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Home / DTC / P0774 — Shift Solenoid E Intermittent

P0774 — Shift Solenoid E Intermittent

Detailed page for trouble code P0774.

34,405codes
59brands
11,914generic
22,491specific
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Code

P0774

Generic P — Powertrain

Shift Solenoid E Intermittent

Brand: Generic
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Intermittent open or short in the solenoid E electrical circuit
  • Corroded, loose or damaged connector or wiring to solenoid E
  • Failed or sticking shift solenoid E (internal valve body issue)
  • Contaminated or degraded automatic transmission fluid (ATF) causing valve/solenoid sticking
  • Poor ground or low battery/charging system voltage during operation
  • Faulty transmission control module (rare)

Symptoms

  • Check Engine Light / Transmission warning light illuminated
  • Intermittent harsh, delayed, or erratic gear shifts
  • Vehicle may enter limp/low‑gear mode
  • Unexpected downshifts or upshifts
  • Reduced drivability and fuel economy
  • Possible abnormal transmission noises if valve body sticking

What to check

  • Read and record DTCs and freeze frame data with a capable scan tool; check for pending/multiple transmission codes
  • Inspect ATF level and condition (color, smell, contamination)
  • Visually inspect wiring harness, connectors, and pins at the valve body and PCM/TCM for corrosion, damage, or looseness
  • Check battery/charging system voltage under load
  • Perform a continuity and resistance check of the solenoid circuit from PCM to the solenoid connector
  • Backprobe solenoid connector and monitor signal with scan tool/live data or multimeter while exercising transmission

Signal parameters

  • Expected solenoid coil resistance: typically low ohms range (varies by application) — consult vehicle service data
  • Connector/reference voltage: typically battery voltage (0–12 V) when driven; circuit may be switched or PWM-driven by PCM
  • PWM duty cycle: 0–100% depending on commanded position/shift state (varies by manufacturer)
  • Switching frequency: often low Hz to few hundred Hz depending on control strategy
  • Intermittent faults often show rapid fluctuations in commanded value vs actual feedback in live data

Diagnostic algorithm

  1. Retrieve all transmission and engine codes plus freeze frame. Note conditions when code set (speed, temperature, gear).
  2. Verify ATF level/condition. If fluid is very dirty or burnt, consider fluid/filter service before further testing.
  3. Inspect harness and connectors at the valve body and PCM/TCM for corrosion, damage, or loose pins. Repair any poor connections.
  4. With key on/engine running as required, backprobe solenoid E connector and monitor voltage while commanding the solenoid with a scan tool. Look for intermittent voltage, unexpected drops, or no response.
  5. Measure solenoid coil resistance with connector disconnected. Compare to spec. Check for intermittent change while gently wiggling harness.
  6. Perform a bench or direct-power test of the solenoid (if removable) to confirm mechanical/electrical operation, observing current draw for spikes or opens.
  7. If wiring and solenoid check good, check PCM/TCM output driver for intermittent operation; inspect for water intrusion or connector corrosion at module.
  8. If intermittent persists and wiring/PCM are good, remove valve body and inspect solenoid valve and bore for contamination, wear, or sticking. Replace solenoid or valve body components as required.
  9. After repairs, clear codes and perform a test drive under similar conditions to confirm the fault does not return. Monitor live data during test drive.

Likely causes

  • Wiring harness damage (chafed wire, pinched, rodent chew)
  • Corroded connector at solenoid or valve body
  • Solenoid internal coil intermittent or intermittent valve seizure
  • Insufficient ATF level or degraded ATF causing intermittent hydraulic control
  • Intermittent PCM/TCM output driver or internal connector fault

Fault status

⚠️ Status
P0774 — Shift Solenoid E Intermittent: TCM detected intermittent operation of transmission shift solenoid E. May cause erratic shifting, limp mode, and stored transmission fault codes. Inspect wiring, connectors, fluid, and solenoid.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

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Code

P0774

GWM P — Powertrain

- Malfunction of solenoid switch E

Brand: GWM
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Intermittent open or short in the solenoid E electrical circuit
  • Corroded, loose or damaged connector or wiring to solenoid E
  • Failed or sticking shift solenoid E (internal valve body issue)
  • Contaminated or degraded automatic transmission fluid (ATF) causing valve/solenoid sticking
  • Poor ground or low battery/charging system voltage during operation
  • Faulty transmission control module (rare)

Symptoms

  • Check Engine Light / Transmission warning light illuminated
  • Intermittent harsh, delayed, or erratic gear shifts
  • Vehicle may enter limp/low‑gear mode
  • Unexpected downshifts or upshifts
  • Reduced drivability and fuel economy
  • Possible abnormal transmission noises if valve body sticking

What to check

  • Read and record DTCs and freeze frame data with a capable scan tool; check for pending/multiple transmission codes
  • Inspect ATF level and condition (color, smell, contamination)
  • Visually inspect wiring harness, connectors, and pins at the valve body and PCM/TCM for corrosion, damage, or looseness
  • Check battery/charging system voltage under load
  • Perform a continuity and resistance check of the solenoid circuit from PCM to the solenoid connector
  • Backprobe solenoid connector and monitor signal with scan tool/live data or multimeter while exercising transmission

