Faulty governor pressure solenoid, which is the most common cause on Chrysler 45RFE/545RFE units; Contaminated or degraded transmission fluid causing solenoid sticking or pressure irregularities; Worn or damaged governor pressure sensor giving inaccurate readings; Internal transmission hydraulic leak or worn valve body components affecting governor pressure; Damaged wiring or corroded connectors between the TCM and the governor pressure solenoid or sensor; Restricted transmission filter or low fluid level causing pressure control issues; Failed TCM or valve body assembly, though less common than solenoid or fluid issues

DTC codes / Chrysler codes / P1756

P1756 · ChryslerGovernor Pressure Not Equal To Target At 15-20 PSI

Q: What does code P1756 mean?

Governor Pressure Not Equal To Target At 15-20 PSI. P1756 on Chrysler vehicles means the transmission control module (TCM) commanded the governor pressure solenoid to a target pressure between 15 and 20 PSI, but the governor pressure sensor reported a pressure that did not match that target within the allowed tolerance. The TCM sets this code when the actual governor pressure deviates from the commanded value during that specific low-pressure test window, indicating a hydraulic or electrical fault in the governor pressure control circuit.

P1756 on Chrysler vehicles means the transmission control module (TCM) commanded the governor pressure solenoid to a target pressure between 15 and 20 PSI, but the governor pressure sensor reported a pressure that did not match that target within the allowed tolerance. The TCM sets this code when the actual governor pressure deviates from the commanded value during that specific low-pressure test window, indicating a hydraulic or electrical fault in the governor pressure control circuit.

SystemPowertrain

Code typeChrysler specific

SeverityMedium

Fix difficultyProfessional

AreaTransmission

Symptoms you may notice

Illuminated check engine light or transmission warning light, often with no other symptoms
Harsh or delayed shifts, especially when the transmission is cold
Transmission may enter limp mode and stay in a single gear
Erratic shift points or shuddering during acceleration
Poor fuel economy due to improper shift scheduling
In some cases, no drivability symptoms besides the warning light

Common causes, most likely first

Faulty governor pressure solenoid, which is the most common cause on Chrysler 45RFE/545RFE units
Contaminated or degraded transmission fluid causing solenoid sticking or pressure irregularities
Worn or damaged governor pressure sensor giving inaccurate readings
Internal transmission hydraulic leak or worn valve body components affecting governor pressure
Damaged wiring or corroded connectors between the TCM and the governor pressure solenoid or sensor
Restricted transmission filter or low fluid level causing pressure control issues
Failed TCM or valve body assembly, though less common than solenoid or fluid issues

How to diagnose and fix it

Check transmission fluid level and condition; top off or replace fluid and filter if contaminated or low
Inspect the governor pressure solenoid and sensor connectors for corrosion, loose pins, or damaged wiring
Use a scan tool to command governor pressure and compare the sensor reading to the target to verify the fault
Test the governor pressure solenoid resistance and compare to factory specifications; replace if out of range
Remove the valve body and inspect the governor pressure solenoid and sensor for debris or wear; clean or replace as needed
Perform a transmission adaptive relearn procedure after any repair to reset shift adaptives
If the fault persists after electrical and hydraulic checks, diagnose the TCM and internal transmission components

Governor pressure faults often misdiagnosed

A low fluid level or a clogged transmission filter can cause this code without any faulty solenoid, so always verify fluid condition and level before replacing parts.
The governor pressure solenoid on Chrysler 45RFE and 545RFE transmissions is a common failure point, but the sensor can also drift and set P1756 even when the solenoid is working correctly.
This code can be set by a momentary glitch in the governor pressure circuit, so check for stored pending codes and freeze-frame data before condemning a component.
Wiring harness chafing near the transmission bell housing or valve body connector is a frequent hidden cause that visual inspection often misses.
After replacing the governor pressure solenoid or sensor, the TCM must relearn the governor pressure curve; skipping the relearn can cause the code to return immediately.

Can I keep driving with P1756?

You can usually drive the vehicle short distances to a repair shop, but avoid heavy acceleration, towing, or long trips because the transmission may enter limp mode and cause unsafe shifting. If the transmission slips or refuses to shift, stop driving and have it towed to prevent further damage.

Tools that help

Tools we recommend are in the Auto Veteran shop on Amazon. As an Amazon Associate we earn from qualifying purchases.

Guidance is general and written for Chrysler vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.