P0968 — Pressure Control Solenoid "C" Control Circuit/Open

How much does it cost to fix P0968?

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

What is the most common cause of P0968?

The most common causes are: wiring or connector faults in the valve body harness, faulty transmission speed sensor, low or degraded transmission fluid.

Is it safe to drive with P0968?

Drive only if the transmission still shifts predictably, and avoid highway speeds. Driving with slipping or limp mode accelerates internal wear — every kilometre can add to the final repair bill.

What are the symptoms of P0968?

Drivers most often notice: Check Engine or transmission warning light on, no movement in severe cases, slipping between gears, transmission stuck in one gear (limp mode).

How do I diagnose P0968 myself?

Start with a scan: confirm P0968, 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.

Pull up P0968 on your scan tool and you're looking at a powertrain fault that lives somewhere between annoying and serious, depending on how badly your transmission is behaving. The full technical name — "Pressure Control Solenoid 'C' Control Circuit/Open" — tells you exactly where the problem lives: an electrohydraulic control valve that the engine or transmission computer can no longer communicate with reliably. When the expected electrical feedback from that solenoid disappears or falls outside the module's calibrated range, P0968 gets logged.

Automatic transmissions work by using solenoid valves to route pressurized fluid into the right channels at the right time. Each solenoid acts as a controlled valve, opening and closing based on commands from the transmission control module. Solenoid C specifically handles pressure regulation for one or more clutch circuits. If the module sends a command but the electrical circuit fails to respond correctly — an open circuit, a short, abnormal resistance — the module knows the hydraulic system can't be trusted and sets P0968.

One thing worth understanding: the control module doesn't flag this code on a single glitch. It watches for the fault condition to repeat under specific operating parameters before turning on the check engine light. When P0968 is stored, it comes bundled with freeze frame data — engine load, RPM, coolant temperature, and vehicle speed captured at the moment the problem showed up. That snapshot tells you exactly which driving conditions to reproduce when you test the vehicle.

Common Symptoms of P0968

• The check engine or transmission warning light is illuminated on the dashboard
• The vehicle fails to move in one or more gears, either forward or reverse
• Gear slipping — the engine revs without the car speeding up proportionally
• Transmission locked into a single gear, commonly called limp mode
• A shuddering or vibration felt at steady highway speeds
• Harsh shifting, where engagement feels rough or jarring
• Noticeable delay when the transmission should be shifting

What Causes P0968?

The most frequent cause of P0968 is degraded or low transmission fluid. Contaminated fluid doesn't conduct electrical signals properly through the solenoid and can accelerate wear on internal seals. Wiring and connector problems in the valve body harness — corrosion, broken strands, loose terminals — also rank high on the list. Internal mechanical wear affecting clutches, the torque converter, or other transmission components can show up as a solenoid control fault. A failing transmission speed sensor occasionally generates symptoms that cascade into solenoid-related codes as well.

How to Diagnose P0968

Pinpointing the root cause of P0968 requires stepping through the system methodically rather than guessing:

1. Connect your OBD2 scanner and confirm P0968 is stored. Save the freeze frame data before clearing anything — those recorded conditions are your roadmap to recreating the failure.
2. Review all other stored and pending codes. Related trouble codes often point toward the actual source, whether it's a sensor failure, wiring issue, or mechanical problem upstream.
3. Check manufacturer technical service bulletins for your specific make and model. Many P0xxx transmission codes have documented factory fixes, software calibrations, or known issues tied to certain model years.
4. Inspect the wiring harness and connectors at the transmission thoroughly. Look for damaged insulation, corrosion, broken wires hidden under tape, and connectors that aren't fully seated. Wiggle everything while monitoring live data if your scanner supports it.
5. Test the solenoid itself. Using a multimeter, check resistance against manufacturer specifications, and verify that the control circuit shows proper voltage and ground when the engine is running.
6. Clear P0968, complete a full drive cycle — including the exact conditions from the freeze frame — and verify the code does not return. If it comes back, you've confirmed a genuine hardware failure.

Repair Options and Costs

Work from the outside in, addressing cheaper and more common failures before committing to major transmission work:

• Transmission rebuild or replacement: $2,500–$5,500
• Replace a shift solenoid: $300–$800
• Valve body repair or replacement: $700–$1,500
• Transmission fluid service: $150–$350

The total repair bill for P0968 typically falls somewhere between $150 and $5,500, depending on which component is actually at fault. A thorough diagnosis before buying expensive parts is almost always worth the upfront cost. In most cases, the issue turns out to be wiring or the solenoid itself rather than a full transmission failure.

Can You Drive with P0968?

This code carries a caution severity rating. If the transmission still shifts and holds gear without slipping, short-distance driving on lower-speed roads may be acceptable while you arrange a repair. However, continuing to drive with a slipping transmission or one stuck in limp mode accelerates internal wear and can turn a $400 solenoid fix into a $4,000 transmission replacement. Get this diagnosed promptly and avoid sustained highway driving until the issue is resolved.

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