P0762 Shift Solenoid "C" Stuck On

The P0762 trouble code is an OBD-II diagnostic trouble code associated with Shift Solenoid "C" in an automatic transmission.

P0762 – Shift Solenoid "C" Stuck On

This code means that the Transmission Control Module (TCM) has detected that Shift Solenoid "C" is remaining in an ON or active condition when the transmission system expects it to be OFF.

Shift Solenoid "C" controls transmission-fluid flow through a specific hydraulic circuit. Depending on the transmission design, that circuit can affect gear selection, clutch application, brake application, shift timing or hydraulic pressure.

The phrase "Stuck On" does not automatically mean that the solenoid itself is physically stuck. The solenoid may be mechanically stuck, but an electrical problem can also keep it energized.

Possible causes include a shorted control wire, a defective solenoid, contaminated transmission fluid, a sticking valve body, an internal transmission harness problem or, less commonly, a TCM driver fault.

What Does P0762 Mean?

An automatic transmission uses electronically controlled solenoids to direct hydraulic fluid.

The TCM continuously decides when each solenoid should be activated or deactivated.

The basic control process is:

TCM → Electrical Command → Shift Solenoid "C" → Hydraulic Fluid Flow → Gear/Clutch Control

Under normal conditions, the TCM may command the solenoid:

ON → OFF → ON → OFF

With P0762, the system detects that Solenoid "C" remains active when an OFF condition is expected.

In simple terms:

The transmission control system is trying to turn Solenoid "C" off, but the system detects that it is still ON.

The reason can be electrical or mechanical.

What Is Shift Solenoid "C"?

Shift Solenoid "C" is an electrically controlled valve inside the automatic transmission.

When energized, it changes the hydraulic flow through a particular circuit.

Depending on the transmission, Solenoid "C" can be involved in:

• Gear changes

• Clutch application

• Brake application

• Shift timing

• Hydraulic pressure control

• Specific gear combinations

The exact function of Solenoid "C" varies by transmission.

It is therefore incorrect to say that Solenoid "C" always controls a particular gear across all vehicles.

The manufacturer-specific transmission hydraulic diagram should be used to determine exactly what this solenoid controls.

What Does "Stuck On" Actually Mean?

There are two major possibilities.

Electrical stuck-on condition

The solenoid is being electrically energized even when the TCM wants it OFF.

This can happen because of:

• Short to power

• Damaged wiring

• Failed TCM driver

• Internal electrical fault

Mechanical stuck-on condition

The electrical command may be correct, but the solenoid or associated hydraulic valve remains physically open or active.

This can happen because of:

• Contaminated fluid

• Debris

• Varnish

• Solenoid wear

• Valve-body wear

• Mechanical sticking

This distinction is extremely important when diagnosing P0762.

Symptoms of P0762

The symptoms depend on which transmission function is controlled by Solenoid "C".

Possible symptoms include:

• Check Engine Light

• Transmission warning light

• Harsh shifting

• Delayed shifting

• Erratic gear changes

• Unexpected downshifting

• Transmission slipping

• Shift flare

• Missing gear

• Transmission stuck in one gear

• Delayed Drive engagement

• Delayed Reverse engagement

• Limp mode

• Reduced acceleration

• Poor fuel economy

• Increased transmission temperature

Some vehicles may continue to drive relatively normally despite storing P0762.

Others may immediately enter a fail-safe mode.

What Does P0762 Feel Like While Driving?

Harsh shifting

If Solenoid "C" remains active at the wrong time, hydraulic pressure can be applied incorrectly during a shift.

Unexpected gear selection

The transmission may select a gear combination that does not correspond with the driver's input.

Delayed shifting

The transmission may hesitate before completing a gear change.

Transmission slipping

If the affected hydraulic circuit controls clutch pressure, incorrect operation can result in clutch slip.

Engine RPM flare

During a shift, engine speed may increase unexpectedly if clutch engagement is incorrect.

Limp mode

The TCM may restrict gear operation to protect the transmission.

Common Causes of P0762

Faulty Shift Solenoid "C"

The solenoid may have an internal electrical or mechanical failure.

Solenoid mechanically stuck

Debris or contaminated fluid can prevent the solenoid plunger from returning to the correct position.

