P1165 BUICK – Cross Counts HO2S, Bank 2 Sensor 3

P1165 BUICK Possible Causes

  • Faulty O2 sensor heater, bank 2 sensor 3
  • Open or short circuit in bank 2 sensor 3 O2 sensor heater wiring
  • Poor electrical connection in O2 sensor heater circuit, bank 2

How to Fix P1165 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

  • Check Engine Light on (or soon-to-be-service engine warning light)

P1165 BUICK Meaning

HO2S heater control circuit high, bank 2 sensor 3 is the generic description for Buick P1165 code, but the manufacturer may have a different description for your specific vehicle model and year. Currently, we don’t have more information about Buick OBDII P1165 code.

P1165 CADILLAC – HO2S Cross Counts, Bank 2 Sensor 3

P1165 CADILLAC Possible Causes

  • Faulty O2 sensor heater, bank 2 sensor 3
  • O2 sensor heater bank 2 sensor 3 harness is open or shorted
  • O2 sensor heater circuit, bank 2, poor electrical connection
 

How to Fix Code P1165 CADILLAC?

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)
 

P1165 CADILLAC Meaning

HO2S cross counts, bank 2 sensor 3 is the generic description for code P1165 Cadillac, but the manufacturer may have a different description for your vehicle model and year. Currently, we do not have more information about OBDII code P1165 Cadillac.

P1165 CHEVROLET – Cross Counters HO2S, Row 2 Sensor 3

P1165 CHEVROLET Possible Causes

  • Faulty O2 sensor heater, bank 2 sensor 3
  • Bank 2 sensor 3 O2 sensor heater circuit is open or shorted
  • O2 sensor heater circuit, bank 2, poor electrical connection

How to Fix Code P1165 CHEVROLET?

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)

P1165 CHEVROLET Meaning

HO2S Heater Control Circuit Bank 2 Sensor 3 is the generic description for Chevrolet code P1165, but the manufacturer may have a different description for your vehicle model and year. Currently, we do not have additional information about Chevrolet OBDII code P1165.

P1165 GMC – HO2S Cross Counts, Bank 2 Sensor 3

P1165 GMC Possible Causes

  • Faulty O2 sensor heater, Bank 2 Sensor 3
  • Bank 2 Sensor 3 O2 sensor heater circuit is open or shorted
  • O2 sensor heater circuit, Bank 2, poor electrical connection
 

How to Fix GMC Code P1165?

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)
 

P1165 GMC Meaning

HO2S cross counts, Bank 2 Sensor 3 is the generic description for GMC code P1165, but the manufacturer may have a different description for your vehicle model and year. Currently, we do not have more information about OBDII code P1165 GMC.

P1165 HONDA – Air/Fuel Ratio Sensor 1 Circuit Range/Performance

P1165 HONDA Possible Causes

  • Air/Fuel Ratio Sensor 1 harness is open or shorted
  • Air/Fuel Ratio Sensor 1 circuit poor electrical connection
  • Faulty Air/Fuel Ratio Sensor 1

How to Fix Code P1165 HONDA?

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.

When is the Code Detected?

A malfunction is detected and the code is stored if the heater element is not activated or if the voltage at the Engine Control Module (ECM) terminals is a specified value or less for at least a specified period of time when power is supplied to the A/F sensor heater (Sensor 1).

Possible Symptoms

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

P1165 HONDA Meaning

The Air/Fuel Ratio (A/F) Sensor 1 is installed in the exhaust system and detects the oxygen concentration in the exhaust gases. The A/F sensor sends the output voltage to the Engine Control Module (ECM). A heating element for the sensor element is built into the A/F sensor (Sensor 1). It is activated and heats the sensor to stabilize and speed up the detection of oxygen concentration by controlling the current flowing through the heater. The current increase stabilizes when the voltage applied to the element electrode reaches a certain range because the amount of oxygen that is transported through the diffusion layer is limited. The current amperage is proportional to the oxygen concentration in the exhaust gases, so the air/fuel ratio is detected by measuring the current amperage. The ECM compares a preset target air/fuel ratio with the detected air/fuel ratio and controls the fuel injection timing.
If the A/F sensor (Sensor 1) voltage is low, the air/fuel ratio is lean and the ECM uses A/F feedback control to issue a Rich command. If the A/F sensor (Sensor 1) voltage is high, the air/fuel ratio is rich and the ECM uses A/F feedback control to issue a Lean command.

