P1143 INFINITI – Heated Oxygen Sensor 1 Lean Shift Monitor, Bank 1

P1143 INFINITI Possible Causes

  • Faulty heated oxygen sensor, bank 1, sensor 1
  • Intake air leaks
  • Open or short circuit in the heated oxygen sensor bank 1, sensor 1 harness
  • Poor electrical connection in the heated oxygen sensor bank 1, sensor 1 circuit
  • Fuel pressure
  • Injectors

How to Fix P1143 INFINITI 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.

Technical Notes

If there is no intake air leak, the most likely cause of the P1143 code is the front oxygen sensor bank 1.

When is the Code Detected?

The sensor’s maximum and minimum voltages are not reached at the specified voltages.

Possible Symptoms

  • Check Engine Light on (or Service Engine Soon Warning Light)

P1143 INFINITI Meaning

The heated oxygen sensor 1 is placed in the front pipe. It detects the amount of oxygen in the exhaust gases compared to the outside air. The heated oxygen sensor 1 has a closed-end zirconia ceramic tube. Zirconia generates a voltage from about 1 V under richer conditions to 0 V under leaner conditions. The heated oxygen sensor 1 signal is sent to the Engine Control Module (ECM). The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the steep change from 1V to 0V.

P1143 JEEP – Fuel Rail Pressure Malfunction Positive Pressure Deviation

P1143 JEEP Possible Causes

  • Poor fuel pressure
  • Faulty fuel rail pressure solenoid
  • Fuel rail pressure solenoid harness is open or shorted
  • Poor electrical connection in the fuel rail pressure solenoid circuit
  • Air in the fuel system

How to Fix JEEP Code P1143?

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.

When is the Code Detected?

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

Possible Symptoms

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

P1143 JEEP Meaning

Fuel Rail Pressure Malfunction – Positive Pressure Deviation is the generic description for Jeep code P1143, but the manufacturer may have a different description for your vehicle model and year. Currently, we do not have further information on the OBDII Jeep P1143 code.

P1143 NISSAN – Heated Oxygen Sensor 1 Lean Shift Monitoring, Bank 1

P1143 NISSAN Possible Causes

  • Faulty heated oxygen sensor, bank 1
  • Intake air leaks
  • Open or short circuit in the bank 1 heated oxygen sensor harness
  • Poor electrical connection in the heated oxygen sensor circuit, bank 1
  • Fuel pressure
  • Injectors

How to Fix Code P1143 NISSAN?

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.

Technical Notes

If there is no intake air leak, the most likely cause of code P1143 is the front O2 sensor bank 1.

When is the Code Detected?

The maximum and minimum sensor voltages are not reached at the specified voltages.

Possible Symptoms

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

P1143 NISSAN Meaning

The heated oxygen sensor 1 is placed in the front tube. It detects the amount of oxygen in the exhaust gases compared to the outside air. The heated oxygen sensor 1 has a closed-end zirconia ceramic tube. Zirconia generates a voltage of about 1 V under richer conditions to 0 V under leaner conditions. The heated oxygen sensor 1 signal is sent to the engine control module (ECM). The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the sharp change from 1V to 0V.

P1143 SUBARU – Low Input from Pressure Sensor Circuit

P1143 SUBARU Possible Causes

  • Faulty pressure sensor
  • Pressure sensor harness is open or shorted
  • Poor electrical connection in the pressure sensor circuit

How to Fix P1143 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

  • Check Engine Light on (or Service Engine Soon Warning Light)

P1143 SUBARU Meaning

The low input of the pressure sensor circuit is the generic description for Subaru P1143 code, but the manufacturer may have a different description for your vehicle model and year. Currently, we don’t have additional information about the Subaru P1143 OBDII code.

P1143 VOLKSWAGEN – Upper Limit of Cross Check for Load Calculation Exceeded

P1143 VOLKSWAGEN Possible Causes

  • Faulty mass air flow (MAF) sensor
  • Vacuum leaks
  • Throttle system errors
 

How to Fix Volkswagen P1143 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

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

P1143 VOLKSWAGEN Meaning

Load Calculation Cross Check Upper Limit Exceeded is the generic description for Volkswagen P1143 code, but the manufacturer may have a different description for your vehicle model and year. Currently, we have no further information about Volkswagen OBDII P1143 code.

P1144 – Malfunction in Air Assist Control Valve Circuit

P1144 Possible Causes

  • Faulty heated oxygen sensor upstream, bank 1
  • Open or short circuit in the upstream heated oxygen sensor bank 1 wiring harness
  • Poor electrical connection in the upstream heated oxygen sensor bank 1 circuit
  • Inappropriate fuel pressure
  • Faulty fuel injectors
  • Intake air leaks may be defective
  • Exhaust gas leaks

How is P1144 Code Repaired?

