THE CODE DIRECTORY
Diagnostic code references — Page 73.
Browse canonical reference entries. Each definition keeps its own source and vehicle-applicability limits.
Generic OBD-II
P2124
F-150 intermittent pedal faults and harness routing at the booster
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Generic OBD-II
P2125
APP2 is out of range on the secondary processor only
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Generic OBD-II
P2126
pedal channel two has an unresolved range classification
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Generic OBD-II
P2127
Accelerator pedal sensor 2 has a low or open signal
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Generic OBD-II
P2128
Accelerator pedal sensor 2 exceeds its electrical upper limit
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Generic OBD-II
P2129
Throttle/Pedal Position Sensor/Switch E Circuit Intermittent
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Generic OBD-II
P212A
Throttle Position Sensor/Switch G Circuit
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Generic OBD-II
P212B
When throttle-position information disagrees with the airflow model
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Generic OBD-II
P212C
The low-voltage limit for the second bank 2 throttle-position channel
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Generic OBD-II
P212D
A high signal on throttle-position sensor 2 at bank 2
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Generic OBD-II
P212E
Throttle Position Sensor/Switch G Circuit Intermittent
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Generic OBD-II
P212F
Throttle/Pedal Position Sensor/Switch F/G Voltage Correlation
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Generic OBD-II
P2130
Throttle/Pedal Position Sensor/Switch F Circuit
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Generic OBD-II
P2131
Throttle/Pedal Position Sensor/Switch F Circuit Range/Performance
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Generic OBD-II
P2132
Ford 6.0L pedal sensor F circuit voltage is low
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Generic OBD-II
P2133
the VAG high-signal fault can involve oxygen-sensor damage
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Generic OBD-II
P2134
Throttle/Pedal Position Sensor/Switch F Circuit Intermittent
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Generic OBD-II
P2135
Throttle position channels disagree after normalization
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Generic OBD-II
P2136
Throttle/Pedal Position Sensor/Switch A/C Voltage Correlation
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Generic OBD-II
P2137
Throttle/Pedal Position Sensor/Switch B/C Voltage Correlation
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Generic OBD-II
P2138
Accelerator pedal channels no longer agree
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Generic OBD-II
P2139
Throttle/Pedal Position Sensor/Switch D/F Voltage Correlation
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Generic OBD-II
P213A
EGR Throttle Control Circuit B /Open
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Generic OBD-II
P213B
Low-pressure EGR motor needs excessive control duty
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Generic OBD-II
P213C
EGR Throttle Control Circuit B Low
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Generic OBD-II
P213D
EGR Throttle Control Circuit B High
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Generic OBD-II
P213E
Fuel Injection System Fault - Forced Engine Shutdown
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Generic OBD-II
P213F
Fuel-pump shutdown following an accident message
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Generic OBD-II
P2140
Throttle/Pedal Position Sensor/Switch E/F Voltage Correlation
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Generic OBD-II
P2141
EGR Throttle Control Circuit A Low
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Generic OBD-II
P2142
EGR Throttle Control Circuit A High
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Generic OBD-II
P2143
EGR Vent Control Circuit/Open
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Generic OBD-II
P2144
EGR Vent Control Circuit Low
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Generic OBD-II
P2145
EGR Vent Control Circuit High
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Generic OBD-II
P2146
The injector group A supply diagnosis includes short-circuit behavior
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Generic OBD-II
P2147
Injector 1 high-side circuit indicates a short to ground
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Generic OBD-II
P2148
Injector 1 remains electrically high when its driver is off
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Generic OBD-II
P2149
Reading injector group B supply faults through driver state
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Generic OBD-II
P214A
SCR NOx Catalyst Inlet Temperature Too High
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Generic OBD-II
P214B
SCR NOx Catalyst Inlet Temperature Too High During Particulate Filter Regeneration
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Generic OBD-II
P214C
SCR NOx Catalyst Outlet Temperature Too High
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Generic OBD-II
P214D
SCR NOx Catalyst Outlet Temperature Too High During Particulate Filter Regeneration
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Generic OBD-II
P214E
pump overcurrent limits change in heating mode
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Generic OBD-II
P214F
What excessive current in DEF tank heater 1 actually establishes
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Generic OBD-II
P2150
Injector 2 high-side output fails its powered-on check
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Generic OBD-II
P2151
Injector 2 high-side output is high during its off state
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Generic OBD-II
P2152
Why injector group C supply diagnosis is not a flow test
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Generic OBD-II
P2153
Injector 3 supply driver shows a ground-short signature
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Generic OBD-II
P2154
Injector 3 high-side circuit indicates unwanted power
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Generic OBD-II
P2155
Interpreting injector group D’s high-side circuit fault across the source pages
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Generic OBD-II
P2156
Group D supply-low is assessed while its high-side driver is on
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Generic OBD-II
