P1151 Mercury – Upstream Heated Oxygen Sensor Switch Sensor Indicates Lean Bank 2

P1151 MERCURY Possible Causes

  • Faulty upstream oxygen sensor, bank 2
  • High or low fuel pressure
  • Dirty/faulty MAF sensor
  • Engine vacuum leak
  • Leaking fuel injector or fuel pressure regulator
  • Faulty Powertrain Control Module (PCM)

How to Fix P1151 MERCURY Code?

Start by checking the “possible causes” listed above. Visually inspect the related wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.

Technical Notes

This code means the Powertrain Control Module (PCM) has detected a lean system, meaning there is either not enough fuel or an excessive amount of air in the system. Start by checking for vacuum leaks.

When is the Code Detected?

When an HO2S sensor indicates lean at the end of a test, the system attempts to correct an over-lean condition. The code is set when the fuel control system no longer detects switching for a calibrated duration.

Possible Symptoms

  • Check Engine Light on (or Service Engine Soon warning light)

P1151 MERCURY Meaning

The Heated Oxygen Sensor (HO2S) Monitor is an on-board strategy designed to monitor the HO2S sensors for any malfunction or deterioration that could affect emissions. Under specific conditions, the upstream fuel control or HO2S sensors are checked for proper output voltage and response rate (the time it takes to switch from lean to rich or rich to lean). The downstream HO2S sensors used for Catalyst Monitor are also monitored for proper output voltage. Input is required from engine coolant temperature (ECT) or cylinder head temperature (CHT), intake air temperature (IAT), mass air flow (MAF), throttle position (TP), and crankshaft position (CKP) to activate the HO2S Monitor. The Fuel System Monitor and Misfire Detection Monitor must also have completed successfully before the HO2S Monitor is activated.
• The HO2S sensor detects the oxygen content in the exhaust stream and delivers a voltage between zero and 1.0 volt. At stoichiometric lean (air/fuel ratio of about 14.7:1 for gasoline engines), the HO2S will generate a voltage between zero and 0.45 volt. At stoichiometric rich, the HO2S will generate a voltage between 0.45 and 1.0 volt.
• The HO2S Monitor evaluates both the upstream (fuel control) and downstream (catalyst monitor) HO2S for proper operation.
• Once the HO2S Monitor is activated, the amplitude of the upstream HO2S signal voltage and the response frequency are checked. Excessive voltage is determined by comparing the HO2S signal voltage to a maximum threshold voltage that can be calibrated.
• A fixed-frequency closed-loop fuel control routine is executed, and the upstream HO2S voltage amplitude and output response frequency are observed. A sample of the upstream HO2S signal is evaluated to determine if the sensor is capable of switching or has a slow response rate.
• An HO2S heater circuit fault is determined by turning the heater on and off and looking for a corresponding change in the OSM and
measuring the current through the heater circuit.
• The MIL is activated after a fault is detected on two consecutive OBD II drive cycles.

P1151 MINI – Intermittent O2 Sensor Heater Circuit Signal, Bank 2 Sensor 1

P1151 MINI Possible Causes

  • Faulty O2 sensor heater, bank 2 sensor 1
  • O2 sensor heater, bank 2 Sensor 1 harness is open or shorted
  • O2 sensor heater circuit, bank 2 Sensor 1 circuit poor electrical connection
 

How to Fix P1151 MINI Code?

Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.

 
 

Possible Symptoms

  • Engine light on (or service engine soon warning light)
 

P1151 MINI Meaning

Intermittent signal in the O2 sensor heater circuit, sensor 1 of bank 2 is the generic description for the P1151 Mini code, but the manufacturer may have a different description for your vehicle model and year. Currently, we do not have more information about the P1151 Mini OBDII code.

P1151 SUBARU – High Input of Rear Oxygen Sensor Heater Circuit

P1151 SUBARU Possible Causes

  • Faulty rear oxygen sensor
  • Rear oxygen sensor harness is open or shorted
  • Poor electrical connection in rear oxygen sensor circuit

How to Fix P1151 SUBARU Code?

Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

  • Engine light on (or service engine soon warning light)

P1151 SUBARU Meaning

The rear oxygen sensor heater circuit high input is the generic description for Subaru P1151 code, but the manufacturer may have a different description for your vehicle model and year. Currently, we don’t have more information about Subaru OBDII P1151 code.