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)

P1144 Meaning

The upstream heated oxygen sensor (or O2 sensor 1) is placed in the exhaust manifold. It detects the amount of oxygen in the exhaust gases compared to the outside air. Heated oxygen sensor 1 has a closed-end zirconia ceramic tube. Zirconia generates a voltage from about 1V in richer conditions to 0V in leaner conditions. The signal from heated oxygen sensor 1 is sent to the engine control module (ECM). The ECM adjusts the fuel injection pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the sharp change from 1V to 0V.

P1144 2002 NISSAN ALTIMA SEDAN – Heated Oxygen Sensor 1 Shift Rich Monitor

P1144 2002 NISSAN ALTIMA SEDAN Possible Causes

  • Faulty heated front oxygen sensor, bank 1
  • Open or short circuit in the heated front oxygen sensor bank 1 wiring harness
  • Poor electrical connection in the heated front oxygen sensor circuit, bank 1
  • Inappropriate fuel pressure
  • Faulty fuel injectors
  • Intake air leaks may be faulty
  • Exhaust gas leaks

How to Fix Code P1144 2002 NISSAN ALTIMA SEDAN?

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.

Technical Notes

Replacing the O2 sensor 1, bank 1, usually resolves the issue.

When is the Code Detected?

An excessively high sensor voltage is sent to the Engine Control Module (ECM).

Possible Symptoms

  • Engine light on (or engine warning light soon to be on)
  • High fuel consumption
  • Excessive exhaust smoke

P1144 2002 NISSAN ALTIMA SEDAN Meaning

The heated front oxygen sensor (or O2 sensor 1) is placed in the exhaust manifold. It detects the amount of oxygen in the exhaust gases compared to the outside air. The heated oxygen sensor 1 has a closed-end zirconia ceramic tube. Zirconia generates a voltage of about 1 V under rich conditions to 0 V under lean conditions. The signal from the heated oxygen sensor 1 is sent to the Engine Control Module (ECM). The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the sharp change from 1V to 0V.

P1144 2003 INFINITI G35 – Heated Oxygen Sensor 1 Rich Monitoring

P1144 2003 INFINITI G35 Possible Causes

  • Faulty Heated Oxygen Sensor Front, Bank 1
  • Open or short circuit in the Bank 1 Heated Oxygen Sensor Front harness
  • Poor electrical connection in the Heated Oxygen Sensor Front circuit, Bank 1
  • Inappropriate fuel pressure
  • Faulty fuel injectors
  • Intake air leaks may be faulty
  • Exhaust gas leaks

How to Fix Code P1144 2003 INFINITI G35?

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.

Technical Notes

Replacing the O2 Sensor 1, Bank 1, usually resolves the issue.

When is the Code Detected?

An excessively high sensor voltage is sent to the Engine Control Module (ECM).

Possible Symptoms

  • Engine light on (or service engine soon warning light)
  • High fuel consumption
  • Excessive exhaust smoke

P1144 2003 INFINITI G35 Meaning

The Heated Oxygen Sensor Front (or O2 Sensor 1) is placed in the exhaust manifold. It detects the amount of oxygen in the exhaust gases compared to the outside air. The Heated Oxygen Sensor 1 has a closed-end zirconia ceramic tube. Zirconia generates a voltage from about 1 V under richer conditions to 0 V under leaner conditions. The signal from the Heated Oxygen Sensor 1 is sent to the Engine Control Module (ECM). The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the sharp change from 1V to 0V.

P1144 AUDI – Mass Air Flow Sensor Open / Short to Ground

P1144 AUDI Possible Causes

  • Faulty mass air flow (MAF) sensor
  • Vacuum leaks
  • Throttle system errors
 

How to fix P1144 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

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

P1144 AUDI Meaning

Mass air flow sensor open/short to ground is the generic description for Audi P1144 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 P1144 OBDII code.

P1144 BUICK – HO2S Bank 1 Sensor 3 Rich or High Voltage

P1144 BUICK Possible Causes

  • Faulty HO2S Bank 1 Sensor 3
  • Open or short circuit in HO2S Bank 1 Sensor 3 wiring harness
  • Poor electrical connection in HO2S Bank 1 Sensor 3 circuit

How to Fix P1144 BUICK 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)

P1144 BUICK Meaning

HO2S Bank 1 Sensor 3 rich or high voltage is the generic description for Buick P1144 code, but the manufacturer may have a different description for your vehicle model and year. Currently, we do not have more information about the OBDII P1144 Buick code.