P2157
A group D high-supply fault is checked with the driver switched off
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Generic OBD-II
P2158
vehicle-speed signal two remains unchanged inside a qualified range
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Generic OBD-II
P2159
signal-two speed is outside its documented upper range
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Generic OBD-II
P215A
Wheel-speed information fails the brake controller’s correlation checks
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Generic OBD-II
P215B
speed correlation can fail because the trusted source is unavailable
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Generic OBD-II
P215C
845RE output-speed correlation and application-specific updates
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Generic OBD-II
P215D
Reductant Pump B Stuck On
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Generic OBD-II
P215E
Reductant Heater D Current Too Low
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Generic OBD-II
P215F
Reductant Heater D Current Too High
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Generic OBD-II
P2160
Near-zero transfer-case speed is judged against an expected-motion state
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Generic OBD-II
P2161
A transfer-case speed drop can compete with the no-activity timer
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Generic OBD-II
P2162
Vehicle Speed Sensor A/B Correlation
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Generic OBD-II
P2163
Throttle/Pedal Position Sensor A Maximum Stop Performance
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Generic OBD-II
P2164
Throttle/Pedal Position Sensor B Maximum Stop Performance
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Generic OBD-II
P2165
Throttle/Pedal Position Sensor C Maximum Stop Performance
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Generic OBD-II
P2166
Throttle/Pedal Position Sensor D Maximum Stop Performance
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Generic OBD-II
P2167
Throttle/Pedal Position Sensor E Maximum Stop Performance
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Generic OBD-II
P2168
Throttle/Pedal Position Sensor F Maximum Stop Performance
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Generic OBD-II
P2169
Exhaust Pressure Regulator Vent Solenoid Control Circuit/Open
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Generic OBD-II
P216A
Injector group E supply evidence and the importance of the high-side path
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Generic OBD-II
P216B
Group E low supply requires an on-state driver fault
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Generic OBD-II
P216C
A group E high result compares an off-state signal with its power source
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Generic OBD-II
P216D
The electrical alternatives hidden behind injector group F supply wording
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Generic OBD-II
P216E
The group F low-circuit assessment belongs to a powered high-side output
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Generic OBD-II
P216F
A high group F supply fault is an off-state relationship to controller power
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Generic OBD-II
P2170
Exhaust Pressure Regulator Vent Solenoid Control Circuit Low
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Generic OBD-II
P2171
Exhaust Pressure Regulator Vent Solenoid Control Circuit High
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Generic OBD-II
P2172
Ram high-airflow faults and the two 6.4 L calibration choices
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Generic OBD-II
P2173
Renegade manifold-air comparison and the oil-vapor tube
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Generic OBD-II
P2174
Throttle Actuator Control System - Sudden Low Air Flow Detected
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Generic OBD-II
P2175
Throttle Actuator Control System - Low Air Flow Detected
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Generic OBD-II
P2176
Minimum throttle position was not learned after repeated attempts
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Generic OBD-II
P2177
When bank 1’s learned off-idle fuel correction exceeds its limit
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Generic OBD-II
P2178
A rich off-idle diagnosis based on bank 1’s learned correction
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Generic OBD-II
P2179
Interpreting bank 2’s excessive off-idle fuel adaptation
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Generic OBD-II
P217A
Understanding injector group G’s supply-side electrical monitor
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Generic OBD-II
P217B
Group G low supply is a repeated on-command electrical result
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Generic OBD-II
P217C
Group G high supply must be evaluated while its driver should be off
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Generic OBD-II
P217D
How injector group H supply faults are classified electrically
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Generic OBD-II
P217E
Group H low supply points to the energized high-side circuit
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Generic OBD-II
P217F
The group H high-circuit row contains an injector-number conflict
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Generic OBD-II
P2180
Bank 2 rich off-idle adaptation and the limits of a simple trim screenshot
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Generic OBD-II
P2181
Cooling-performance codes in an older FCA software case
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Generic OBD-II
P2182
Ford secondary coolant temperature fails cold-soak plausibility
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Generic OBD-II
P2183
Escape and Corsair PHEV coolant warnings require the overheat-code distinction
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Generic OBD-II
P2184
coolant sensor 2 low circuit uses a configurable resistance channel
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Generic OBD-II
P2185
coolant sensor 2 high-circuit row contains a channel conflict
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Generic OBD-II
P2186
coolant sensor 2 changes faster than its thermal model permits
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Generic OBD-II
P2187
Bank 1 lean-at-idle evidence comes from the additive trim component
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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.