P CODE FAMILY
Powertrain code references — Page 20.
Engine, transmission and powertrain diagnostic references. Exact vehicle and module context still matters.
Generic OBD-II
P0770
Solenoid E open-circuit monitoring is based on driver evidence
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Generic OBD-II
P0771
Solenoid E failed-off functionality can remain relevant after a good event
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Generic OBD-II
P0772
Solenoid E failed-on behavior is distinct from a high circuit signal
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Generic OBD-II
P0773
The CW6A-EL on/off solenoid electrical circuit
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Generic OBD-II
P0774
Intermittent E-channel circuitry needs its own event evidence
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Generic OBD-II
P0775
Quest solenoid B command and feedback must agree
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Generic OBD-II
P0776
CVT primary-pulley pressure fails to follow a high command
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Generic OBD-II
P0777
C2 release behavior behind the solenoid B stuck-on code
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Generic OBD-II
P0778
Solenoid B feedback current fails to follow its target
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Generic OBD-II
P0779
Pressure Control Solenoid B Intermittent
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Generic OBD-II
P077A
Output Shaft Speed Sensor Circuit - Loss of Direction Signal
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Generic OBD-II
P077B
Output speed can have the right magnitude and the wrong direction
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Generic OBD-II
P077C
output-speed circuit voltage drops below its electrical boundary
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Generic OBD-II
P077D
output-speed sensor voltage is electrically too high
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Generic OBD-II
P077E
Transmission Fluid Temperature Measurement System - Multiple Sensor Correlation
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Generic OBD-II
P077F
Reverse 2 Incorrect Ratio
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Generic OBD-II
P0780
Quest shift performance requires more than an electrical code check
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Generic OBD-II
P0781
1-2 Shift
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Generic OBD-II
P0782
The second-to-third shift fails its speed plausibility check
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Generic OBD-II
P0783
the Jeep 3–4 shift did not produce the expected speed change
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Generic OBD-II
P0784
4-5 Shift
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Generic OBD-II
P0785
Shift Timing Solenoid A
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Generic OBD-II
P0786
Shift-timing solenoid current error under a stable command
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Generic OBD-II
P0787
Timing solenoid feedback stays low when commanded on
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Generic OBD-II
P0788
Timing-solenoid circuit stays high under an off command
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Generic OBD-II
P0789
Shift Timing Solenoid A Intermittent
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Generic OBD-II
P078A
Shift Timing Solenoid B
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Generic OBD-II
P078B
Shift Timing Solenoid B Range/Performance
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Generic OBD-II
P078C
Shift Timing Solenoid B Low
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Generic OBD-II
P078D
Shift Timing Solenoid B High
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Generic OBD-II
P078E
Shift Timing Solenoid B Intermittent
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Generic OBD-II
P078F
Transmission Mode Switch C Circuit
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Generic OBD-II
P0790
Normal/Performance Switch Circuit
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Generic OBD-II
P0791
Intermediate-speed circuit A must not be confused with its plausibility checks
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Generic OBD-II
P0792
clutch-1 speed checked against independent references
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Generic OBD-II
P0793
Intermediate Shaft Speed Sensor A Circuit No Signal
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Generic OBD-II
P0794
Intermediate-speed A intermittency needs more than an averaged speed trace
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Generic OBD-II
P0795
Quest solenoid C links converter lockup and shift pressure
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Generic OBD-II
P0796
CVT line-pressure performance compares both pulley pressures
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Generic OBD-II
P0797
GR10 solenoid C stuck-on criteria differ from adjacent clutches
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Generic OBD-II
P0798
SLC2 current feedback differs persistently from demand
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Generic OBD-II
P0799
Pressure Control Solenoid C Intermittent
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Generic OBD-II
P079A
Clutch one slip is evaluated while the clutch is loaded and filled
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Generic OBD-II
P079B
Clutch two has a one-second loaded-slip criterion
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Generic OBD-II
P079C
Clutch three uses a lower slip threshold than C1 and C2
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Generic OBD-II
P079D
Clutch four is judged over a short slip interval
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Generic OBD-II
P079E
Clutch 5 slips despite a locked-state command
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Generic OBD-II
P079F
Transmission Friction Element F Slip Detected
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Generic OBD-II
P07A0
Transmission Friction Element G Slip Detected
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Generic OBD-II
P07A1
Transmission Friction Element H Slip Detected
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Generic OBD-II
P07A2