Signal parameters

  • Expected solenoid coil resistance: typically low ohms range (varies by application) — consult vehicle service data
  • Connector/reference voltage: typically battery voltage (0–12 V) when driven; circuit may be switched or PWM-driven by PCM
  • PWM duty cycle: 0–100% depending on commanded position/shift state (varies by manufacturer)
  • Switching frequency: often low Hz to few hundred Hz depending on control strategy
  • Intermittent faults often show rapid fluctuations in commanded value vs actual feedback in live data

Diagnostic algorithm

  1. Retrieve all transmission and engine codes plus freeze frame. Note conditions when code set (speed, temperature, gear).
  2. Verify ATF level/condition. If fluid is very dirty or burnt, consider fluid/filter service before further testing.
  3. Inspect harness and connectors at the valve body and PCM/TCM for corrosion, damage, or loose pins. Repair any poor connections.
  4. With key on/engine running as required, backprobe solenoid E connector and monitor voltage while commanding the solenoid with a scan tool. Look for intermittent voltage, unexpected drops, or no response.
  5. Measure solenoid coil resistance with connector disconnected. Compare to spec. Check for intermittent change while gently wiggling harness.
  6. Perform a bench or direct-power test of the solenoid (if removable) to confirm mechanical/electrical operation, observing current draw for spikes or opens.
  7. If wiring and solenoid check good, check PCM/TCM output driver for intermittent operation; inspect for water intrusion or connector corrosion at module.
  8. If intermittent persists and wiring/PCM are good, remove valve body and inspect solenoid valve and bore for contamination, wear, or sticking. Replace solenoid or valve body components as required.
  9. After repairs, clear codes and perform a test drive under similar conditions to confirm the fault does not return. Monitor live data during test drive.

Likely causes

  • Wiring harness damage (chafed wire, pinched, rodent chew)
  • Corroded connector at solenoid or valve body
  • Solenoid internal coil intermittent or intermittent valve seizure
  • Insufficient ATF level or degraded ATF causing intermittent hydraulic control
  • Intermittent PCM/TCM output driver or internal connector fault

Fault status

⚠️ Status
P0774 — Shift Solenoid E Intermittent: TCM detected intermittent operation of transmission shift solenoid E. May cause erratic shifting, limp mode, and stored transmission fault codes. Inspect wiring, connectors, fluid, and solenoid.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

P0754 P0764 P0776 P0750 P0705
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Code

P0774

HUMMER P — Powertrain

Shift Solenoid E Intermittent

Brand: HUMMER
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Intermittent open or short in the solenoid E electrical circuit
  • Corroded, loose or damaged connector or wiring to solenoid E
  • Failed or sticking shift solenoid E (internal valve body issue)
  • Contaminated or degraded automatic transmission fluid (ATF) causing valve/solenoid sticking
  • Poor ground or low battery/charging system voltage during operation
  • Faulty transmission control module (rare)

Symptoms

  • Check Engine Light / Transmission warning light illuminated
  • Intermittent harsh, delayed, or erratic gear shifts
  • Vehicle may enter limp/low‑gear mode
  • Unexpected downshifts or upshifts
  • Reduced drivability and fuel economy
  • Possible abnormal transmission noises if valve body sticking

What to check

  • Read and record DTCs and freeze frame data with a capable scan tool; check for pending/multiple transmission codes
  • Inspect ATF level and condition (color, smell, contamination)
  • Visually inspect wiring harness, connectors, and pins at the valve body and PCM/TCM for corrosion, damage, or looseness
  • Check battery/charging system voltage under load
  • Perform a continuity and resistance check of the solenoid circuit from PCM to the solenoid connector
  • Backprobe solenoid connector and monitor signal with scan tool/live data or multimeter while exercising transmission

Signal parameters

  • Expected solenoid coil resistance: typically low ohms range (varies by application) — consult vehicle service data
  • Connector/reference voltage: typically battery voltage (0–12 V) when driven; circuit may be switched or PWM-driven by PCM
  • PWM duty cycle: 0–100% depending on commanded position/shift state (varies by manufacturer)
  • Switching frequency: often low Hz to few hundred Hz depending on control strategy
  • Intermittent faults often show rapid fluctuations in commanded value vs actual feedback in live data

Diagnostic algorithm

  1. Retrieve all transmission and engine codes plus freeze frame. Note conditions when code set (speed, temperature, gear).
  2. Verify ATF level/condition. If fluid is very dirty or burnt, consider fluid/filter service before further testing.
  3. Inspect harness and connectors at the valve body and PCM/TCM for corrosion, damage, or loose pins. Repair any poor connections.
  4. With key on/engine running as required, backprobe solenoid E connector and monitor voltage while commanding the solenoid with a scan tool. Look for intermittent voltage, unexpected drops, or no response.
  5. Measure solenoid coil resistance with connector disconnected. Compare to spec. Check for intermittent change while gently wiggling harness.
  6. Perform a bench or direct-power test of the solenoid (if removable) to confirm mechanical/electrical operation, observing current draw for spikes or opens.
  7. If wiring and solenoid check good, check PCM/TCM output driver for intermittent operation; inspect for water intrusion or connector corrosion at module.
  8. If intermittent persists and wiring/PCM are good, remove valve body and inspect solenoid valve and bore for contamination, wear, or sticking. Replace solenoid or valve body components as required.
  9. After repairs, clear codes and perform a test drive under similar conditions to confirm the fault does not return. Monitor live data during test drive.

