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THE CODE DIRECTORY

Diagnostic code references — Page 11.

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

11,786 code references

Generic OBD-II
P014E

O2 Sensor Slow Response - Rich to Lean Bank 2 Sensor 1

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Generic OBD-II
P014F

O2 Sensor Slow Response - Lean to Rich Bank 2 Sensor 1

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Generic OBD-II
P0150

O2 Sensor Circuit Bank 2 Sensor 1

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Generic OBD-II
P0151

O2 Sensor Circuit Low Voltage Bank 2 Sensor 1

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Generic OBD-II
P0152

O2 Sensor Circuit High Voltage Bank 2 Sensor 1

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Generic OBD-II
P0153

O2 Sensor Circuit Slow Response Bank 2 Sensor 1

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Generic OBD-II
P0154

O2 Sensor Circuit No Activity Detected Bank 2 Sensor 1

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Generic OBD-II
P0155

O2 Sensor Heater Circuit Bank 2 Sensor 1

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Generic OBD-II
P0156

O2 Sensor Circuit Bank 2 Sensor 2

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Generic OBD-II
P0157

O2 Sensor Circuit Low Voltage Bank 2 Sensor 2

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Generic OBD-II
P0158

O2 Sensor Circuit High Voltage Bank 2 Sensor 2

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Generic OBD-II
P0159

O2 Sensor Circuit Slow Response Bank 2 Sensor 2

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Generic OBD-II
P015A

O2 Sensor Delayed Response - Rich to Lean Bank 1 Sensor 1

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Generic OBD-II
P015B

O2 Sensor Delayed Response - Lean to Rich Bank 1 Sensor 1

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Generic OBD-II
P015C

O2 Sensor Delayed Response - Rich to Lean Bank 2 Sensor 1

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Generic OBD-II
P015D

O2 Sensor Delayed Response - Lean to Rich Bank 2 Sensor 1

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Generic OBD-II
P015E

Excessive Time to Enter Closed Loop Fuel Timing Control

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Generic OBD-II
P015F

Excessive Time to Enter Closed Loop Cylinder Balance Control

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Generic OBD-II
P0160

O2 Sensor Circuit No Activity Detected Bank 2 Sensor 2

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Generic OBD-II
P0161

O2 Sensor Heater Circuit Bank 2 Sensor 2

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Generic OBD-II
P0162

O2 Sensor Circuit Bank 2 Sensor 3

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Generic OBD-II
P0163

O2 Sensor Circuit Low Voltage Bank 2 Sensor 3

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Generic OBD-II
P0164

O2 Sensor Circuit High Voltage Bank 2 Sensor 3

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Generic OBD-II
P0165

O2 Sensor Circuit Slow Response Bank 2 Sensor 3

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Generic OBD-II
P0166

O2 Sensor Circuit No Activity Detected Bank 2 Sensor 3

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Generic OBD-II
P0167

O2 Sensor Heater Circuit Bank 2 Sensor 3

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Generic OBD-II
P0168

Fuel Temperature Too High

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Generic OBD-II
P0169

Incorrect Fuel Composition

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Generic OBD-II
P016A

Excessive Time To Enter Closed Loop Air/Fuel Ratio Control

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Generic OBD-II
P016B

Closed Loop Air/Fuel Ratio Control At Limit - System Too Rich

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Generic OBD-II
P016C

Closed Loop Air/Fuel Ratio Control At Limit - System Too Lean

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Generic OBD-II
P016D

Excessive Time To Enter Closed Loop Fuel Pressure Control

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Generic OBD-II
P016E

Closed Loop Fuel Pressure Control At Limit - Pressure Too High

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Generic OBD-II
P016F

Closed Loop Fuel Pressure Control At Limit - Pressure Too Low

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Generic OBD-II
P0170

Fuel Trim Bank 1

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Generic OBD-II
P0171

System Too Lean Bank 1

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Generic OBD-II
P0172

System Too Rich Bank 1

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Generic OBD-II
P0173

Fuel Trim Bank 2

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Generic OBD-II
P0174

System Too Lean Bank 2

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Generic OBD-II
P0175

System Too Rich Bank 2

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Generic OBD-II
P0176

Fuel Composition Sensor Circuit

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Generic OBD-II
P0177

Fuel Composition Sensor Circuit Range/Performance

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Generic OBD-II
P0178

Fuel Composition Sensor Circuit Low

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Generic OBD-II
P0179

Fuel Composition Sensor Circuit High

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Generic OBD-II
P017A

Cylinder Head Temperature Sensor A Circuit

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Generic OBD-II
P017B

Cylinder Head Temperature Sensor A Range/Performance

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Generic OBD-II
P017C

Cylinder Head Temperature Sensor A Circuit Low

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Generic OBD-II
P017D

Cylinder Head Temperature Sensor A Circuit High

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Generic OBD-II
P017E

Cylinder Head Temperature Sensor A Circuit Intermittent/Erratic

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Generic OBD-II
P017F

EVAP System Leak Detection Pump Module Air Filter Restricted

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Generic OBD-II
P0180