P1165 INFINITI – Turbulence Control Valve Control Vacuostat

Infiniti Code P1165: Definition, Causes, Symptoms, and Solutions

Meaning of Code P1165

Code P1165 on Infiniti vehicles indicates a problem with the Swirl Control Valve Vacuum Control Switch Circuit. This system optimizes airflow in the intake manifold to improve engine efficiency.

  • Operation:
  • The vacuum control switch detects the presence of vacuum sent to the swirl valve.
  • It sends an ON (vacuum detected) or OFF (no vacuum) signal to the ECM (Engine Control Module).
  • This system is primarily used for on-board diagnostics, not for active engine control.
  • Consequences: An incorrect signal can disrupt ECM diagnostics, although engine performance often remains normal.

Common Symptoms

  • 🟠 Check Engine Light illuminated (MIL) or warning message.
  • 🌀 Degraded swirl system operation (rarely noticeable during normal driving).

Possible Causes

  1. Mechanical Problems:
  • Clogged or cracked vacuum hose to the switch.
  • Vacuum control switch failure.
  1. Electrical Problems:
  • Open or short circuit in the solenoid valve wiring harness.
  • Faulty connection (corroded terminals, loose connector).
  • Faulty swirl control solenoid valve.
  1. Electronic Failure:
  • Faulty ECM (rare).

Diagnostic Procedures

Preliminary Steps

  1. Visual Inspection:
  • Check the vacuum hoses for obstructions, cracks, or disconnections.
  • Inspect the electrical connectors and wiring of the solenoid valve and switch (look for bent, corroded, or broken pins).
  1. Solenoid Valve Test:
  • Disconnect the solenoid valve and measure its resistance with a multimeter (typically between 10 and 30 Ω).
  • If the resistance is out of specification → Replace the solenoid valve.
  1. Vacuum Control Switch Test:
  • Use a manual vacuum pump to apply vacuum to the switch.
  • Check with a multimeter if the switch sends a consistent ON/OFF signal to the ECM.
  1. Electrical Circuit Test:
  • Check for continuity and the absence of short circuits in the wires connecting the solenoid valve and switch to the ECM.
  • Ensure the circuit power supply (+12V) and ground are intact.

Repair Solutions

  • 🔧 Replace the vacuum hose: If it is clogged or damaged.
  • 🔌 Repair the wiring: Replace damaged wires, clean oxidized connectors.
  • 🛠️ Replace the solenoid valve or switch: In case of confirmed failure.
  • 💻 Reset the ECM: Clear the code with an OBD2 scanner after repair.

Practical Tips

  • ⚠️ Safety: Disconnect the battery before handling electrical circuits.
  • 📚 Documentation: Consult the Infiniti service manual for technical specifications (resistance, wiring diagrams).
  • 🔄 Final Verification: After repair, test the system by driving to confirm the code does not reappear.

In Summary

Code P1165 on Infiniti indicates a malfunction in the vacuum control circuit related to the swirl valve. Although symptoms are often subtle, prompt repair is recommended to avoid future diagnostic issues.

  • Priorities: Inspect vacuum hoses, test the solenoid valve and switch.
  • Typical Solution: Replacement of faulty components (hose, solenoid valve, switch).
  • Expertise: If the code persists, consult a qualified technician to analyze the ECM or complex faults.

Ignoring this code can lead to future diagnostic errors or swirl system performance issues.

P1165 NISSAN – Turbulence Control Valve Control Vacuostat

P1165 NISSAN Possible Causes

  • Clogged hose to vacuum control switch
  • Swirl control valve control solenoid valve harness is open or shorted
  • Poor electrical connection in swirl control valve control solenoid valve circuit
  • Faulty swirl control valve control solenoid valve
  • Faulty swirl control valve control vacuum control switch

How to Fix Code P1165 NISSAN?

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 service engine soon warning light)

P1165 NISSAN Meaning

The swirl control valve control vacuum control switch detects the vacuum signal at the swirl control valve and sends an “ON” or “OFF” signal to the Engine Control Module (ECM).
When vacuum is supplied to the valve, the swirl control valve control vacuum control switch sends an “OFF” signal to the ECM. The swirl control valve control vacuum control switch is not used to control the engine system; it is used for on-board diagnostics.

P1165 VOLKSWAGEN – Bank 1 Long Term Fuel Trim Range 1 Rich Upper Limit Exceeded

Code P1165 VOLKSWAGEN

Possible Causes

Potential origins of code P1165 may include:

  • Fuel pressure too high (blocked return system or faulty pressure regulator).
  • Faulty fuel injector.
  • EVAP system purge solenoid stuck in open position.
  • Misfire in a cylinder.
  • Presence of other error codes to be corrected as a priority.

How to Fix Code P1165?

