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Code P288B

Quick reference

P288B at a glance

Plain-language meaning
This code means there's a problem with the part of the car that locks the gears when you park. It's like a safety lock that keeps your car from rolling away when it's parked.
Urgency
High – This issue can lead to vehicle rollaway, posing a safety risk.
Difficulty
Moderate
System
Transmission Performance
Tools mentioned
OBD-II scan tool, Multimeter, Basic hand tools

This summary uses the existing diagnostic information shown in full below.

Laymans terms

This code means there's a problem with the part of the car that locks the gears when you park. It's like a safety lock that keeps your car from rolling away when it's parked.

Explanation

The P288B code is triggered when the Powertrain Control Module (PCM) detects a performance issue in the park lock/pawl actuator circuit.

Technical description

The park lock/pawl actuator is responsible for ensuring that the vehicle remains stationary when placed in park. The PCM monitors the actuator's circuit for proper performance. If the circuit does not meet the expected parameters, the P288B code is set.

Symptoms

• Vehicle rolls when in park

• Check engine light is on

• Difficulty shifting into or out of park

Common Causes

• Faulty park lock/pawl actuator

• Damaged wiring or connectors

• Faulty transmission control module

Glossary

PCM: Powertrain Control Module, the computer that controls engine and transmission functions.

Actuator: A component that moves or controls a mechanism or system.

Diagnosis steps

• Perform a visual inspection of the actuator and wiring.

• Use a scan tool to check for other related codes.

• Test the actuator circuit for proper voltage and resistance.

Repair procedures

• Replace the faulty park lock/pawl actuator.

• Repair or replace damaged wiring or connectors.

• Reprogram or replace the transmission control module if necessary.

Tools required

• OBD-II scan tool

• Multimeter

• Basic hand tools

Estimated repair cost

$200 - $600

Difficulty level

Moderate

Commonly affected vehicles

• Ford F-150

• Chevrolet Silverado

• Toyota Camry

Preventive measures

• Regularly inspect transmission components.

• Ensure proper maintenance of the vehicle's electrical system.

• Avoid harsh shifting or sudden stops.

Error code type

Transmission Performance

User experience recommendations

• Avoid parking on steep inclines until the issue is resolved.

• Have the vehicle inspected by a professional mechanic.

Warranty information

Check with your manufacturer for warranty coverage on transmission components.

Historical data

This code has been associated with vehicles that have high mileage or have experienced transmission issues in the past.

Urgency level

High – This issue can lead to vehicle rollaway, posing a safety risk.

Testing conditions

• Vehicle in park

• Engine running

Component location

The park lock/pawl actuator is typically located within the transmission assembly.

FAQs

Q: Can I drive with a P288B code?
A: It's not recommended to drive with this code active, as it can lead to the vehicle rolling away when parked.

Q: How do I reset the P288B code?
A: After repairs, use an OBD-II scan tool to clear the code. Ensure the issue is resolved to prevent the code from returning.

Optional diagnostic gear

Tools that may help diagnose P288B

THINKCAR ThinkScan Bidirectional diagnostic tool illustration

High-End · Full-system diagnostics

THINKCAR ThinkScan Bidirectional

A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.

Network faults often require full-system access instead of a generic code reader alone.

View on Amazon
Klein Tools MM325 diagnostic tool illustration

Universal · Digital multimeter

Klein Tools MM325

A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.

Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.

View on Amazon
WORKPRO Wiring Repair Kit diagnostic tool illustration

Universal · Wire connectors and repair kit

WORKPRO Wiring Repair Kit

Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.

Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.

View on Amazon

These are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.

Source: ezOBD2 diagnostic database
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