THE CODE DIRECTORY

Diagnostic code references — Page 73.

Browse canonical reference entries. Each definition keeps its own source and vehicle-applicability limits.

11,786 code references

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.