P1238 VOLVO – Turbocharger Control Valve

P1238 VOLVO Possible Causes

  • Air leak after turbocharger
  • Pipes between turbocharger and turbocharger control valve are loose, blocked, or damaged
  • Pipes between turbocharger control valve and pressure servo are loose, blocked, or damaged
  • Faulty turbocharger control valve
  • Faulty pressure control valve pressure servo
  • Sticky boost pressure control valve

How is the P1238 VOLVO 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

The first step is to check for an air leak after the turbocharger.

Possible Symptoms

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

P1238 VOLVO Meaning

The O1238 code will be set if the engine speed is above 3500 and the engine is operating under high load, the control signal to the turbocharger control valve is at maximum, and the pressure sensor pressure is below approximately 2.9 psi under normal boost pressure (signal too low). If the mass air flow sensor mass is above the desired value (signal too high), this is interpreted as a fault by the Engine Control Module (ECM). When the code is set, a reduction in boost pressure is used as a substitute value.

P1239 – Throttle Position Sensor Circuit Range/Performance

P1239 Possible Causes

  • Faulty electronic throttle control actuator (TP sensors 1 and 2)
  • Electronic throttle control actuator wiring harness is open or short-circuited
  • Poor electrical connection in the electronic throttle control actuator circuit

How is code P1239 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.

Possible Symptoms

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

P1239 Meaning

The electronic throttle control actuator consists of a throttle control motor, throttle position sensor, etc. The throttle position sensor responds to throttle valve movement.
The throttle position sensor has two sensors. These sensors are a type of potentiometer that convert the throttle valve position into output voltage and send the voltage signal to the Engine Control Module (ECM). Additionally, these sensors detect the opening and closing speed of the throttle valve and transmit voltage signals to the ECM. The ECM determines the current throttle valve opening angle from these signals, and the ECM controls the throttle control motor so the throttle valve opening angle properly adapts to driving conditions.

P1239 AUDI – Open Cylinder 3 Injector Circuit

P1239 Code AUDI – What Does It Mean?

The diagnostic code P1239 corresponds to an open circuit in cylinder 3 injector. This is a generic description, but some manufacturers may use different terminology depending on the vehicle model and year. Currently, no more specific information is available for Audi models.

Possible Symptoms

  • Illumination of the check engine light (or “Service engine soon” message)
  • In some cases, a slight loss of power or irregular engine operation may be noticed.

Possible Causes of P1239 Code

  • Faulty fuel injector (cylinder 3)
  • Injector wiring harness (cylinder 3) open or short-circuited
  • Poor electrical connection at the injector 3 circuit

How to Fix P1239 Code on an Audi?

Here are the recommended steps to diagnose and repair this code:

  1. Visually inspect the wiring harness of cylinder 3 injector:
    • Look for cut, pinched, or melted wires.
    • Check for a short circuit or break in the circuit.
  2. Examine the connectors:
    • Ensure they are not broken, bent, corroded, or poorly connected.
    • Clean the pins if necessary.
  3. Test the fuel injector:
    • Measure the resistance of injector 3 to detect any potential fault.
    • Replace it if it is defective.
  4. Check the connection to the engine control unit (ECU):
    • A poor connection or bad ground can generate this code.

If after all these checks the problem persists, it is recommended to use a professional diagnostic tool for a more in-depth test or to consult a qualified Audi technician.

P1239 CHRYSLER – Engine Oil Temperature Too Low

P1239 CHRYSLER Possible Causes

  • Engine oil
  • Faulty engine oil temperature sensor
  • Engine oil temperature sensor harness is open or shorted
  • Poor electrical connection in the engine oil temperature sensor circuit
  • Faulty Powertrain Control Module (PCM)

How is the P1239 CHRYSLER 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.

Possible Symptoms

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

P1239 CHRYSLER Meaning

The Engine Oil Temperature (EOT) sensor is a variable resistor that measures the engine oil temperature. The Powertrain Control Module (PCM) provides a 5-volt reference and ground to the low reference signal sensor circuit. When the oil temperature is low, the sensor resistance is high. When the oil temperature is high, the sensor resistance is low. Diagnostic Trouble Code (DTC) P1239 is set when the engine oil temperature rises slower than a calibrated modeled temperature. When the actual oil temperature falls below the lower limit of the calibrated modeled temperature for three minutes, the fault is set. Fault requires two trips. Three good trips to turn off the MIL.

