P1237 VOLKSWAGEN – Open Cylinder 1 Injector Circuit

P1237 VOLKSWAGEN Possible Causes

  • Faulty fuel injector 1
  • Fuel injector 1 harness is open or shorted
  • Poor electrical connection in fuel injector 1 circuit

How is the P1237 VOLKSWAGEN 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.

Possible Symptoms

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

P1237 VOLKSWAGEN Meaning

Cylinder 1 Injector Circuit Open is the generic description for Volkswagen code P1237, but the manufacturer may have a different description for your vehicle model and year. Currently, we have no further information about the Volkswagen P1237 OBDII code.

P1238 – Fuel Pump Secondary Circuit Malfunction

P1238 Possible Causes

  • Faulty Fuel Pump Driver Module (FPDM)
  • Fuel Pump Driver Module (FPDM) harness is open or shorted
  • Poor electrical connection in the Fuel Pump Driver Module (FPDM) circuit
  • Faulty fuel pump

How is code P1238 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.

Possible Symptoms

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

P1238 Meaning

This DTC indicates that the Fuel Pump Driver Module (FPDM2) has detected a fuel pump secondary circuit issue. The FPDM2 sends a message to the Powertrain Control Module (PCM) via the Fuel Pump Monitor (FPM2) circuit, indicating that this problem has been detected. The PCM sets the DTC when the message is received.

P1238 FORD F150 – Fuel Pump Secondary Circuit Malfunction

P1238 1997 FORD F150 Possible Causes

  • Faulty Fuel Pump Driver Module (FPDM)
  • Fuel Pump Driver Module (FPDM) harness is open or shorted
  • Poor electrical connection in the Fuel Pump Driver Module (FPDM) circuit
  • Faulty fuel pump

How is code P1238 1997 FORD F150 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.

Technical Notes

Note: For LS6/LS8 and Thunderbird, FPDM functions are integrated into the Rear Electronic Module (REM). Additionally, the REM does not use an FPM circuit. Diagnostic information is sent over the communication link.
P1238 indicates that the FPDM detected a fault in the fuel pump secondary circuit. The FPDM will send a message to the PCM via the FPM circuit, indicating that this fault has been detected. The PCM will set the DTC when the message is received.

When is the code detected?

The Fuel Pump Driver Module detected a fault in the fuel pump secondary circuit

Possible Symptoms

  • Engine Light On (or Service Engine Soon Warning Light)
  • Engine will not start

P1238 1997 FORD F150 Meaning

This DTC indicates that the Fuel Pump Driver Module (FPDM2) detected a fuel pump secondary circuit problem. The FPDM2 sends a message to the Powertrain Control Module (PCM) via the Fuel Pump Monitor (FPM2) circuit, indicating that this problem has been detected. The PCM sets the DTC when the message is received.

P1238 AUDI – Open Cylinder 2 Injector Circuit

P1238 AUDI Possible Causes

  • Faulty fuel injector 2
  • Fuel injector 2 harness is open or shorted
  • Poor electrical connection in fuel injector 2 circuit

How is code P1238 AUDI 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)

P1238 AUDI Meaning

Injector Circuit Open Cylinder 2 is the generic description for Audi P1238 code, but the manufacturer may have a different description for your vehicle model and year. Currently, we have no further information about the Audi P1238 OBDII code.

P1238 CHEVROLET – Injector 6 Output Circuit

P1238 CHEVROLET Possible Causes

  • Faulty fuel injector 6
  • Fuel injector 6 harness is open or shorted
  • Poor electrical connection in fuel injector 6 circuit
  • Faulty Fuel Injection Control Module (FICM)
  • Faulty Engine Control Module (ECM)

How is code P1238 CHEVROLET 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

If a single fuel injector control circuit diagnostic trouble code (DTC) is set, an open circuit or poor connection is the most likely cause. If groups of 4 fuel injector control circuit DTCs are set, suspect a short to ground. Cylinder groups are 2, 3, 5, 8 or 1, 4, 6, 7. More than 4 fuel injector control circuit DTCs set indicate a short circuit in the fuel injector control circuit is the most likely cause.

Possible Symptoms

  • Engine Light On (or Service Engine Soon Warning Light)
  • Engine Misfire
  • Rough Running

P1238 CHEVROLET Meaning

The Engine Control Module (ECM) activates the appropriate fuel injector on the compression stroke for each cylinder. The ECM controls the Fuel Injection Control Module (FICM) by grounding the control circuit through a semiconductor device called a driver. The ECM monitors the driver status. If the ECM detects an incorrect voltage for the commanded state of a fuel injector driver, diagnostic trouble code (DTC) P1223, P1226, P1229, P1232, P1235, P1238, P1241 or P1244 will be set.

P1238 FORD – Secondary Fuel Pump Circuit Malfunction

P1238 FORD Possible Causes

  • Faulty Fuel Pump Driver Module (FPDM)
  • Fuel Pump Driver Module (FPDM) harness is open or shorted
  • Poor electrical connection in the Fuel Pump Driver Module (FPDM) circuit
  • Faulty fuel pump

How is code P1238 FORD 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.