Shorted solenoid control wire

A short to power can continuously energize the solenoid.

Damaged transmission wiring

Heat, vibration or physical damage can create electrical faults.

Corroded connector

Corrosion can alter the electrical characteristics of the circuit.

Loose terminal

Poor terminal contact can produce abnormal electrical behavior.

Internal transmission harness fault

The internal harness can develop shorts or other electrical failures.

Contaminated transmission fluid

Metal particles, clutch material and sludge can interfere with solenoid operation.

Valve-body problem

A related hydraulic valve can become stuck or worn.

Blocked hydraulic passage

Debris can prevent normal fluid movement.

Incorrect transmission fluid

Incorrect fluid characteristics can affect hydraulic and solenoid operation.

TCM driver failure

The TCM may incorrectly continue supplying the solenoid with the control signal.

Is P0762 Serious?

P0762 can be serious.

A solenoid that remains active at the wrong time can cause incorrect hydraulic operation.

If the affected circuit controls a clutch or brake element, continued operation can result in:

• Clutch wear

• Transmission overheating

• Abnormal shifting

• Increased hydraulic stress

• Additional transmission faults

However, P0762 does not automatically mean the transmission needs to be rebuilt or replaced.

A wiring short or defective solenoid can produce the same code.

Can You Drive With P0762?

If the vehicle is shifting normally and there are no severe symptoms, a short drive to a repair facility may be possible.

However, continued driving should be avoided if the transmission is:

• Slipping badly

• Shifting violently

• Losing gears

• Overheating

• Stuck in limp mode

• Failing to engage Drive or Reverse

A transmission that is slipping can generate substantial heat and clutch wear.

P0762 vs. P0763

These codes both concern Shift Solenoid "C", but they describe different conditions.

P0762 – Shift Solenoid "C" Stuck On

The system detects that the solenoid remains active.

P0763 – Shift Solenoid "C" Electrical

The system detects an electrical malfunction in the solenoid circuit.

A shorted circuit can potentially cause P0762 because it can keep the solenoid energized.

P0762 vs. P0761

P0761 – Shift Solenoid "C" Performance / Stuck Off

The solenoid is not behaving correctly or is detected as stuck OFF.

P0762 – Shift Solenoid "C" Stuck On

The solenoid is detected as remaining active.

These codes point toward opposite solenoid states.

P0762 vs. P0764

P0764 – Shift Solenoid "C" Intermittent

The problem comes and goes.

P0762 – Shift Solenoid "C" Stuck On

The system detects a persistent ON condition.

An intermittent problem can eventually become a permanent stuck-on or electrical condition.

P0762 vs. P0760

P0760 – Shift Solenoid "C" Malfunction

A general malfunction involving Solenoid "C".

P0762 – Shift Solenoid "C" Stuck On

The detected problem is specifically an ON condition.

Where Is Shift Solenoid "C"?

Its physical location varies by transmission.

It may be:

• Inside the transmission

• Mounted in the valve body

• Under the transmission pan

• Part of a solenoid pack

• Integrated into a mechatronic assembly

Some transmissions allow individual solenoid replacement.

Other transmissions require removal of the valve body or solenoid assembly.

How to Diagnose P0762

The most important diagnostic question is:

Is Solenoid "C" actually stuck mechanically, or is an electrical problem keeping it ON?

A proper diagnosis should answer this question before parts are replaced.

1. Scan the TCM

Retrieve all transmission-related codes using a professional diagnostic scanner.

Check:

• Stored codes

• Pending codes

• Freeze-frame data

• Transmission temperature

• Commanded gear

• Actual gear

• Solenoid commands

• Input speed

• Output speed

Additional codes can provide important clues.

2. Check freeze-frame data

Determine when P0762 was recorded.

Look at:

• Vehicle speed

• Engine RPM

• Transmission temperature

• Throttle position

• Engine load

• Selected gear

• Battery voltage

This can help determine which operating condition triggered the fault.

3. Determine the TCM command

Use the scan tool to determine whether the TCM is commanding Solenoid "C" ON or OFF.

This is one of the most important steps.

If the TCM commands OFF but the solenoid remains electrically energized, an electrical problem becomes highly likely.

If the TCM command itself remains ON when it should be OFF, the control strategy and TCM should be investigated.