Likely causes

  • Wiring harness damage (chafed wire, pinched, rodent chew)
  • Corroded connector at solenoid or valve body
  • Solenoid internal coil intermittent or intermittent valve seizure
  • Insufficient ATF level or degraded ATF causing intermittent hydraulic control
  • Intermittent PCM/TCM output driver or internal connector fault

Fault status

⚠️ Status
P0774 — Shift Solenoid E Intermittent: TCM detected intermittent operation of transmission shift solenoid E. May cause erratic shifting, limp mode, and stored transmission fault codes. Inspect wiring, connectors, fluid, and solenoid.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

P0754 P0764 P0776 P0750 P0705
Repair manuals

Manual library for HUMMER

138

Browse 138 HUMMER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

HUMMER

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Code

P0774

MERCEDES-BENZ P — Powertrain

Shift Solenoid E Intermittent

Brand: MERCEDES-BENZ
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Intermittent open or short in the solenoid E electrical circuit
  • Corroded, loose or damaged connector or wiring to solenoid E
  • Failed or sticking shift solenoid E (internal valve body issue)
  • Contaminated or degraded automatic transmission fluid (ATF) causing valve/solenoid sticking
  • Poor ground or low battery/charging system voltage during operation
  • Faulty transmission control module (rare)

Symptoms

  • Check Engine Light / Transmission warning light illuminated
  • Intermittent harsh, delayed, or erratic gear shifts
  • Vehicle may enter limp/low‑gear mode
  • Unexpected downshifts or upshifts
  • Reduced drivability and fuel economy
  • Possible abnormal transmission noises if valve body sticking

What to check

  • Read and record DTCs and freeze frame data with a capable scan tool; check for pending/multiple transmission codes
  • Inspect ATF level and condition (color, smell, contamination)
  • Visually inspect wiring harness, connectors, and pins at the valve body and PCM/TCM for corrosion, damage, or looseness
  • Check battery/charging system voltage under load
  • Perform a continuity and resistance check of the solenoid circuit from PCM to the solenoid connector
  • Backprobe solenoid connector and monitor signal with scan tool/live data or multimeter while exercising transmission

Signal parameters

  • Expected solenoid coil resistance: typically low ohms range (varies by application) — consult vehicle service data
  • Connector/reference voltage: typically battery voltage (0–12 V) when driven; circuit may be switched or PWM-driven by PCM
  • PWM duty cycle: 0–100% depending on commanded position/shift state (varies by manufacturer)
  • Switching frequency: often low Hz to few hundred Hz depending on control strategy
  • Intermittent faults often show rapid fluctuations in commanded value vs actual feedback in live data

Diagnostic algorithm

  1. Retrieve all transmission and engine codes plus freeze frame. Note conditions when code set (speed, temperature, gear).
  2. Verify ATF level/condition. If fluid is very dirty or burnt, consider fluid/filter service before further testing.
  3. Inspect harness and connectors at the valve body and PCM/TCM for corrosion, damage, or loose pins. Repair any poor connections.
  4. With key on/engine running as required, backprobe solenoid E connector and monitor voltage while commanding the solenoid with a scan tool. Look for intermittent voltage, unexpected drops, or no response.
  5. Measure solenoid coil resistance with connector disconnected. Compare to spec. Check for intermittent change while gently wiggling harness.
  6. Perform a bench or direct-power test of the solenoid (if removable) to confirm mechanical/electrical operation, observing current draw for spikes or opens.
  7. If wiring and solenoid check good, check PCM/TCM output driver for intermittent operation; inspect for water intrusion or connector corrosion at module.
  8. If intermittent persists and wiring/PCM are good, remove valve body and inspect solenoid valve and bore for contamination, wear, or sticking. Replace solenoid or valve body components as required.
  9. After repairs, clear codes and perform a test drive under similar conditions to confirm the fault does not return. Monitor live data during test drive.

Likely causes

  • Wiring harness damage (chafed wire, pinched, rodent chew)
  • Corroded connector at solenoid or valve body
  • Solenoid internal coil intermittent or intermittent valve seizure
  • Insufficient ATF level or degraded ATF causing intermittent hydraulic control
  • Intermittent PCM/TCM output driver or internal connector fault

Fault status

⚠️ Status
P0774 — Shift Solenoid E Intermittent: TCM detected intermittent operation of transmission shift solenoid E. May cause erratic shifting, limp mode, and stored transmission fault codes. Inspect wiring, connectors, fluid, and solenoid.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

P0754 P0764 P0776 P0750 P0705
856

Browse 856 MERCEDES-BENZ manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

MERCEDES-BENZ

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+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
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