Code P1288 GMC – High Voltage in Accelerator Pedal Position Sensor Circuit 3

P1288 Code GMC Possible Causes

  • Faulty Accelerator Pedal Position (APP)
  • Accelerator Pedal Position harness is open or shorted
  • Poor electrical connection in the Accelerator Pedal Position circuit

| How is GMC Code P1288 Repaired?

Start by checking the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

| What are the Possible Symptoms of GMC Code P1288?

  • Engine Light ON (or Service Engine Soon Warning Light)

| What Does GMC Code P1288 Mean?

The Accelerator Pedal Position (APP) sensors are located in the Throttle Actuator Control (TAC) module assembly. The TAC module assembly is mounted on the accelerator pedal bracket. There are 3 individual APP sensors in the TAC module. Three separate signal circuits, low reference circuits, and 5-volt reference circuits are used to determine the accelerator pedal position. The APP sensor signal voltages increase as the accelerator pedal is depressed.

Code P1288 HONDA – Low voltage in the rocker arm oil pressure switch circuit

P1288 Code HONDA Possible Causes

  • Faulty rocker arm oil pressure switch
  • Rocker arm oil pressure switch harness is open or shorted
  • Poor electrical connection in rocker arm oil pressure switch circuit

| How is HONDA P1288 Code Repair Done?

Start by checking the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

| What are the Possible Symptoms of HONDA P1288 Code?

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

| What Does HONDA P1288 Code Mean?

Rocker Arm Oil Pressure Switch Circuit Low Voltage is the generic description for Honda P1288 code, but the manufacturer may have a different description for your vehicle model and year. Currently, we have no further information about Honda P1288 OBDII code.

P1288 INFINITI Code – Air Fuel Ratio Sensor 1 Slow Response Circuit Bank 2

 

 

📌 Meaning of INFINITI Code P1288

Code P1288 is triggered when the ECM (Engine Control Module) detects that the response from the Air/Fuel (A/F) Ratio Sensor #1, Bank 2 is too slow to switch from a rich mixture to a lean mixture.

This “wideband” type sensor accurately measures the air/fuel ratio, not only at λ = 1 (stoichiometric mixture), but also in rich and lean ranges. It uses an oxygen pumping system to regulate gases in a diffusion chamber and provide a precise signal to the PCM.

⚠️ Possible Symptoms

  • 🔥 Check Engine Light On

  • ⛽ Rough Idle or unstable idle

  • 🌬️ Abnormal Fuel Consumption

  • 🐢 Slight Loss of Performance

📍 Possible Causes of INFINITI Code P1288

  • ❌ Faulty A/F Sensor (Bank 2, Sensor 1)

  • 🔌 Damaged Sensor Wiring Harness or Connector

  • ⚡ Faulty Electrical Connection (bent pin, corrosion, etc.)

  • 🛠️ Fuel Pressure Too Low

  • 💨 Intake Air Leak or Exhaust Leak

  • 💉 Faulty Fuel Injector

  • ⚙️ Faulty Mass Air Flow (MAF) Sensor

  • 🔁 Faulty PCV (Positive Crankcase Ventilation) Valve

🔍 When is Code P1288 Detected?

The ECM expects a fast response from the A/F sensor after startup or acceleration. If the signal takes too long to indicate a switch from rich to lean, it triggers DTC P1288.

🧰 How to Fix Code P1288?

  1. Visual Inspection:

    • Check the condition of the A/F sensor wiring (Bank 2, Sensor 1)

    • Look for bent, corroded, or broken pins

  2. Test the A/F Sensor:

    • Use an OBD2 diagnostic tool to read the sensor’s real-time values

    • Check if it reacts to accelerations/decelerations

  3. Check for Leaks:

    • Air leak in the intake hoses

    • Exhaust leak before the sensor

  4. Check Fuel Pressure

    • Pressure that is too low can distort the air/fuel ratio

  5. Test the Fuel Injector and PCV Valve

    • Ensure they are functioning correctly

  6. Replace the A/F Sensor if all checks are good but the code persists

💡 Pro Tip

The A/F sensor operates at very high temperatures (700-800°C). If the sensor’s internal heater is faulty, the sensor will take longer to reach its operating temperature, which can also trigger this code. This point is often overlooked during diagnosis.

Jeep Code P1288 – Short Circuit Valve Circuit Status

P1288 Code JEEP Possible Causes

  • Faulty short runner valve
  • Short Runner Valve harness is open or shorted
  • Poor electrical connection in the short runner valve circuit

| How is the JEEP P1288 code repair performed?

