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THE CODE DIRECTORY

Diagnostic code references — Page 47.

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

11,786 code references

Buick / Cadillac +5
P1135

HO2S Lean Average Bank 1 Sensor 1

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Ford / Lincoln +1
P1135

Pedal Position Sensor A Circuit Intermittent

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Lexus
P1135

Air/Fuel Ratio Sensor Heater Circuit Malfunction Bank 1 Sensor 1

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Mazda
P1135

HO2S Bank 1 Sensor 1 Heater Circuit Low Input

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Nissan
P1135

Intake Valve Timing Control Circuit Bank 2

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Toyota
P1135

Air/Fuel Sensor Heater Circuit Response Bank 1 Sensor 1

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Volkswagen
P1135

Oxygen Sensor Heating Circuit Bank 1 + 2 Sensor 2 Electrical Malfunction

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BMW
P1136

O2 Sensor Heater Circuit High Voltage Bank 1 Sensor 1

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Buick / Cadillac +5
P1136

HO2S Rich Average Bank 1 Sensor 1

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Jaguar
P1136

Control Box Fan Circuit

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Mazda
P1136

HO2S Bank 1 Sensor 1 Heater Circuit High Input

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Volkswagen
P1136

Long Term Fuel Trim Add Fuel Bank 1 System Too Lean

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BMW
P1137

O2 Sensor Heater Circuit Signal Intermittent Bank 1 Sensor 2

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Buick / Cadillac +5
P1137

HO2S Bank 1 Sensor 2 Lean Or Low Voltage

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Ford / Lincoln +1
P1137

Lack of Downstream Heated Oxygen Sensor Switch Sensor Indicates Lean Bank 1

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Jaguar
P1137

Lack Of HO2S12 Switches Sensor Indicates Lean

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Mazda
P1137

HO2S Bank 1 Sensor 2 Not Switching Fuel Control Limit Reached

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Subaru
P1137

Front Oxygen AF Sensor Circuit Range Performance Problem

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Volkswagen
P1137

Long Term Fuel Trim Add Fuel Bank 1 System Too Rich

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BMW
P1138

O2 Sensor Heater Circuit Low Voltage Bank 1 Sensor 2

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Buick / Cadillac +5
P1138

HO2S Bank 1 Sensor 2 Rich Or High Voltage

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Ford / Lincoln +1
P1138

Lack of Downstream Heated Oxygen Sensor Switch Sensor Indicates Rich Bank 1

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Jaguar
P1138

Lack Of HO2S12 Switches Sensor Indicates Rich

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Mazda
P1138

HO2S Bank 1 Sensor 2 Signal Above 0.45v AF Ratio Too Rich

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Volkswagen
P1138

Long Term Fuel Trim Add Fuel Bank 2 System Too Lean

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BMW
P1139

O2 Sensor Heater Circuit High Voltage Bank 1 Sensor 2

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Buick / Cadillac +5
P1139

HO2S Insufficient Switching Bank 1 Sensor 2

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Ford / Lincoln +1
P1139

Water In Fuel Indicator Circuit Malfunction

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Subaru
P1139

Front Oxygen AF Sensor #1 Heater Circuit Performance Range Problem

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Volkswagen
P1139

Long Term Fuel Trim Add Fuel Bank 2 System Too Rich

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BMW
P1140

Mass Or Volume Air Flow Circuit Range Performance Problem

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Buick / Cadillac +5
P1140

HO2S Transition Time Ratio Bank 1 Sensor 2

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Ford / Lincoln +1
P1140

Water In Fuel Condition

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Kia
P1140

Load Calculation Cross Check

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Nissan
P1140

Intake Valve Timing Control Position Sensor Bank 1

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Volkswagen
P1140

Bank 2 Sensor 2 Resistance Too High

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Buick / Cadillac +5
P1141

HO2S Bank 1 Sensor 2 Average Voltage Level

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Ford / Lincoln +1
P1141

Fuel Restriction Indicator Circuit Malfunction

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Mazda
P1141

HO2S Bank 1 Sensor 2 Heater Circuit Low Input

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Subaru
P1141

Mass Air Flow Sensor Circuit High Input

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Volkswagen
P1141

Load Calculation Cross Check Range Performance

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Ford / Lincoln +1
P1142

Fuel Restriction Condition

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Mazda
P1142

HO2S Bank 1 Sensor 2 Heater Circuit High Input

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Subaru
P1142

Mass Air Flow Sensor Circuit Low Input

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Volkswagen
P1142

Load Calculation Cross Check Lower Limit Exceeded

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Buick / Cadillac +5
P1143

HO2S Bank 1 Sensor 3 Lean Or Low Voltage

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Jaguar
P1143

Air Assisted Injector Control Valve Range Performance

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Mazda
P1143

HO2S Bank 1 Sensor 3 Signal Below 0.45v AF Ratio Too Lean

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Subaru
P1143

Pressure Sensor Circuit Low Input

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Volkswagen
P1143

Load Calculation Cross Check Upper Limit Exceeded