P1239 DODGE – Engine Oil Temperature Too Low

P1239 DODGE Possible Causes

  • Engine oil
  • Faulty engine oil temperature sensor
  • Engine oil temperature sensor harness is open or shorted
  • Poor electrical connection in the engine oil temperature sensor circuit
  • Faulty Powertrain Control Module (PCM)

How is the P1239 DODGE 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.

Possible Symptoms

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

P1239 DODGE Meaning

The Engine Oil Temperature (EOT) sensor is a variable resistor that measures engine oil temperature. The Powertrain Control Module (PCM) provides a 5-volt reference and ground to the low reference signal sensor circuit. When the oil temperature is low, the sensor resistance is high. When the oil temperature is high, the sensor resistance is low. Diagnostic Trouble Code (DTC) P1239 is set when the engine oil temperature rises slower than a calibrated modeled temperature. When the actual oil temperature falls below the lower limit of the calibrated modeled temperature for three minutes, the fault is set. Fault requires two trips. Three good trips to turn off the MIL.

P1239 FORD – Positive Fuel Pump Speed Supply Fault

P1239 FORD Possible Causes

  • Faulty fuel pump
  • Fuel pump wiring harness open or shorted
  • Poor electrical connection in the fuel pump circuit
 

How is the P1239 FORD 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.

 
 

Possible Symptoms

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

P1239 FORD Meaning

Fuel pump speed positive supply fault is the generic description for Ford code P1239, but the manufacturer may have a different description for your vehicle model and year. Currently, we have no further information about the Ford P1239 OBDII code.

P1239 INFINITI – Throttle Position Sensor Circuit Range/Performance

P1239 INFINITI Possible Causes

  • Faulty electronic throttle control actuator (TP sensors 1 and 2)
  • Electronic throttle control actuator harness is open or shorted
  • Poor electrical connection in electronic throttle control actuator circuit

How is P1239 INFINITI 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.

Possible Symptoms

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

P1239 INFINITI Meaning

The electronic throttle control actuator consists of a throttle control motor, throttle position sensor, etc. The throttle position sensor responds to throttle valve movement.
The throttle position sensor has two sensors. These sensors are a type of potentiometer that convert throttle valve position into output voltage and send the voltage signal to the Engine Control Module (ECM). Additionally, these sensors detect the opening and closing speed of the throttle valve and transmit voltage signals to the ECM. The ECM determines the current throttle valve opening angle from these signals and the ECM controls the throttle control motor so the throttle valve opening angle properly adapts to driving conditions.

P1239 ISUZU – High Pressure Fuel System Malfunction

P1239 ISUZU Possible Causes

  • Faulty high-pressure fuel regulator
  • High-pressure fuel regulator harness is open or shorted
  • Poor electrical connection in the high-pressure fuel regulator circuit
 

How is the P1239 ISUZU 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.

 
 

Possible Symptoms

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

P1239 ISUZU Meaning

Fuel high-pressure system malfunction is the generic description for the P1239 Isuzu code, but the manufacturer may have a different description for your vehicle model and year. Currently, we have no further information on the P1239 Isuzu OBDII code.

P1239 JEEP – Engine Oil Temperature Too Low

P1239 JEEP Possible Causes

  • Engine oil
  • Faulty engine oil temperature sensor
  • Engine oil temperature sensor harness is open or shorted
  • Poor electrical connection in the engine oil temperature sensor circuit
  • Faulty Powertrain Control Module (PCM)

How is the P1239 JEEP 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.

Possible Symptoms

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

P1239 JEEP Meaning

The Engine Oil Temperature (EOT) sensor is a variable resistor that measures the engine oil temperature. The Powertrain Control Module (PCM) provides a 5-volt reference and a ground to the low reference signal sensor circuit. When the oil temperature is low, the sensor resistance is high. When the oil temperature is high, the sensor resistance is low. Diagnostic Trouble Code (DTC) P1239 is set when the engine oil temperature rises slower than a calibrated modeled temperature. When the actual oil temperature falls below the lower limit of the calibrated modeled temperature for three minutes, the fault is set. Fault requires two trips. Three good trips to turn off the MIL.

P1239 MAZDA – Positive Fuel Pump Speed Supply

P1239 MAZDA Possible Causes

  • Faulty fuel pump
  • Fuel pump harness is open or shorted
  • Poor electrical connection in the fuel pump circuit

How is the repair of code P1239 MAZDA 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.

Possible Symptoms

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

P1239 MAZDA Meaning

Fuel Pump Speed Positive Supply is the generic description for Mazda code P1239, but the manufacturer may have a different description for your vehicle model and year. Currently, we do not have further information on the Mazda OBDII P1239 code.