Start by checking the “Possible Causes” listed above. Visually inspect the wiring harness and associated connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

| JEEP P1288 Code Technical Notes

Wide open throttle condition – the short runner valve is not in the commanded state

| What are the possible symptoms of JEEP P1288 code?

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

| What does JEEP P1288 code mean?

The short runner valve circuit status is the generic description for Jeep P1288 code, but the manufacturer may have a different description for your vehicle model and year. Currently, we do not have additional information about the Jeep P1288 OBDII code.

P1288 Code LINCOLN – Cylinder Head Temperature Sensor Out of Self-Test Range

P1288 Code LINCOLN Possible Causes

  • Faulty thermostat
  • Overheated engine
  • Low coolant level
  • Defective cylinder head temperature (CHT) sensor
  • Cylinder head temperature sensor wiring harness is open or shorted
  • Poor electrical connection in the cylinder head temperature sensor circuit

| How is the P1288 LINCOLN Code Repaired?

Start by checking the “Possible Causes” listed above. Visually inspect the wiring harness and associated connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

| Technical Notes on P1288 LINCOLN Code

This indicates that the cylinder head temperature (CHT) sensor is out of the self-test range. The engine is not at normal operating temperature.

| When is the P1288 LINCOLN Code Detected?

The P1288 code is set if the engine reaches a critical temperature.

| What are the Possible Symptoms of P1288 LINCOLN Code?

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

| What Does P1288 LINCOLN Code Mean?

The cylinder head temperature (CHT) sensor is mounted in the cylinder head wall and is not connected to any coolant passages. The CHT sends a signal to the powertrain control module (PCM) indicating the cylinder head temperature. If the temperature exceeds 126°C (258°F), the PCM shuts off four fuel injectors at a time. The PCM will alternate the four disabled injectors every 32 engine cycles. The four cylinders that are not injected with fuel act as air pumps to help cool the engine. If the temperature exceeds 154°C (310°F), the PCM shuts off all fuel injectors until the engine temperature drops below 154°C (310°F).

P1288 Code MAZDA – Cylinder Head Temperature Sensor Out of Self-Test Range

P1288 MAZDA Code Possible Causes

  • Faulty thermostat
  • Not within operating range
  • Engine overheated
  • Low coolant level
  • Defective cylinder head temperature (CHT) sensor
  • Cylinder head temperature sensor wiring open or shorted
  • Poor electrical connection in the cylinder head temperature sensor circuit

| How is the P1288 MAZDA Code Repaired?

Start by checking the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

|P1288 MAZDA Code Tech Notes

This indicates that the cylinder head temperature (CHT) sensor is out of the self-test range. The engine is not at normal operating temperature.

| When is the P1288 MAZDA Code Detected?

The P1288 code is set if the engine reaches a critical temperature.

| What are the Possible Symptoms of the MAZDA P1288 Code?

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

| What Does the P1288 MAZDA Code Mean?

The cylinder head temperature (CHT) sensor is mounted in the cylinder head wall and is not connected to any coolant passages. The CHT sends a signal to the Powertrain Control Module (PCM) indicating the cylinder head temperature. If the temperature exceeds 126°C (258°F), the PCM shuts off four fuel injectors at a time. The PCM will alternate the four disabled injectors every 32 engine cycles. The four cylinders that are not injected with fuel act as air pumps to help cool the engine. If the temperature exceeds 154°C (310°F), the PCM shuts off all fuel injectors until the engine temperature drops below 154°C (310°F).

P1288 Code MERCURY – Cylinder Head Temperature Sensor Out of Self-Test Range

P1288 Code MERCURY Possible Causes

  • Faulty thermostat
  • Overheated engine
  • Low coolant level
  • Defective cylinder head temperature (CHT) sensor
  • Cylinder head temperature sensor wiring is open or shorted
  • Poor electrical connection in the cylinder head temperature sensor circuit

| How is the P1288 MERCURY code repair performed?

Start by checking the “Possible Causes” listed above. Visually inspect the wiring harness and associated connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

| P1288 MERCURY Code Technical Notes

This indicates that the cylinder head temperature (CHT) sensor is out of the self-test range. The engine is not at normal operating temperature.

| When is the P1288 MERCURY code detected?

The P1288 code is set if the engine reaches a critical temperature.

| What are the possible symptoms of the P1288 MERCURY code?