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Buick / Cadillac +5
P1144

HO2S Bank 1 Sensor 3 Rich Or High Voltage

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Jaguar
P1144

Air Assisted Injector Control Valve Circuit

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Mazda
P1144

HO2S Bank 1 Sensor 3 Signal Above 0.45v AF Ratio Too Rich

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Subaru
P1144

Pressure Sensor Circuit High Input

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Volkswagen
P1144

Mass Or Volume Air Flow Circuit Open/Short To Ground

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BMW
P1145

Solenoid Valve Running Losses Control Circuit Electrical

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Buick / Cadillac +5
P1145

HO2S Cross Counts Bank 1 Sensor 3

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Nissan
P1145

Intake Valve Timing Control Position Sensor Bank 2

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Volkswagen
P1145

Mass Or Volume Air Flow Circuit Short To B+

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Subaru
P1146

Pressure Sensor Circuit Range Performance Problem High Input

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Volkswagen
P1146

Mass Or Volume Air Flow Circuit Power Supply Malfunction

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Volkswagen
P1147

Oxygen Sensor Control Bank 2 System Too Lean

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Nissan
P1148

Closed Loop Control Bank 1

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Volkswagen
P1148

Oxygen Sensor Control Bank 2 System Too Rich

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Volkswagen
P1149

Oxygen Sensor Control Bank 1 Out Of Range

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Ford / Lincoln +1
P1150

Lack of Upstream Heated Oxygen Sensor Switch Adaptive Fuel Limit Bank 2

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Lexus
P1150

Air/Fuel Ratio Sensor Circuit Range Performance Malfunction Bank 2 Sensor 1

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Mazda
P1150

HO2S Bank 2 Sensor 1 Not Switching Fuel Control Limit Reached

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Subaru
P1150

Front Oxygen Sensor Heater Circuit High Input

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Toyota
P1150

Air/Fuel Sensor Circuit Range Performance Bank 1 Sensor 2

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Volkswagen
P1150

Oxygen Sensor Control Bank 2 Out Of Range

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BMW
P1151

O2 Sensor Heater Circuit Signal Intermittent Bank 2 Sensor 1

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Ford / Lincoln +1
P1151

Lack of Upstream Heated Oxygen Sensor Switch Sensor Indicates Lean Bank 2

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Mazda
P1151

HO2S Bank 2 Sensor 1 Signal Below 0.45v AF Ratio Too Lean

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Subaru
P1151

Rear Oxygen Sensor Heater Circuit High Input

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Volkswagen
P1151

Bank 1 Long Term Fuel Trim Range 1 Lower Lean Limit Exceeded

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BMW
P1152

O2 Sensor Heater Circuit Low Voltage Bank 2 Sensor 1

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Ford / Lincoln +1
P1152

Lack of Upstream Heated Oxygen Sensor Switch Sensor Indicates Rich Bank 2

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Mazda
P1152

HO2S Bank 2 Sensor 1 Signal Above 0.45v AF Ratio Too Rich

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Volkswagen
P1152

Bank 1 Long Term Fuel Trim Range 2 Lower Lean Limit Exceeded

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BMW
P1153

O2 Sensor Heater Circuit High Voltage Bank 2 Sensor 1

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Buick / Cadillac +5
P1153

HO2S Insufficient Switching

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Ford / Lincoln +1
P1153

Bank 2 Fuel Control Shifted Lean

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Lexus
P1153

Air/Fuel Ratio Sensor Circuit Response Malfunction Bank 2 Sensor 1

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Mazda
P1153

Bank 2 Fuel Control Shifted Lean FAOSC

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Toyota
P1153

Air/Fuel Sensor Circuit Response Bank 1 Sensor 2

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Buick / Cadillac +5
P1154

HO2S Transition Time Ratio

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Ford / Lincoln +1
P1154

Bank 2 Fuel Control Shifted Rich

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Mazda
P1154

Bank 2 Fuel Control Shifted Rich FAOSC

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Volkswagen
P1154

Manifold Switch Over Malfunction

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BMW
P1155

O2 Sensor Heater Circuit Intermittent Bank 2 Sensor 2

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Buick / Cadillac +5
P1155

HO2S Lean Average Bank 2 Sensor 1

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Ford / Lincoln +1
P1155

Alternative Fuel Controller

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Lexus
P1155

Air/Fuel Ratio Sensor Heater Circuit Malfunction Bank 1 Sensor 1

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Toyota
P1155

Air/Fuel Sensor Heater Circuit Bank 1 Sensor 2

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Volkswagen
P1155

Manifold Absolute Pressure Sensor Circuit Short To B+

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BMW
P1156

O2 Sensor Heater Circuit Low Voltage Bank 2 Sensor 2

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Buick / Cadillac +5
P1156

HO2S Rich Average Bank 2 Sensor 1

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Volkswagen
P1156

Manifold Absolute Pressure Sensor Circuit Open/Short To Ground

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BMW
P1157

O2 Sensor Heater Circuit High Voltage Bank 2 Sensor 2

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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.