P1259 ISUZU – VTEC System Malfunction

P1259 ISUZU Possible Causes

  • Low engine oil level or oil pressure
  • Faulty Variable Valve Timing and Lift Electronic Control (VTEC) solenoid
  • VTEC solenoid wiring harness is open or short-circuited
  • Poor electrical connection in the VTEC circuit
  • Faulty VTEC oil pressure switch

How is the P1259 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.

When is the code detected?

P1259 is set when there is a problem in the VTEC oil pressure switch circuit or the VTEC solenoid circuit

Possible Symptoms

  • Check engine light on (or engine maintenance warning light)

P1259 ISUZU Meaning

The Variable Valve Timing and Lift Electronic Control (VTEC) system activates the VTEC solenoid through the Powertrain Control Module (PCM) command, and it loads/unloads the hydraulic circuit of the VTEC mechanism that is installed in the valve system to switch valve timing between Low and High. The PCM monitors the oil pressure conditions in the hydraulic circuit of the VTEC mechanism based on the VTEC oil pressure switch downstream of the VTEC solenoid. If there is a disparity between the oil pressure condition in the hydraulic circuit that is determined by the PCM command, and the oil pressure condition that is determined by the state of the VTEC oil pressure switch, the system is considered faulty and the P1259 code is stored.

P125A – Nitrogen Oxide Sensor Heater Heat Flow Too Low During Startup

P125A Possible Causes

  • Faulty nitrogen oxide (NOx) sensor
  • Nitrogen oxide (NOx) sensor wiring harness is open or short-circuited
  • Poor electrical connection in the nitrogen oxide (NOx) sensor circuit

How is code P125A 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 engine maintenance warning light)

P125A Meaning

The engine control module (ECM) monitors the nitrogen oxide (NOx) sensor. The ECM sets the OBDII code when the nitrogen oxide (NOx) sensor does not meet factory specifications.

P125A BMW – Nitrogen Oxide Sensor Heater Flow Too Low During Startup

P125A BMW Possible Causes

  • Faulty nitrogen oxide (NOx) sensor
  • Nitrogen oxide (NOx) sensor wiring harness is open or short-circuited
  • Poor electrical connection in the nitrogen oxide (NOx) sensor circuit

How is BMW P125A 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.

Possible Symptoms

  • Engine light on (or engine maintenance warning light)

P125A BMW Meaning

The Engine Control Module (ECM) monitors the nitrogen oxide (NOx) sensor. The ECM sets the OBDII code when the nitrogen oxide (NOx) sensor does not meet factory specifications.

P125A MINI – Nitrogen Oxide Sensor Heater Flow Rate Too Low During Startup

P125A MINI Possible Causes

  • Faulty nitrogen oxide (NOx) sensor
  • Nitrogen oxide (NOx) sensor harness is open or shorted
  • Poor electrical connection in the nitrogen oxide (NOx) sensor circuit

How is P125A MINI 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)

P125A MINI Meaning

The Engine Control Module (ECM) monitors the nitrogen oxide (NOx) sensor. The ECM sets the OBDII code when the nitrogen oxide (NOx) sensor does not meet factory specifications.

P125B – Nitrogen Oxide Sensor Heater Heat Flow Too Low During Operation

P125B Possible Causes

  • Faulty nitrogen oxide (NOx) sensor
  • Nitrogen oxide (NOx) sensor harness is open or short-circuited
  • Poor electrical connection in the nitrogen oxide (NOx) sensor circuit

How is P125B 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.

Possible Symptoms

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

P125B Meaning

The Engine Control Module (ECM) monitors the nitrogen oxide (NOx) sensor. The ECM sets the OBDII code when the nitrogen oxide (NOx) sensor does not meet factory specifications.

P125B BMW – Nitrogen Oxide Sensor Heater Flow Too Low During Operation

P125B BMW Possible Causes

  • Faulty nitrogen oxide (NOx) sensor
  • Nitrogen oxide (NOx) sensor wiring harness is open or short-circuited
  • Poor electrical connection in the nitrogen oxide (NOx) sensor circuit

How is BMW P125B 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.

Possible Symptoms

  • Engine light on (or engine maintenance warning light)

P125B BMW Meaning

The engine control module (ECM) monitors the nitrogen oxide (NOx) sensor. The ECM sets the OBDII code when the nitrogen oxide (NOx) sensor does not meet factory specifications.

P125C – Nitrogen Oxide Sensor Heater Supply Voltage

P125C Possible Causes

  • Faulty nitrogen oxide (NOx) sensor
  • Nitrogen oxide (NOx) sensor harness is open or short-circuited
  • Poor electrical connection in the nitrogen oxide (NOx) sensor circuit

How is P125C 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.

Possible Symptoms

  • Engine light on (or engine maintenance warning light)

P125C Meaning

The Engine Control Module (ECM) monitors the nitrogen oxide (NOx) sensor. The ECM sets the OBDII code when the nitrogen oxide (NOx) sensor does not meet factory specifications.

P125C BMW – Nitrogen Oxide Sensor Heater Supply Voltage

P125C BMW Possible Causes

  • Faulty nitrogen oxide (NOx) sensor
  • Nitrogen oxide (NOx) sensor harness is open or short-circuited
  • Poor electrical connection in the nitrogen oxide (NOx) sensor circuit

How is BMW P125C 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.

Possible Symptoms

  • Engine light on (or engine maintenance warning light)

P125C BMW Meaning

The Engine Control Module (ECM) monitors the nitrogen oxide (NOx) sensor. The ECM sets the OBDII code when the nitrogen oxide (NOx) sensor does not meet factory specifications.

P1260 – Anti-Theft Immobilized Vehicle Detected

P1260 Possible Causes

  • Powertrain Control Module (PCM) improperly programmed
  • Instrument Cluster (IC) or Instrument Panel Cluster (IPC) improperly programmed
  • Previous theft condition
  • Anti-theft system issue

How is P1260 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

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

P1260 Meaning

The P1260 code may be set if the Passive Anti-Theft System (PATS) has determined that a theft condition existed and the engine is disabled or an engine start was attempted using a non-PATS key. This Diagnostic Trouble Code (DTC) is a good indicator to check PATS for DTCs. This DTC may also be set when a new Instrument Cluster (IC), Instrument Panel Cluster (IPC), or Powertrain Control Module (PCM) is installed without properly programming either module, even if the vehicle is not equipped with PATS.

P1260 FORD F150 – Theft Detected – Vehicle Immobilized

P1260 FORD F150 Possible Causes

  • Powertrain Control Module (PCM) improperly programmed
  • Instrument Cluster (IC) or Instrument Panel Cluster (IPC) improperly programmed
  • Previous theft condition
  • Anti-theft system issue

How is the P1260 FORD F150 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

Indicates that the Passive Anti-Theft System (PATS) has determined that a theft condition existed and the engine is disabled. This DTC is a good indicator to check PATS for DTCs.

When is the code detected?

The Engine Control Module (ECM) received a signal from the anti-theft system indicating that a violation has occurred

Possible Symptoms

  • Engine light on (or engine service warning light)
  • Starting/Stalling or Cranking/No start

P1260 FORD F150 Meaning

The P1260 code may be set if the Passive Anti-Theft System (PATS) has determined that a theft condition existed and the engine is disabled or if an engine start was attempted using a non-PATS key. This Diagnostic Trouble Code (DTC) is a good indicator to check PATS for DTCs. This DTC may also be set when a new Instrument Cluster (IC), Instrument Panel Cluster (IPC), or Powertrain Control Module (PCM) is installed without properly programming either module, even if the vehicle is not equipped with PATS.