P092A — Gear Shift Lock Solenoid/Actuator Control Circuit "B"/Open

What does OBD2 code P092A mean?

OBD2 code P092A flags a problem with the automatic transmission control (gear shift lock solenoid/actuator control circuit "b"/open). Short, gentle driving to a shop is usually possible. Common culprits: internal mechanical wear (clutches, torque converter), low or degraded transmission fluid, valve body wear.

What is the most common cause of P092A?

The most common causes are: internal mechanical wear (clutches, torque converter), low or degraded transmission fluid, valve body wear.

Will P092A clear itself?

Sometimes P092A clears after a few drive cycles if the fault was intermittent — for example a loose connector or a tank of bad fuel. The underlying cause usually remains, so the code tends to return. Clear it once; if it comes back, diagnose rather than erase it repeatedly.

How do I diagnose P092A myself?

Start with a scan: confirm P092A, save the freeze frame and note any companion codes. Then inspect the wiring and connectors related to the automatic transmission control, and verify the suspect component against live data before buying parts.

How much does it cost to fix P092A?

Transmission fluid service — $150–$350; Valve body repair or replacement — $700–$1,500; Transmission rebuild or replacement — $2,500–$5,500; Replace a shift solenoid — $300–$800. Exact cost depends on the root cause, your vehicle and local labor rates — a proper diagnosis is the cheapest first step.

When your check engine light comes on and a mechanic connects a scanner, you might see code P092A. This five-character code tells you something is wrong with the automatic transmission's shift lock mechanism. More specifically, the powertrain control module has detected an open circuit or abnormal signal in the "B" side of the gear shift lock solenoid or actuator control system.

Modern automatics rely on electronically controlled solenoids to manage gear engagement and shift quality. The control module commands these solenoids to direct hydraulic fluid at precise moments. When it sends a signal to the shift lock solenoid circuit "B" but receives no confirmation back — or detects an impossible electrical condition — it logs P092A. The module typically needs to see this fault repeat across multiple drive cycles before it flags the code permanently. When that happens, it also saves a freeze frame: a snapshot of engine rpm, load, coolant temperature and vehicle speed captured at the exact moment the problem occurred. That snapshot is often the best starting point for diagnosis.

Symptoms of P092A

Expect one or more of the following when P092A is active:

• Gear slipping or unexpected shifts
• Check Engine or transmission warning light illuminated on the dashboard
• Transmission locked in a single gear (limp mode)
• Shuddering or vibration at highway speeds
• Harsh or noticeably delayed gear engagement
• General loss of power or poor acceleration

What causes P092A?

The most frequent culprit is degraded or low transmission fluid — insufficient hydraulic pressure prevents the solenoid from operating correctly. Beyond that, the following issues commonly trigger P092A:

• Failed shift or pressure control solenoid
• Faulty transmission speed sensor sending incorrect data to the control module
• Valve body wear affecting the electrical or hydraulic circuit
• Damaged wiring or poor electrical connections in the transmission control circuit
• Rare: faulty transmission control module itself

How to diagnose P092A

A systematic approach keeps you from replacing good parts:

1. Connect an OBD2 scanner and confirm P092A is stored. Save the freeze frame data immediately — it shows engine conditions when the fault was detected and guides the rest of the process.
2. Pull all related codes. Secondary codes often reveal the actual root cause rather than the symptom. Check manufacturer technical service bulletins (TSB) for your vehicle — some P0xxx codes have documented factory fixes or software updates available by searching your VIN on the manufacturer site or nhtsa.gov.
3. Perform a visual inspection of the wiring harness and connectors feeding the automatic transmission control. Look for damaged insulation, corrosion, chafing from heat shields or body mounts, and loose or unplugged connectors.
4. Check transmission fluid level and condition. Dark, burnt-smelling fluid points toward internal wear and may be the root cause of the electrical fault.
5. Use a capable scanner to read transmission-specific codes and live data. Solenoid states and input/output speed readings help identify which circuit is actually failing.
6. Clear the code, complete a full drive cycle including the conditions from the freeze frame, and verify P092A does not return. If it comes back, you have narrowed the problem to a confirmed component fault.

Repair options and costs

Start with the cheapest and most common solutions before committing to major work:

• Transmission fluid service (drain, filter, refill): $150–$350
• Shift solenoid replacement: $300–$800
• Valve body repair or replacement: $700–$1,500
• Transmission rebuild or full replacement: $2,500–$5,500

All prices reflect parts and labor at independent shop rates. In most cases, fixing P092A costs between $150 and $5,500 depending on what component actually failed. Getting an accurate diagnosis before buying parts is the single best way to avoid overspending — the most expensive scenario is rarely the first one to check.

Can you drive with P092A?

Use caution. If the transmission still shifts predictably and no warning lights are flashing, short trips at lower speeds may be acceptable until you can schedule a diagnosis. Avoid highway speeds and aggressive driving. Once the transmission enters limp mode — stuck in one gear — stop driving immediately. Every kilometre with slipping gears or in limp mode adds wear to internal components and increases the final repair bill.

Related OBD2 codes

• P0900: Clutch Actuator Circuit/Open
• P0901: Clutch Actuator Circuit Range/Performance
• P0902: Clutch Actuator Circuit Low
• P0903: Clutch Actuator Circuit High
• P0904: Gate Select Position Circuit
• P0905: Gate Select Position Circuit Range/Performance