Transmission Friction Element A Performance/Stuck Off
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Generic OBD-II
P07A3
A clutch that should release can be detected by unexpectedly low slip
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Generic OBD-II
P07A4
Transmission Friction Element B Performance/Stuck Off
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Generic OBD-II
P07A5
Mode-one clutch-two behavior distinguishes a stuck element
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Generic OBD-II
P07A6
Transmission Friction Element C Performance/Stuck Off
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Generic OBD-II
P07A7
Clutch-three release is evaluated against mode-two torque behavior
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Generic OBD-II
P07A8
Transmission Friction Element D Performance/Stuck Off
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Generic OBD-II
P07A9
Clutch four has different stuck-on tests in two hybrid modes
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Generic OBD-II
P07AA
Transmission Friction Element E Performance/Stuck Off
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Generic OBD-II
P07AB
Clutch 5 does not develop the expected release slip
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Generic OBD-II
P07AC
Transmission Friction Element F Performance/Stuck Off
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Generic OBD-II
P07AD
Transmission Friction Element F Stuck On
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Generic OBD-II
P07AE
Transmission Friction Element G Performance/Stuck Off
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Generic OBD-II
P07AF
Transmission Friction Element G Stuck On
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Generic OBD-II
P07B0
Transmission Friction Element H Performance/Stuck Off
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Generic OBD-II
P07B1
Transmission Friction Element H Stuck On
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Generic OBD-II
P07B2
Transmission Park Position Sensor/Switch A Circuit/Open
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Generic OBD-II
P07B3
Park-button switch A reads below its allowed range
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Generic OBD-II
P07B4
Park-button switch A high-signal qualification
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Generic OBD-II
P07B5
Park switch A sits between valid button states
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Generic OBD-II
P07B6
Transmission Park Position Sensor/Switch A Circuit Performance High
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Generic OBD-II
P07B7
Parking-lock input A frequency and mismatch need separate attention from pulse level
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Generic OBD-II
P07B8
Transmission Park Position Sensor/Switch B Circuit/Open
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Generic OBD-II
P07B9
Park-button channel B low-input detection
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Generic OBD-II
P07BA
Park-button switch B exceeds the high-signal boundary
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Generic OBD-II
P07BB
Park-button switch B has an unrecognized intermediate reading
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Generic OBD-II
P07BC
Transmission Park Position Sensor/Switch B Circuit Performance High
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Generic OBD-II
P07BD
Parking-lock input B has its own frequency or mismatch classification
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Generic OBD-II
P07BE
two valid Park-button channels disagree
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Generic OBD-II
P07BF
input-speed circuit low is distinct from low input RPM
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Generic OBD-II
P07C0
input-speed sensor voltage exceeds the high-input limit
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Generic OBD-II
P07C1
Input/Turbine Shaft Speed Sensor B Circuit Low
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Generic OBD-II
P07C2
Input/Turbine Shaft Speed Sensor B Circuit High
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Generic OBD-II
P07C3
Input/Turbine Shaft Speed Sensor C Circuit Low
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Generic OBD-II
P07C4
Input/Turbine Shaft Speed Sensor C Circuit High
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Generic OBD-II
P07C5
odd-clutch speed input voltage below range
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Generic OBD-II
P07C6
Intermediate speed A high includes pulse-quality checks
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Generic OBD-II
P07C7
Intermediate speed B low is an average signal-voltage check
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Generic OBD-II
P07C8
Intermediate speed B high can also report implausible pulse encoding
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Generic OBD-II
P07C9
Intermediate Shaft Speed Sensor C Circuit Low
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Generic OBD-II
P07CA
Intermediate Shaft Speed Sensor C Circuit High
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Generic OBD-II
P07CB
Transmission Fluid Thermostat Performance
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Generic OBD-II
P07CC
Transmission Mode Switch C Circuit Low
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Generic OBD-II
P07CD
Transmission Mode Switch C Circuit High
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Generic OBD-II
P07CE
tour-mode request remains asserted too long
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Generic OBD-II
P07CF
Transmission Mode Switch D Circuit Low
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Generic OBD-II
P07D0
Transmission Mode Switch D Circuit High
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Generic OBD-II
P07D1
comfort-mode switch input stays true beyond the monitor interval
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Generic OBD-II
P07D2
Transmission Mode Switch E Circuit Low
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Generic OBD-II
P07D3
Transmission Mode Switch E Circuit High
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These are code references, not a list of confirmed faults on every vehicle. Read the source and applicability notes, then match the exact vehicle, year, engine and scan report.