Technical Notes

Note: For LS6/LS8 and Thunderbird, FPDM functions are integrated into the Rear Electronic Module (REM). Additionally, the REM does not use an FPM circuit. Diagnostic information is sent over the communication link.

When is the code detected?

The fuel pump control module detected a fault in the fuel pump secondary circuit

Possible Symptoms

  • Engine light on (or service engine soon warning light)
  • Engine does not start

P1238 FORD Meaning

This DTC indicates that the Fuel Pump Driver Module (FPDM2) has detected a fuel pump secondary circuit issue. The FPDM2 sends a message to the Powertrain Control Module (PCM) via the Fuel Pump Monitor (FPM2) circuit, indicating that this issue has been detected. The PCM sets the DTC when the message is received.

P1238 GMC – Injector 6 Output Circuit

GMC Code P1238: Causes, Symptoms and Repair

1. Meaning of GMC Code P1238

The Engine Control Module (ECM) activates the appropriate fuel injector during the compression stroke of each cylinder. It controls the Fuel Injection Control Module (FICM) by grounding the control circuit via a solid-state driver.

The ECM monitors the driver’s status, and if an incorrect voltage is detected for the commanded state of an injector, a Diagnostic Trouble Code (DTC) will be generated, including:

  • P1223, P1226, P1229, P1232, P1235, P1238, P1241 or P1244.

2. Possible Causes of GMC Code P1238

Common causes of this error code are:

  • Faulty fuel injector 6
  • Fuel injector 6 harness open or shorted
  • Poor electrical connection in fuel injector 6 circuit
  • Faulty Fuel Injection Control Module (FICM)
  • Faulty Engine Control Module (ECM)

3. Possible Symptoms

A vehicle displaying code P1238 may exhibit the following symptoms:

  • Illuminated check engine light (or “Service Engine Soon” warning light)
  • Engine misfire
  • Rough idle

4. How to Repair GMC Code P1238?

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

  1. Check the possible causes mentioned above.
  2. Visually inspect the wiring harness and connectors related to fuel injector 6.
  3. Look for damaged components and inspect the connector pins for any breakage, bending, or corrosion.

5. Technical Notes

  • If a single injector control circuit DTC is stored, an open circuit or poor connection is likely the cause.
  • If four injector control circuit DTCs are set, a short to ground should be suspected.
  • The cylinder groups involved are:
    • Group 1: Cylinders 2, 3, 5, 8
    • Group 2: Cylinders 1, 4, 6, 7
  • If more than 4 DTCs are stored, a short circuit in the fuel injector control circuit is the most likely cause.

P1238 INFINITI – Electric Throttle Control Actuator

P1238 INFINITI Possible Causes

  • Faulty electronic throttle control actuator
  • Throttle plate sticking due to carbon buildup
  • Electronic throttle control actuator wiring harness is open or short-circuited
  • Poor electrical circuit connection of the electronic throttle control actuator

How is P1238 INFINITI 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.

When is the Code Detected?

The P2119 code is detected when the electronic throttle control actuator does not function properly due to a malfunction of the return spring or when the engine control module (ECM) detects that the throttle valve is stuck in the open position.

Possible Symptoms

  • Check engine light on (or service engine soon warning light)
  • No response from the accelerator pedal

P1238 INFINITI Meaning

The electronic throttle control actuator consists of a throttle control motor, throttle position sensor, etc. The throttle control motor is operated by the engine control module (ECM) and it opens and closes the throttle valve.
The throttle position sensor detects the position of the throttle valve and sends the voltage signal to the ECM. The ECM evaluates the current throttle opening angle and controls the throttle opening angle in response to driving conditions via the throttle control motor.

P1238 ISUZU – High Fuel Pressure Regulator Circuit Shorted to Battery

P1238 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 P1238 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)

P1238 ISUZU Meaning

High-pressure fuel regulator circuit shorted to battery is the generic description for P1238 Isuzu code, but the manufacturer may have a different description for your vehicle model and year. Currently, we have no further information about the P1238 Isuzu OBDII code.

P1238 MAZDA – Fuel Pump Driver Module Disabled or Offline

P1238 MAZDA Possible Causes

  • Faulty Fuel Pump Driver Module (FPDM)
  • Fuel Pump Driver Module (FPDM) harness is open or shorted
  • Poor electrical connection in the Fuel Pump Driver Module (FPDM) circuit

How is the P1238 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.

Technical Notes

Fuel Pump Driver Module (FPDM) disabled or offline

Possible Symptoms

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

P1238 MAZDA Meaning

Fuel Pump Driver Module disabled or offline is the generic description for the Mazda P1238 code, but the manufacturer may have a different description for your vehicle model and year. Currently, we have no further information about the Mazda P1238 OBDII code.