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

| What does the P1288 MERCURY code mean?

The cylinder head temperature (CHT) sensor is mounted in the cylinder head wall and is not connected to any coolant passages. The CHT sends a signal to the powertrain control module (PCM) indicating the cylinder head temperature. If the temperature exceeds 126°C (258°F), the PCM shuts off four fuel injectors at a time. The PCM will alternate the four disabled injectors every 32 engine cycles. The four cylinders that are not injected with fuel act as air pumps to help cool the engine. If the temperature exceeds 154°C (310°F), the PCM shuts off all fuel injectors until the engine temperature drops below 154°C (310°F).

P1288 Code NISSAN – Air Fuel Ratio Sensor 1 Slow Response Circuit Bank 2

P1288 Code NISSAN Possible Causes

  • Faulty Air-Fuel Ratio (A/F) Sensor 1, Bank 2
  • Air-Fuel Ratio (A/F) Sensor 1 Bank 2 harness is open or shorted
  • Air-Fuel Ratio (A/F) Sensor 1 Bank 2 circuit poor electrical connection
  • Low fuel pressure
  • Faulty fuel injector
  • Intake air leaks
  • Exhaust gas leaks
  • Faulty PCV
  • Faulty mass air flow meter

| How is P1288 Code NISSAN repaired?

Start by checking the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

| When is the P1288 Code NISSAN detected?

The response (from RICH to LEAN) of the A/F signal calculated by the ECM from the A/F sensor 1 signal takes longer than the specified time.

| What are the possible symptoms of NISSAN P1288 code?

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Possible rough engine idle

| What does the P1288 Code NISSAN mean?

The A/F sensor is a dual-cell planar limit current sensor. The sensor element of the A/F sensor is the combination of a Nernst concentration cell (sensor cell) with an oxygen pump cell, which transports ions. It has a heater in the element.

The sensor is capable of precisely measuring λ=1, but also in the lean and rich range. With its control electronics, the sensor delivers a clear and continuous signal over a wide λ range (0.7 < λ < air).
The exhaust gas components diffuse through the diffusion gap at the oxygen pump electrode and the Nernst concentration cell, where they are brought to thermodynamic equilibrium.
An electronic circuit controls the pump current through the oxygen pump cell so that the composition of the exhaust gas in the diffusion gap remains constant at λ = 1. Therefore, the A/F sensor is capable of indicating the air/fuel ratio by this pumping current. In addition, a heater is built into the sensor to ensure the required operating temperature of 700 to 800 C (1,292 to 1,472 F).

P1288 VOLKSWAGEN Code – Turbocharger Bypass Valve Short to B+

P1288 VOLKSWAGEN code possible causes

  • Faulty turbocharger bypass valve
  • Turbocharger bypass valve harness is open or shorted
  • Poor electrical connection in the turbocharger bypass valve circuit

| How is the P1288 VOLKSWAGEN code repair performed?

Start by checking the “Possible Causes” listed above. Visually inspect the wiring harness and associated connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

| What are the possible symptoms of P1288 VOLKSWAGEN code?

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

| What does P1288 VOLKSWAGEN code mean?

Turbocharger bypass valve short to B+ is the generic description for Volkswagen P1288 code, but the manufacturer may have a different description for your vehicle model and year. Currently, we have no further information about the Volkswagen P1288 OBDII code.

Code P1289 – Upper Cylinder Head Temperature Sensor Signal Above Self-Test Range

P1289 code possible causes

  • Faulty thermostat
  • Overheated engine
  • Low coolant level
  • Faulty cylinder head temperature (CHT) sensor
  • Cylinder head temperature (CHT) sensor harness is open or shorted
  • Poor electrical connection in cylinder head temperature (CHT) sensor circuit

| How is P1289 code repair performed?

Start by checking the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

| What are the possible symptoms of P1289 code?

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

| What does P1289 code mean?

The cylinder head temperature (CHT) sensor is mounted in the cylinder head wall and is not connected to any coolant passages. The CHT sends a signal to the powertrain control module (PCM) indicating the cylinder head temperature. If the temperature exceeds 126°C (258°F), the PCM shuts off four fuel injectors at a time. The PCM will alternate the four disabled injectors every 32 engine cycles. The four cylinders that are not injected with fuel act as air pumps to help cool the engine. If the temperature exceeds 154°C (310°F), the PCM shuts off all fuel injectors until the engine temperature drops below 154°C (310°F).