P1757

Code

CHRYSLER P — Powertrain

Governor Pressure Above 3 PSI When Request Is 0 PSI

Brand: CHRYSLER

Type: P — Powertrain

Views: UK: 20 EN: 31 RU: 26

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Internal transmission hydraulic leakage or spring failure (stuck/open valve)
Blocked or contaminated valve body or governor passages
Faulty governor pressure sensor/switch or incorrect sensor signal
Pressure control solenoid stuck, leaking, or mechanically jammed
Wiring harness or connector fault (open, short, corrosion) between sensor/solenoid and TCM
Low, degraded, or incorrect transmission fluid

Symptoms

Check Engine/Transmission warning lamp illuminated
Transmission may shift harshly, slip, or go into limp mode
Erratic or delayed upshifts and downshifts
Incorrect gear selection or inability to shift into all gears
Possible transmission noise or fluid leaks
Reduced drivability and performance

What to check

Read and record freeze frame and all transmission-related codes with a scan tool
Monitor live data PIDs: governor pressure, requested pressure, pressure control solenoid duty cycles, and gear/shift status
Visually inspect transmission fluid level and condition (color, smell, contamination)
Inspect wiring and connectors at governor pressure sensor/switch, pressure control solenoids, and TCM for damage or corrosion
Check for TSBs or software updates for the vehicle/TCM

Signal parameters

Governor pressure PID should read approximately 0 psi (near zero) when TCM requested pressure = 0 psi; code trips when measured > ~3 psi
Pressure sensor output is typically an analog voltage proportional to pressure (0–5 V scale) — sensor voltage should be at the low end when request = 0
TCM requested pressure PID should report 0 psi (or 0%) when idle/neutral condition expected
Pressure control solenoid duty cycle should be 0% (off) when request = 0; solenoid resistance should match factory spec (consult service manual)
Compare actual hydraulic pressure measured with a mechanical gauge to the governor pressure PID to confirm discrepancy

Diagnostic algorithm

Retrieve stored codes and freeze-frame data; note conditions when code set.
Clear codes and perform a controlled road or stall test while monitoring live PIDs: governor pressure, requested pressure, solenoid duty, gear selection.
Visually inspect connectors and wiring for the governor pressure sensor/switch and pressure control solenoids; repair any damaged wiring or poor connections.
Check transmission fluid level and condition; if low or degraded, correct level and replace fluid/filter then retest.
With a scan tool, confirm TCM requests 0 psi while measured governor pressure is high. If so, backprobe sensor connector and measure sensor voltage with ignition on; verify it follows pressure PID behavior.
Install a mechanical pressure gauge at the governor/regulated pressure test port (per service manual) and compare to scan-tool PID. If mechanical gauge also shows elevated pressure, suspect hydraulic/mechanical fault.
If mechanical pressure is correct but PID is high, suspect sensor or wiring; check sensor resistance (if applicable) and replace sensor/switch if out of spec.
If mechanical pressure is high, inspect valve body, pressure regulator/governor valve and pressure control solenoids for sticking or internal leakage; clean or repair valve body as needed.
If wiring, sensor, and valve body check good but problem persists, consider TCM fault or software; perform TCM reflash or replacement only after verifying all other items.
After repairs, clear codes and perform road test to confirm code does not return.

Likely causes

Faulty governor pressure sensor/switch or its connector
Stuck or leaking pressure control/gov valve in valve body
Contaminated transmission fluid or clogged valve body passages
Wiring harness damage or poor connection to pressure sensor/solenoid
Faulty pressure control solenoid

Fault status

⚠️ Status

Governor pressure above 3 PSI when TCM request is 0 PSI — indicates unexpected hydraulic pressure or incorrect pressure signal to the transmission control module.

🔴 Repair difficulty: Hard

⏱️ Diagnostic time: 1.5 - 4.0 hours

Similar codes

Your experience will help others

+100 karma for a short comment :)

Was this AI description helpful?

Your feedback helps improve AI descriptions.

👍 Like 0 👎 Dislike 0

Send to email