement. What is likely happening is that there is a corrolation between these two sensors either because one of them is malfunctioning, there...

P1659 ETCS RELAY OFF MALFUNCTION

Hi there, thanks for writing in. Unfortunately since your vehicle seems to be one not sold in the United States, I can't access any repair information for your N-WGN. The information should be readily available in a service manual for...

How to repair the P2238 trouble code in my car

Hi there. This P2238 code is set when the engine computer detects a short circuit on the heater for the 02 or AF sensor.The short is generally in the sensor itself and replacement corrects the condition. However, there could be...

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