THE CODE DIRECTORY

Diagnostic code references — Page 48.

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

Buick / Cadillac +5

P1157

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.

HO2S Bank 2 Sensor 2 Lean System Or Low Voltage

Ford bank-two downstream oxygen signal remains lean in its response test

Lack Of HO2S22 Switches Sensor Indicates Lean

Manifold Absolute Pressure Sensor Circuit Power Supply Malfunction

Fuel Trim Adaptation Additive Bank 1 Low

HO2S Bank 2 Sensor 2 Rich Or High Voltage

Ford bank-two rear oxygen channel stays rich during the response evaluation

Lack Of HO2S22 Switches Sensor Indicates Rich

Manifold Absolute Pressure Sensor Circuit Range Performance

Fuel Trim Adaptation Additive Bank 1 High

HO2S Cross Counts Bank 2 Sensor 2

Fuel Trim Adaptation Additive Bank 2 Low

Volkswagen intake temperature fault and the 136.8°C substitute value

Fuel Trim Adaptation Additive Bank 2 High

HO2S Heater Power Stage Circuit Bank 2 Sensor 2

G72 intake-temperature circuit faults may have few symptoms

Fuel Trim Adaptation Additive Per Ignition Bank 1 Low

Honda A/F sensor circuit fault: separate signal wiring from the sensor

Fuel Temperature Sensor Circuit Short To Ground

Fuel Trim Adaptation Additive Per Ignition Bank 1 High

HO2S Bank 2 Sensor 3 Lean System Or Low Voltage

HO2S11 Slow Response Bank 1 Sensor 1

Volkswagen fuel-temperature sensor G81 open or short to supply

Fuel Trim Adaptation Additive Per Ignition Bank 2 Low

HO2S Bank 2 Sensor 3 Rich Or High Voltage

Honda A/F sensor performance during deceleration

Fuel Temperature Sensor Range Performance

Fuel Trim Adaptation Additive Per Ignition Bank 2 High

HO2S Cross Counts Bank 2 Sensor 2

HO2S11 Slow Response Bank 1 Sensor 1

Maxima swirl-vacuum switch stays in the wrong state

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

Honda A/F heater command and feedback disagree

Bank 1 Long Term Fuel Trim Range 2 Upper Rich Limit Exceeded

Honda A/F heater fault and the P1162 diagnostic priority

Ford fuel-rail pressure remains in range but is too low

HO2S11 Label Circuit Low Voltage Fault Bank 1 Sensor 1

Closed Loop Control Bank 2

Ford fuel-rail pressure is in range but reported too high

HO2S11 Label Circuit High Voltage Fault Bank 1 Sensor 1

HO2S Bank 1 Sensor 1 Circuit Fixed Bank 1 Sensor 1

Bank To Bank Fuel Trim Offset

ESO Engine Shut Off Solenoid Fault

HO2S11 Circuit Voltage Stuck At Mid-Range

HO2S Bank 1 Sensor 1 Circuit Fixed Bank 1 Sensor 1

Fuel System Lean During Acceleration

Rotor Sensor Fault

System Too Lean Banks 1 And 2 (Lean Fuel Fault)

Volkswagen throttle angle sensor 2 plausibility and shared supply checks

Rotor Control Fault

Jaguar AJ16 rich combustion across both cylinder groups

Throttle Actuation Potentiometer Signal 2 Signal Too Low

Rotor Calibration Fault

HO2S Bank 2 Sensor 1 Circuit Fixed Bank 2 Sensor 1

Throttle-drive angle sensor 2 reads too high

Bank 1 additive adaptation exceeds its supported range

Cam Sensor Fault

System Too Lean Banks 1 And 2 (Suspect HO2S)

Fuel Trim Bank 1 Different Injection Times

Bank 2 additive fuel adaptation reaches a limit

Cam Control Fault

System Too Rich Banks 1 And 2 (Suspect HO2S)

O2 Sensor Slow Response Bank 1

Cam Calibration Fault

Jaguar AJ16 lean adaptive fuel-flow correction

Rear Oxygen Sensor Correction

O2 Sensor Slow Response Bank 2

Synchronization Fault

Jaguar AJ16 rich adaptive fuel-flow correction

Oxygen Sensor Correction Behind Catalyst Bank 1 Limit Attained

O2 Sensor Signal Circuit Slow Switching From Rich to Lean Bank 1 Sensor 1

Jaguar AJ16 lean air-flow adaptation and idle evidence

Linear Oxygen Sensor Pump Current Open

O2 Sensor Signal Circuit Slow Switching From Rich to Lean Bank 2 Sensor 1

Jaguar AJ16 rich air-flow adaptation

Linear Oxygen Sensor Pump Current Short To Ground

O2 Sensor Signal Circuit Slow Switching From Rich to Lean Bank 1 Sensor 2

Ford natural-gas fuel delivery is inferred too low

Linear Oxygen Sensor Pump Current Short To B+

O2 Sensor Signal Circuit Slow Switching From Rich to Lean Bank 2 Sensor 2