P1151 SUZUKI – Low Voltage Shift of HO2S21 Circuit

P1151 SUZUKI Possible Causes

  • Faulty rear oxygen sensor
  • Rear oxygen sensor harness is open or shorted
  • Poor electrical connection in rear oxygen sensor circuit

How to Fix Code P1151 SUZUKI?

Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

  • Engine light on (or service engine soon warning light)

P1151 SUZUKI Meaning

HO2S21 Circuit Low Voltage Shift / High Voltage Shift / Circuit Continuity / High Voltage is the generic description for Suzuki code P1151, but the manufacturer may have a different description for your vehicle model and year. Currently, we do not have more information about Suzuki OBDII code P1151.

P1151 VOLKSWAGEN – Bank 1 Long Term Fuel Trim 1 Lower Lean Limit Exceeded

P1151 VOLKSWAGEN Possible Causes

  • Low fuel pressure or volume
  • Check engine for vacuum leaks
  • Clogged or faulty fuel injector(s)
  • Mass Air Flow (MAF) sensor failure

How to Fix Volkswagen P1151 Code?

Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

  • Engine light on (or engine warning light soon service)

P1151 VOLKSWAGEN Meaning

Bank 1 Long Term Fuel Trim Range 1 Lean Lower Limit Exceeded is the generic description for Volkswagen code P1151, but the manufacturer may have a different description for your vehicle model and year. Currently, we do not have additional information about Volkswagen OBDII code P1151.

P1152 – Lack of Heated Oxygen Sensor Switch Sensor Indicates Bank 2 Rich

P1152 Possible Causes

  • Faulty upstream oxygen sensor, bank 2
  • High or low fuel pressure
  • Dirty/faulty MAF sensor
  • Engine vacuum leak
  • Leaking fuel injector or fuel pressure regulator
  • Faulty Powertrain Control Module (PCM)

How to Fix Code P1152?

Start by checking the “possible causes” listed above. Visually inspect the related wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

  • Engine light on (or engine service warning light soon)

P1152 Meaning

The Heated Oxygen Sensor (HO2S) Monitor is an on-board strategy designed to monitor the HO2S sensors for any malfunction or deterioration that could affect emissions. Under specific conditions, the fuel control or upstream HO2S sensors are checked for proper output voltage and response rate (the time it takes to switch from lean to rich or rich to lean). The downstream HO2S sensors used for Catalyst Monitor are also monitored for proper output voltage. Input is required from engine coolant temperature (ECT) or cylinder head temperature (CHT), intake air temperature (IAT), mass air flow (MAF), throttle position (TP), and crankshaft position (CKP) to activate the HO2S Monitor. The Fuel System Monitor and Misfire Detection Monitor must also have completed successfully before the HO2S Monitor is activated.
• The HO2S detects the oxygen content in the exhaust stream and delivers a voltage between zero and 1.0 volt. At lean stoichiometry (air/fuel ratio of about 14.7:1 for gasoline engines), the HO2S will generate a voltage between zero and 0.45 volt. At rich stoichiometry, the HO2S will generate a voltage between 0.45 and 1.0 volt.
• The HO2S Monitor evaluates both the upstream (fuel control) and downstream (catalyst monitor) HO2S for proper operation.
• Once the HO2S Monitor is activated, the amplitude of the upstream HO2S signal voltage and the response frequency are checked. Excessive voltage is determined by comparing the HO2S signal voltage to a maximum threshold voltage that can be calibrated.
• A fixed-frequency closed-loop fuel control routine is executed, and the upstream HO2S voltage amplitude and output response frequency are observed. A sample of the upstream HO2S signal is evaluated to determine if the sensor is capable of switching or has a slow response rate.
• An HO2S heater circuit fault is determined by turning the heater on and off and looking for a corresponding change in the OSM and
measuring the current through the heater circuit.
• The MIL is activated after a fault is detected on two consecutive OBD II drive cycles.

P1152 FORD F150 – Upstream Heated Oxygen Sensor Switch Sensor Lack Indicates Rich Bank 2

P1152 1997 FORD F150 Possible Causes

  • Faulty upstream oxygen sensor, bank 2
  • High or low fuel pressure
  • Dirty/faulty MAF sensor
  • Engine vacuum leak
  • Leaking fuel injector or fuel pressure regulator
  • Faulty powertrain control module (PCM)

How to Fix Code P1152 1997 FORD F150?

Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

  • Engine light on (or engine service warning light soon)

P1152 1997 FORD F150 Meaning

The Heated Oxygen Sensor (HO2S) monitor is an onboard strategy designed to monitor the HO2S sensors for any malfunction or deterioration that could affect emissions. Under specific conditions, the upstream fuel control or HO2S sensors are checked for proper output voltage and response rate (the time it takes to switch from lean to rich or rich to lean). The downstream HO2S sensors used for Catalyst Monitor are also monitored for proper output voltage. An input is required from engine coolant temperature (ECT) or cylinder head temperature (CHT), intake air temperature (IAT), mass air flow (MAF), throttle position (TP), and crankshaft position (CKP) to activate the HO2S monitor. The fuel system monitor and misfire detection monitor must also have completed successfully before the HO2S monitor is activated.
• The HO2S sensor detects the oxygen content in the exhaust stream and delivers a voltage between zero and 1.0 volt. At lean stoichiometry (air/fuel ratio of about 14.7:1 for gasoline engines), the HO2S will generate a voltage between zero and 0.45 volt. At rich stoichiometry, the HO2S will generate a voltage between 0.45 and 1.0 volt.
• The HO2S monitor evaluates both the upstream (fuel control) and downstream (catalyst monitor) HO2S for proper operation.
• Once the HO2S monitor is activated, the upstream HO2S signal voltage amplitude and response frequency are checked. Excessive voltage is determined by comparing the HO2S signal voltage to a maximum threshold voltage that can be calibrated.
• A fixed-frequency closed-loop fuel control routine is executed, and the upstream HO2S voltage amplitude and output response frequency are observed. A sample of the upstream HO2S signal is evaluated to determine if the sensor is capable of switching or has a slow response rate.
• An HO2S heater circuit fault is determined by turning the heater on and off and looking for a corresponding change in the OSM and
measuring the current through the heater circuit.
• The MIL is activated after a fault is detected on two consecutive OBD II drive cycles.

P1152 AUDI – Bank 1 Long Term Fuel Trim Range 2 Lean Lower Limit Exceeded

P1152 AUDI Possible Causes

  • Low fuel pressure or volume
  • Check engine for vacuum leaks
  • Clogged or faulty fuel injector(s)
  • Mass Air Flow (MAF) sensor failure

How to Fix P1152 AUDI Code?

Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

  • Engine light on (or engine service warning light soon)

P1152 AUDI Meaning

Bank 1 Fuel Trim Long Term Range 2 Lean Lower Limit Exceeded is the generic description for Audi P1152 code, but the manufacturer may have a different description for your specific model and vehicle year. Currently, we don’t have more information about the Audi P1152 OBDII code.

P1152 BMW – Low Voltage in O2 Sensor Heater Circuit, Bank 2 Sensor 1

P1152 BMW Possible Causes

  • Faulty O2 sensor heater, bank 2 sensor 1
  • O2 sensor heater, bank 2 Sensor 1 harness is open or shorted
  • O2 sensor heater circuit, bank 2 Sensor 1 circuit poor electrical connection
 

How to Fix BMW Code P1152?

Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.

 
 

Possible Symptoms

  • Engine light on (or service engine soon warning light)
 

P1152 BMW Meaning

Low voltage in O2 sensor heater circuit, bank 2 sensor 1 is the generic description for Bmw P1152 code, but the manufacturer may have a different description for your vehicle model and year. Currently, we do not have more information about the P1152 Bmw OBDII code.

P1152 CHRYSLER – Fuel Rail Pressure Malfunction

P1152 CHRYSLER – Fuel Rail Pressure Malfunction Positive Deviation Fuel Pressure Solenoid Setpoint

P1152 CHRYSLER Possible Causes

  • Fuel supply system failure condition
  • Faulty fuel pressure solenoid
  • Air in the fuel system

How to Fix P1152 CHRYSLER Code?

Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

  • Engine light on (or engine service warning light soon)

P1152 CHRYSLER Meaning

The Engine Control Module (ECM) has determined that the fuel rail pressure is too high for a specific condition.