4. Inspect the transmission connector

Check for:

• Corrosion

• Bent pins

• Loose terminals

• Water intrusion

• Fluid contamination

• Damaged connector housing

5. Inspect the wiring

Look for:

• Chafing

• Broken insulation

• Melted wiring

• Pinched wires

• Short circuits

• Poor previous repairs

Pay particular attention to areas exposed to heat and vibration.

6. Check for a short to power

A shorted control wire can keep the solenoid energized.

The exact test depends on whether the transmission uses a high-side or low-side control strategy.

The manufacturer's wiring diagram should be used.

7. Check circuit resistance

Measure the resistance of the Solenoid "C" circuit according to the manufacturer's procedure.

An abnormal value can indicate:

• Open circuit

• Short circuit

• Excessive resistance

• Internal solenoid failure

8. Measure Solenoid "C" resistance

Compare the solenoid resistance with the manufacturer's specification.

A solenoid with an open coil or abnormal resistance may need replacement.

But normal resistance does not prove that the solenoid is mechanically free.

9. Check the electrical control signal

An oscilloscope can be useful for systems using PWM control.

It can help determine whether the control signal is present continuously when it should be switching.

10. Inspect the internal transmission harness

If the external wiring is good, inspect the internal transmission harness where applicable.

A short inside the transmission can keep the solenoid energized.

11. Check transmission fluid

Inspect:

• Fluid level

• Fluid specification

• Fluid color

• Burnt smell

• Metal particles

• Clutch debris

Severe contamination can cause solenoid and valve-body problems.

12. Test the solenoid mechanically

If the electrical circuit is correct, determine whether the solenoid itself is physically sticking.

A solenoid can have correct electrical resistance but remain mechanically stuck.

13. Inspect the valve body

If the solenoid works correctly but the hydraulic circuit remains active, inspect the valve body.

Possible issues include:

• Sticking valves

• Worn valve bores

• Debris

• Restricted passages

• Hydraulic leakage

14. Perform hydraulic pressure testing

If necessary, measure the pressure in the affected circuit according to the manufacturer's procedure.

Incorrect pressure can help distinguish between an electrical solenoid problem and a hydraulic problem.

15. Evaluate the TCM

If the wiring, solenoid and hydraulic components are verified to be functioning correctly, the TCM may need to be evaluated.

A failed TCM driver can continuously energize the solenoid.

Can a Bad Solenoid Cause P0762?

Yes.

The solenoid may be physically stuck in an active position or have an internal electrical failure.

Can Wiring Cause P0762?

Yes.

A shorted control wire can keep the solenoid energized even when the TCM commands it OFF.

This is one of the most important things to check before replacing the solenoid.

Can a Bad Connector Cause P0762?

Yes, although the exact effect depends on the circuit design.

A damaged connector can create abnormal electrical conditions that affect solenoid control.

Can Dirty Transmission Fluid Cause P0762?

Yes.

Contamination can cause the solenoid plunger or related valve to stick.

Can Low Transmission Fluid Cause P0762?

Low fluid can cause hydraulic and shifting problems, but it is not normally the direct cause of a solenoid being electrically stuck ON.

The fluid level should nevertheless be checked.

Can a Bad Valve Body Cause P0762?

Yes.

A valve associated with the Solenoid "C" circuit may remain in an incorrect position because of contamination or wear.

Can a Bad TCM Cause P0762?

Yes.

If the TCM's output driver fails and continuously energizes Solenoid "C", the system can detect a stuck-on condition.

However, the TCM should not be replaced until the wiring and solenoid have been tested.

Can P0762 Cause Harsh Shifting?

Yes.

Incorrect solenoid operation can change hydraulic pressure at the wrong time.

Can P0762 Cause Transmission Slipping?

Yes, depending on the transmission.

If Solenoid "C" controls a clutch circuit, incorrect hydraulic pressure can cause clutch slip.

Can P0762 Cause Limp Mode?

Yes.

The TCM may disable certain transmission functions to protect the transmission.

Can P0762 Cause Transmission Overheating?

It can.

If the fault causes clutch slip or repeated abnormal engagement, heat generation can increase.

Can P0762 Damage the Transmission?

It can if the vehicle continues to be driven with severe symptoms.