Fuel Temperature Sensor A Circuit

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Generic OBD-II
P0181

Fuel Temperature Sensor A Circuit Range/Performance

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Generic OBD-II
P0182

Fuel Temperature Sensor A Circuit Low

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Generic OBD-II
P0183

Fuel Temperature Sensor A Circuit High

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Generic OBD-II
P0184

Fuel Temperature Sensor A Circuit Intermittent

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Generic OBD-II
P0185

Fuel Temperature Sensor B Circuit

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Generic OBD-II
P0186

Fuel Temperature Sensor B Circuit Range/Performance

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Generic OBD-II
P0187

Fuel Temperature Sensor B Circuit Low

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Generic OBD-II
P0188

Fuel Temperature Sensor B Circuit High

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Generic OBD-II
P0189

Fuel Temperature Sensor B Circuit Intermittent

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Generic OBD-II
P018A

Fuel Pressure Sensor B Circuit

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Generic OBD-II
P018B

Fuel Pressure Sensor B Circuit Range/Performance

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Generic OBD-II
P018C

Fuel Pressure Sensor B Circuit Low

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Generic OBD-II
P018D

Fuel Pressure Sensor B Circuit High

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Generic OBD-II
P018E

Fuel Pressure Sensor B Circuit Intermittent/Erratic

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Generic OBD-II
P018F

Fuel System Over Pressure Relief Valve Frequent Activation

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Generic OBD-II
P0190

Fuel Rail Pressure Sensor Circuit Bank 1

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Generic OBD-II
P0191

Fuel Rail Pressure Sensor Circuit Range/Performance Bank 1

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Generic OBD-II
P0192

Fuel Rail Pressure Sensor Circuit Low Bank 1

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Generic OBD-II
P0193

Fuel Rail Pressure Sensor Circuit High Bank 1

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Generic OBD-II
P0194

Fuel Rail Pressure Sensor Circuit Intermittent/Erratic Bank 1

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Generic OBD-II
P0195

Engine Oil Temperature Sensor A Circuit

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Generic OBD-II
P0196

Engine Oil Temperature Sensor A Range/Performance

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Generic OBD-II
P0197

Engine Oil Temperature Sensor A Circuit Low

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Generic OBD-II
P0198

Engine Oil Temperature Sensor A Circuit High

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Generic OBD-II
P0199

Engine Oil Temperature Sensor A Circuit Intermittent/Erratic

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Generic OBD-II
P019A

O2 Sensor Delayed Response - Rich to Lean Bank 1 Sensor 3

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Generic OBD-II
P019B

O2 Sensor Delayed Response - Lean to Rich Bank 1 Sensor 3

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Generic OBD-II
P019C

O2 Sensor Delayed Response - Rich to Lean Bank 2 Sensor 3

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Generic OBD-II
P019D

O2 Sensor Delayed Response - Lean to Rich Bank 2 Sensor 3

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Generic OBD-II
P019E

Alternative Fuel Tank A Pressure Sensor Circuit

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Generic OBD-II
P019F

Alternative Fuel Tank A Pressure Sensor Performance

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Generic OBD-II
P01A0

Alternative Fuel Tank A Pressure Sensor Circuit Low

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Generic OBD-II
P01A1

Alternative Fuel Tank A Pressure Sensor Circuit High

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Generic OBD-II
P01A2

Alternative Fuel Tank A Pressure Sensor Circuit Intermittent/Erratic

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Generic OBD-II
P01A3

Alternative Fuel Rail Pressure Sensor Circuit

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Generic OBD-II
P01A4

Alternative Fuel Rail Pressure Sensor Performance

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Generic OBD-II
P01A5

Alternative Fuel Rail Pressure Sensor Circuit Low

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Generic OBD-II
P01A6

Alternative Fuel Rail Pressure Sensor Circuit High

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Generic OBD-II
P01A7

Alternative Fuel Rail Pressure Sensor Circuit Intermittent/Erratic

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Generic OBD-II
P01A8

Alternative Fuel Rail/System Pressure - Too Low

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Generic OBD-II
P01A9

Alternative Fuel Rail/System Pressure - Too High

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Generic OBD-II
P01AA

Alternative Fuel Tank Temperature Sensor Circuit

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Generic OBD-II
P01AB

Alternative Fuel Tank Temperature Sensor Range/Performance

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Generic OBD-II
P01AC

Alternative Fuel Tank Temperature Sensor Circuit Low

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Generic OBD-II
P01AD

Alternative Fuel Tank Temperature Sensor Circuit High

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Generic OBD-II
P01AE

Alternative Fuel Tank Temperature Sensor Circuit Intermittent/Erratic

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Generic OBD-II
P01AF

Alternative Fuel Tank A Level Sensor Circuit

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Generic OBD-II
P01B0

Alternative Fuel Tank A Level Sensor Range/Performance

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Generic OBD-II
P01B1

Alternative Fuel Tank A Level Sensor Circuit Low

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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.