B1822 – OBD-II DTC

OBD-II DTC B1822 – Wiper Rear Park Sense Input Circuit Failure

DTC B1822 meaning

DTC B1822 refers to a fault in the rear wiper park sense input circuit. This diagnostic trouble code indicates that the vehicle’s onboard diagnostic system has detected an issue with the signal from the rear wiper motor or its associated components. The rear wiper park sense input is responsible for determining whether the rear wiper is in the parked position or not, which is crucial for proper operation.

DTC B1822 symptoms

Common symptoms associated with DTC B1822 may include:

• Rear wiper not functioning properly
• Rear wiper not returning to the park position
• Intermittent operation of the rear wiper
• Dashboard warning lights related to the wiper system

DTC B1822 causes

Several factors can lead to the occurrence of DTC B1822, including:

• Faulty rear wiper motor
• Damaged or corroded wiring in the rear wiper circuit
• Defective wiper park switch
• Issues with the body control module (BCM)
• Poor electrical connections

DTC B1822 seriousness

The seriousness of DTC B1822 can vary depending on the specific symptoms and the vehicle’s usage. While it may not pose an immediate safety risk, it can lead to reduced visibility in adverse weather conditions if the rear wiper is not functioning correctly. It is advisable to address this issue promptly to ensure proper vehicle operation.

How to diagnose DTC B1822

To diagnose DTC B1822, follow these steps:

1. Use an OBD-II scanner to confirm the presence of DTC B1822.
2. Inspect the rear wiper motor and its wiring for any visible damage or corrosion.
3. Check the wiper park switch for proper operation.
4. Test the electrical connections for continuity and proper voltage.
5. Examine the body control module for any faults or issues.
6. Clear the DTC and perform a functional test of the rear wiper system.

How to fix DTC B1822 step-by-step instructions

To fix DTC B1822, follow these step-by-step instructions:

1. Disconnect the vehicle’s battery to ensure safety while working on electrical components.
2. Inspect and repair any damaged wiring or connectors in the rear wiper circuit.
3. Replace the rear wiper motor if it is found to be faulty.
4. Test and replace the wiper park switch if necessary.
5. Reconnect the battery and clear the DTC using an OBD-II scanner.
6. Test the rear wiper system to ensure it operates correctly and returns to the park position.

How to erase DTC B1822

To erase DTC B1822, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the vehicle’s ignition without starting the engine.
3. Navigate to the DTC menu on the scanner and select the option to clear or erase codes.
4. Confirm the action and wait for the scanner to complete the process.
5. Disconnect the scanner and perform a test drive to ensure the code does not reappear.

Recommended tools for OBD-II diagnostics

Explore our expert picks: The Best OBD2 Scanners for 2025

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.