B1619 — Wiper Rear Low Limit Input Circuit Failure

body electrical

Is it safe to drive?

Short-term driving is OK Usually safe to drive — body codes rarely affect drivability. Exceptions: exterior lighting and wipers in bad weather, and central locking faults that can leave the car unsecured.

How to diagnose with an OBD scanner

Read the code and freeze frame Connect an OBD2 scanner, confirm B1619 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
Check for companion codes and TSBs Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many B0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
Inspect wiring and connectors Visually inspect the wiring harness and connectors related to the body electrical system for damage, corrosion, chafing or poor contact.
Subsystem check Operate the affected function while watching its switch and motor PIDs in live data.
Subsystem check Inspect connectors and wiring at flex points (door jambs, tailgate hinges) — wires break there first.
Verify the repair Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm B1619 does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for B1619 (parts and labor, USD, independent shop rates): BCM repair or replacement: $300–$900; Repair wiring or connectors: $80–$250; Replace the switch or actuator: $120–$450. Overall, fixing B1619 usually costs between $80 and $900. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Common questions

What are the symptoms of B1619?

Drivers most often notice: no impact on engine operation in most cases, warning light on the dashboard, the affected function (locks, windows, lighting, wipers) works intermittently or not at all.

What does OBD2 code B1619 mean?

Wiper Rear Low Limit Input Circuit Failure (B1619): a body electrical fault affecting the body electrical system. The car is usually drivable while you plan the repair. Most often caused by faulty switch, motor or actuator of the affected system, blown fuse or failed relay, damaged wiring in door jambs or wet areas.

How do I diagnose B1619 myself?

Start with a scan: confirm B1619, save the freeze frame and note any companion codes. Then inspect the wiring and connectors related to the wiper rear low limit input circuit, and verify the suspect component against live data before buying parts.

What is the most common cause of B1619?

The most common causes are: faulty switch, motor or actuator of the affected system, blown fuse or failed relay, damaged wiring in door jambs or wet areas.

Is it safe to drive with B1619?

Usually safe to drive — body codes rarely affect drivability. Exceptions: exterior lighting and wipers in bad weather, and central locking faults that can leave the car unsecured.

When your vehicle's computer logs trouble code B1619, it's flagging a problem within the body electrical system — specifically, the rear wiper low-limit input circuit has failed to operate as expected. This code tells you the control module detected a signal irregularity when checking the rear wiper motor's position feedback. Unlike drivetrain codes that affect how your engine runs, B1619 deals with comfort and convenience features, though certain failures can create safety concerns depending on conditions.

The body control module (BCM) constantly monitors switches, motors, and actuators throughout your vehicle's interior and exterior systems. For the rear wiper assembly, this means tracking whether the motor reaches its fully retracted or "parked" position after each wiping cycle. When the signal indicating this low-limit position fails to arrive — or arrives at the wrong time — the module logs B1619 and illuminates the check-engine light. The code typically requires the fault to appear more than once under similar operating conditions before the light activates, which is why clearing it and immediately driving under the same circumstances often brings it right back.

Freeze frame data stored alongside B1619 proves invaluable during diagnosis. This snapshot records engine load, RPM, coolant temperature, and vehicle speed at the exact moment the fault occurred. Replicating those specific conditions during your testing helps confirm whether the issue is still present or was a one-time electrical glitch from moisture, a brief voltage spike, or a loose connection that corrected itself.

Typical Symptoms of B1619

Dashboard warning light remains solid or flashes depending on vehicle make
Rear wiper fails to operate entirely or stops mid-cycle
Rear wiper parks in an incorrect position after use
Intermittent operation that comes and goes with temperature or humidity changes
Other body functions may exhibit related glitches if a shared connector or ground is involved
No change to engine performance, fuel economy, or transmission behavior

What Triggers Code B1619

The most frequent culprit behind B1619 is wiring damage in areas exposed to movement and the elements. Door jambs, tailgate hinges, and trunk edges experience constant flexing, and the wires running through these zones eventually crack or separate. Moisture intrusion compounds the problem by corroding connector pins and creating intermittent shorts. Beyond wiring issues, the rear wiper motor itself can fail to provide the position signal the module expects. In some cases, the switch that commands the wiper operation malfunctions, sending incorrect data downstream. Less commonly, the body control module develops internal faults that prevent proper interpretation of input signals.

Diagnosing B1619 Effectively

Pinpointing the exact cause of B1619 requires methodical testing rather than part-swapping:

Connect an OBD2 scanner, retrieve code B1619, and record all freeze frame data before clearing anything. Note the conditions recorded — these guide your verification testing later.
Pull all additional codes stored in the system. Related body codes often point toward the underlying problem, such as grounds shared between circuits or power supplies feeding multiple components.
Check manufacturer technical service bulletins using your vehicle identification number. Some B1619 issues stem from known defects with factory-issued software updates or service campaigns.
Visually trace the rear wiper circuit wiring, giving special attention to flex points at door Jambs and hinge areas where wires break most readily. Inspect connectors for bent pins, corrosion buildup, or water entry.
Monitor live data from the rear wiper motor position sensor while actuating the system. The PID should show a clear transition from active wiping to parked position within normal timeframes.
Clear B1619 after your inspection, then drive the vehicle through conditions matching the freeze frame data. If the code returns, the problem remains active and requires repair before it clears permanently.

Repair Options and What to Expect

The cost to resolve B1619 varies significantly depending on which component actually failed. Addressing the most probable causes first keeps your spending reasonable.

Component	Parts Cost	Labor Cost	Total Range
BCM repair or replacement	$200–$500	$100–$400	$300–$900
Wiring or connector repair	$20–$80	$60–$170	$80–$250
Switch or actuator replacement	$50–$200	$70–$250	$120–$450

Overall, fixing B1619 typically falls between $80 and $900 depending on the diagnosis. Spending time confirming the root cause before purchasing parts almost always saves money — the priciest scenario is rarely where you should start.

Can You Drive With B1619 Set?

This particular code carries a short-term severity rating, meaning most drivers can continue using their vehicle while addressing it. Body electrical faults generally do not impair engine operation, transmission shifting, or braking systems. However, functional limitations apply in specific situations: a non-operational rear wiper creates visibility hazards during rain or snow, faulty exterior lighting reduces your visibility to other drivers, and central locking problems can leave your vehicle unsecured. Address B1619 promptly to restore full functionality, particularly if you frequently drive in adverse weather or rely on remote locking for security.