B2022 — rear courtesy light output signal

B2022: B2022 primarily identifies a rear courtesy lighting output problem and normally does not prevent driving. B2022 is stored while the rear courtesy lamp remains dark when it should illuminate

For Ford vehicles

rear courtesy light output signal

vehicle

Is it safe to drive?

Minor lighting fault B2022 primarily identifies a rear courtesy lighting output problem and normally does not prevent driving. Arrange prompt diagnosis, especially if the lamp provides needed cargo-area visibility, and use alternative lighting until the fault is corrected.

Typical symptoms

B2022 is stored while the rear courtesy lamp remains dark when it should illuminate
The rear courtesy lamp flickers or operates intermittently
The lamp changes brightness or shuts off when its connector or wiring is moved
The rear courtesy lamp fails to illuminate while other interior courtesy lights continue working
The lamp remains illuminated after the rear doors or trunk are closed

Common causes

A burned-out bulb or failed LED module inside the rear courtesy lamp
Corrosion, a backed-out pin, or damage in the rear courtesy lamp connector
An open circuit or high resistance in the lamp power feed or ground wiring
A short to ground or an aftermarket lamp overloading the rear courtesy light output
A failed power-feed relay, fuse holder, or related lighting circuit protection
An internal fault in the body control module's rear courtesy lamp driver after wiring tests pass

How to diagnose with an OBD scanner

Confirm the code and related data Connect an OBD scanner, ELM327 adapter with AIScanAuto, or equivalent scan tool. Retrieve B2022 from stored, pending, and history locations, and record any available freeze-frame information before clearing anything.
Inspect the rear courtesy lamp Check the bulb or LED module, lens, housing, connector, and surrounding trim for burns, cracks, moisture, corrosion, or pin damage. Operate the lamp under its normal door, trunk, or switch-controlled conditions.
Test power and ground Use the vehicle wiring diagram and a high-impedance multimeter to identify the correct rear courtesy lamp terminals. Verify the specified feed voltage and check for excessive ground voltage drop while the lamp is commanded on.
Check for wiring faults With power disconnected, inspect continuity, shorts, and high resistance in the lamp circuit. Gently wiggle the harness and connector during testing to reproduce an intermittent condition that may set B2022.
Isolate the control output If the bulb, connector, wiring, fuse, and ground all pass, compare the body control module command with the measured lamp output. Do not replace the controller solely because B2022 is present; first confirm that the output circuit is intact.
Repair and verify Repair the confirmed fault, operate the rear courtesy lamp through all intended conditions, clear B2022 with the scan tool, and rescan. The code should not return when the lamp output and circuit behave as specified.

Approximate repair cost

Estimated independent-shop range for diagnosing and repairing B2022 is USD $50-$300, depending on whether the lamp, connector, wiring, or control module requires service. These figures are estimates only, not verified quotes, and vary by region, vehicle design, and parts availability.

Common questions

Does B2022 prove that the rear courtesy light bulb is defective?

No. B2022 identifies an abnormal rear courtesy light output signal, and the bulb is only one of several possible causes. Wiring, connector corrosion, grounding, and the lamp-control output must also be tested.

Can B2022 be cleared with an ELM327 adapter or AIScanAuto?

The code can often be read and cleared with an ELM327-based scan tool or AIScanAuto, depending on the vehicle and interface. Clear it only after recording the fault and repairing the underlying circuit.

Is it safe to continue driving with B2022 stored?

Usually, yes, because B2022 concerns rear courtesy illumination rather than propulsion or braking. The lighting problem should still be corrected promptly if cargo-area visibility is needed for safe operation.

What confirms that the B2022 repair was successful?

The rear courtesy lamp must operate normally, its connector and wiring must remain secure, and B2022 must not return after the code is cleared and the vehicle is rescanned under the conditions that originally set it.