  1. Check possible causes:
    • Visually inspect the wiring harness and associated connectors for damage, broken, bent, pushed-in, or corroded pins.
    • Replace or repair any faulty components detected.
  2. Perform a thorough diagnosis:
    • Check fuel pressure and ensure it is within specified tolerances. If pressure is too high, inspect the regulator or return system.
    • Check fuel injectors for leaks or malfunctions.
    • Test the EVAP purge solenoid to see if it is stuck in the open position.
    • Identify misfires and correct them (spark plugs, coils, or injectors).
  3. Clear codes and perform a road test:
    After correcting the detected issues, clear the error codes using a diagnostic tool and perform a road test to confirm that code P1165 does not reappear.

Possible Symptoms

  • Illumination of the check engine light (CEL) or maintenance light.

Meaning of Code P1165 VOLKSWAGEN

Code P1165 indicates that Bank 1 Long Term Fuel Trim Range 1 has exceeded its rich limits. In simple terms, the engine is running with an excessively rich air/fuel mixture, which can lead to increased fuel consumption and higher emissions.

⚠️ Note: Descriptions may vary depending on your vehicle’s model and year. Consult the manufacturer’s manual for specific information.

P1166 – Malfunction in Heater Circuit of Air/Fuel Ratio Sensor 1

P1166 Possible Causes

  • Faulty air/fuel ratio sensor 1
  • Air/fuel ratio sensor 1 harness is open or shorted
  • Poor electrical connection in air/fuel ratio sensor 1 circuit

How to Fix Code P1166?

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?

A malfunction is detected and the code is stored if the heater element is not activated or if the voltage at the engine control module (ECM) terminals is a defined value or less for at least a specified period when power is supplied to the A/F sensor heater (sensor 1).

Possible Symptoms

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

P1166 Meaning

The air/fuel ratio (A/F) sensor 1 is installed in the exhaust system and detects the oxygen concentration in the exhaust gases. The A/F sensor sends the output voltage to the engine control module (ECM). A heating element for the sensor element is built into the A/F sensor (sensor 1). It is activated and heats the sensor to stabilize and speed up the detection of oxygen concentration by controlling the current flowing through the heater. The current increase stabilizes when the voltage applied to the element electrode reaches a certain range because the amount of oxygen that passes through the diffusion layer is limited. The current amperage is proportional to the oxygen concentration in the exhaust gases, so the air/fuel ratio is detected by measuring the current amperage. The ECM compares a defined target air/fuel ratio with the detected air/fuel ratio and controls the fuel injection timing.
If the A/F sensor (sensor 1) voltage is low, the air/fuel ratio is lean and the ECM uses A/F feedback control to issue a Rich command. If the A/F sensor (sensor 1) voltage is high, the air/fuel ratio is rich and the ECM uses A/F feedback control to issue a Lean command.

P1166 1996 HONDA CIVIC – Malfunction in Air/Fuel Ratio Sensor Heater Circuit 1

P1166 1996 HONDA CIVIC Possible Causes

  • Faulty Air/Fuel Ratio Sensor 1
  • Air/Fuel Ratio Sensor 1 harness is open or shorted
  • Poor electrical connection in Air/Fuel Ratio Sensor 1 circuit

How to Fix Code P1166 1996 HONDA CIVIC?

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?

If the element is not activated or if the voltage at the Engine Control Module (ECM) terminals is a defined value or less for at least a defined period of time when power is supplied to the A/F sensor heater (sensor 1), a malfunction is detected and the code is stored.

Possible Symptoms

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

P1166 1996 HONDA CIVIC Meaning

The Air/Fuel Ratio (A/F) Sensor 1 is installed in the exhaust system and detects the oxygen content in the exhaust gases. The A/F sensor sends the output voltage to the Engine Control Module (ECM). A heating element for the sensor element is built into the A/F sensor (sensor 1). It is activated and heats the sensor to stabilize and speed up the detection of oxygen content by controlling the current flowing through the heater. The current increase stabilizes when the voltage applied to the element electrode reaches a certain range because the amount of oxygen that is routed through the diffusion layer is limited. The current amperage is proportional to the oxygen content in the exhaust gases, so the air/fuel ratio is detected by measuring the current amperage. The ECM compares a defined target air/fuel ratio with the detected air/fuel ratio and controls the fuel injection timing.
If the A/F sensor (sensor 1) voltage is low, the air/fuel ratio is lean and the ECM uses A/F feedback control to issue a Rich command. If the A/F sensor (sensor 1) voltage is high, the air/fuel ratio is rich and the ECM uses A/F feedback control to issue a Lean command.