P0762
Shift Solenoid B Electrical/ 2-3 Shift Solenoid Circuit Electrical
Powertrain Transmission Control Solenoid Circuit 🟡 Moderate — Fix within a week
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What This Actually Means
In plain language — no jargon

The transmission's 2-3 shift solenoid (which controls fluid flow to switch gears) has an electrical problem—either a broken wire, bad connector, or failed solenoid coil. It's like a light switch that won't turn on or off properly, so your transmission can't shift smoothly between 2nd and 3rd gear.

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Symptoms You May Notice
3 known symptoms for this code
Transmission stuck in 2nd gear or refuses to shift to 3rd
Check Engine Light illuminated
Harsh or delayed gear shifts, or transmission slipping
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Embedded Systems Insight
What the ECU/ECM is actually computing

The ECM commands the 2-3 shift solenoid with a pulse-width modulated voltage signal (typically 12V) and monitors the solenoid coil's electrical resistance and current draw. The solenoid should respond by opening/closing hydraulic passages within 50–200 milliseconds. If resistance is out of range, current doesn't match expected load, or the solenoid doesn't engage, the ECM logs P0762.

Voltage & Parameter Thresholds

Parameter Normal Range Fault Condition
Solenoid Coil Resistance 4–8 ohms (varies by OEM) Open circuit (infinite ohms) or short to ground (<1 ohm)
Command Voltage Response 12V applied, solenoid engages within 200ms No voltage detected, low voltage, or no solenoid response
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Diagnostic & DIY Fix Guide
Check these in order — from cheapest to most complex
1
Transmission fluid and filter
Change fluid and filter; low/dirty fluid can cause solenoid sticking—check level first.
2
Solenoid B wiring harness and connectors
Inspect connector pins for corrosion, moisture, or loose terminals; clean contacts with electrical contact cleaner.
3
Shift Solenoid B assembly
If wiring and connectors are clean, the solenoid coil is likely failed and must be replaced.