B2022 — B2022 — Manufacturer Controlled DTC: Causes, Symptoms & Fix

When your scan tool pulls code B2022, you're looking at a body-electrical fault that falls under the manufacturer's own diagnostic framework. This code lives in the B-series family of OBD2 trouble codes, which covers everything outside the powertrain—door locks, window motors, lighting circuits, wiper systems, and similar comfort and convenience features. The vehicle's control module sets B2022 after monitoring those circuits over one or more drive cycles and finding that sensor or switch inputs have drifted outside the factory-calibrated window.

The control module doesn't just store the code. When it detects the fault, it saves a freeze-frame snapshot—engine speed, load, coolant temperature, and vehicle speed recorded at the exact moment the problem occurred. Reviewing that snapshot before diving into diagnostics tells you which conditions triggered the failure, and that often points straight to the root cause without wasting time on unrelated systems.

Common Symptoms of B2022

A warning light or message appears on the instrument cluster
The engine, transmission, and drivetrain continue to operate normally in most cases
One or more body functions work intermittently or stop responding entirely, depending on which circuit triggered the code
In some cases, no obvious symptom is felt beyond the stored code itself

What Causes B2022?

Most of the time, the problem is simpler than it looks. Here are the typical culprits, ordered from most to least frequent:

Corrosion or loose pins at electrical connectors feeding the affected circuit
Wiring damage at flex points—door jambs, tailgate hinges, and similar spots where wires bend repeatedly
Body control module (BCM) internal failure or software glitch
A faulty switch, motor, or actuator within the affected system (lock motor, window regulator, wiper motor, lamp assembly)
A blown fuse or failed relay feeding the circuit

How to Diagnose B2022

Hook up your OBD2 scanner and confirm B2022 is present. Save the freeze-frame data before clearing anything—this record shows what the engine was doing when the fault was logged.
Check for other stored codes. Related P-codes or additional B-codes often point to the specific circuit that's actually failed.
Pull up any technical service bulletins (TSBs) for your make and model. Manufacturers occasionally release software updates or known-fix documentation for B-series faults. Search by VIN on the manufacturer website or nhtsa.gov.
Visually inspect the wiring harness and connectors tied to the body system in question. Look for frayed insulation, green corrosion on terminals, or connectors that are simply unplugged.
Operate the affected component (lock the doors, roll a window up and down, turn the wipers on) while monitoring its switch and motor PIDs in the live data screen. The numbers tell you whether the command is reaching the motor and whether the feedback signal is coming back.
Clear the code and complete a full drive cycle, replicating the conditions from the freeze frame as closely as possible. If B2022 returns, the fault is confirmed and you can move to repair.

How to Fix B2022 — Repair Options with Prices

Start with the cheapest and most common fixes before replacing expensive modules:

Wiring repair or connector replacement: $80–$250. In many cases, cleaning corroded pins or soldering a broken wire at a flex point resolves the issue without any parts purchases.
BCM repair or replacement: $300–$900. Full BCM replacement is the nuclear option and includes programming. Confirm the module is actually bad before going this route.
Replace switch, motor, or actuator: $120–$450. Individual component failure (a dead window motor, a failed lock actuator) is usually straightforward to diagnose using live data and manual testing.

How Much Does Fixing B2022 Cost?

Total repair cost hinges entirely on which component failed. For parts and labor at independent shop rates:

Wiring or connector fix: $80–$250
BCM replacement with programming: $300–$900
Individual switch, motor, or actuator replacement: $120–$450

In most cases, you'll spend between $80 and $900 to resolve B2022. The key is an accurate diagnosis before you buy parts—swapping a $700 BCM when the real problem is a $15 corroded connector is an expensive mistake. Most B2022 faults trace back to connectors or wiring, not the module itself.

Can You Drive with B2022?

Short-term, yes—body codes generally don't affect engine operation or transmission function. Most drivers report no drivability change at all. That said, don't ignore it indefinitely. If the code involves exterior lighting, your ability to see and be seen is compromised. Wiper motor failure creates a safety hazard in rain or snow. Central locking faults can leave the vehicle unsecured. Get the code diagnosed and repaired before it becomes a visibility or security problem.