Repeated incorrect clutch or brake application can increase wear and temperature.

Common Diagnostic Mistakes With P0762

Replacing the solenoid immediately

The control wire may be shorted to power.

Assuming "stuck on" means mechanical sticking

The solenoid may be electrically energized by a wiring fault.

Testing only resistance

Resistance does not show whether the solenoid is mechanically moving.

Ignoring the TCM command

You need to know whether the TCM is actually requesting the solenoid to be ON.

Ignoring the valve body

A hydraulic valve can remain active even when the electrical system is functioning normally.

Ignoring transmission-fluid contamination

Debris can cause both solenoid and valve-body problems.

Replacing the TCM too early

A TCM should not be condemned before the complete circuit has been tested.

What Is the Correct Repair for P0762?

The correct repair depends on the actual cause.

Possible repairs include:

• Replacing Shift Solenoid "C"

• Repairing a shorted control wire

• Repairing damaged wiring

• Replacing damaged connector terminals

• Cleaning connector corrosion

• Repairing water intrusion

• Repairing the internal transmission harness

• Correcting transmission-fluid level

• Using the correct transmission fluid

• Servicing the valve body

• Cleaning contaminated hydraulic passages

• Repairing hydraulic-pressure problems

• Updating TCM software where applicable

• Reprogramming the TCM

• Replacing the TCM if its driver circuit is confirmed defective

How to Test the Vehicle After Repair

After the repair, the vehicle should be tested under different conditions.

Verify that:

• Solenoid "C" responds correctly

• The solenoid turns OFF when commanded

• Electrical signals are within specification

• No short to power remains

• Wiring remains stable

• Connectors are secure

• Transmission fluid is at the correct level

• Gear changes are smooth

• No slipping occurs

• No unexpected gear changes occur

• Transmission temperature remains normal

• Limp mode does not activate

• No additional codes appear

• P0762 does not return

The road test should include different gears, speeds, throttle positions and transmission temperatures.

Frequently Asked Questions About P0762

What does P0762 mean?

P0762 means the transmission control system has detected that Shift Solenoid "C" is stuck ON or remaining active when it should be OFF.

Does P0762 mean Shift Solenoid "C" is bad?

Not necessarily. A shorted wire, connector problem, valve-body fault or TCM problem can also cause the code.

Can a shorted wire cause P0762?

Yes. A short to power can continuously energize the solenoid.

Can dirty transmission fluid cause P0762?

Yes. Contaminated fluid can cause the solenoid or related valve to stick.

Can low transmission fluid cause P0762?

It can cause shifting and hydraulic problems, but it is not normally the direct cause of an electrically stuck-on solenoid.

Can a bad valve body cause P0762?

Yes.

Can a bad TCM cause P0762?

Yes, although the wiring and solenoid should be checked first.

Can P0762 cause harsh shifting?

Yes.

Can P0762 cause transmission slipping?

Yes, depending on the hydraulic circuit controlled by Solenoid "C".

Can P0762 cause limp mode?

Yes.

Can P0762 cause transmission overheating?

It can, particularly if clutch slip occurs.

Can I drive with P0762?

If the vehicle is shifting normally, a short trip to a repair facility may be possible. If it is slipping, shifting violently, overheating or losing gears, continued driving should be avoided.

Does P0762 mean the transmission needs to be replaced?

No. The fault may be limited to the solenoid, wiring, connector or valve body.

Final Thoughts on P0762

P0762 – Shift Solenoid "C" Stuck On indicates that the transmission control system has detected that Solenoid "C" remains active when it should be OFF.

The most important diagnostic question is whether the solenoid is mechanically stuck or whether an electrical fault is keeping it energized.

A reliable diagnostic sequence is:

Scan Data → TCM Command → Wiring → Short-to-Power Test → Connector → Solenoid → Internal Harness → Transmission Fluid → Valve Body → Hydraulic Pressure → TCM

If the TCM commands the solenoid OFF but electrical power continues to reach it, the wiring or TCM driver becomes a major suspect.

If the electrical command is correct but the hydraulic circuit remains active, the solenoid itself or the valve body should be investigated.

Therefore, P0762 should not automatically lead to a transmission replacement. A systematic electrical and hydraulic diagnosis can often identify a much more specific and repairable cause.