P2576 – Intermittent/Erratic Ozone Reduction Catalyst Deterioration Sensor Circuit

P2576 Possible Causes

  • Faulty direct reduction ozone catalyst deterioration sensor
  • Direct reduction ozone catalyst deterioration sensor harness open or shorted
  • Poor electrical connection in direct reduction ozone catalyst deterioration sensor circuit

How to Fix Code P2576

Check 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 illuminated (or service engine soon warning light)

P2576 Meaning

The engine control module (ECM) monitors the signal from the direct reduction ozone catalyst deterioration sensor. The ECM sets the OBDII code when the direct reduction ozone catalyst deterioration sensor signal falls outside factory specifications.

P2577 – Direct Efficiency of the Ozone Reduction Catalyst Below Threshold

P2577 Possible Causes

  • Faulty direct reduction ozone catalyst deterioration sensor
  • Direct reduction ozone catalyst deterioration sensor harness open or shorted
  • Poor electrical connection in direct reduction ozone catalyst deterioration sensor circuit

How to Fix Code P2577

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

Possible Symptoms

Illuminated engine light (or service engine soon warning light)

P2577 Meaning

The Engine Control Module (ECM) monitors the signal from the direct reduction ozone catalyst deterioration sensor. The ECM sets the OBDII code when the direct reduction ozone catalyst deterioration sensor signal falls outside factory specifications.

P2578 – Turbocharger Speed Sensor Circuit

P2578 Possible Causes

  • Faulty turbocharger speed sensor
  • Turbocharger speed sensor harness is open or shorted
  • Poor electrical connection in turbocharger speed sensor circuit

How to Fix Code P2578

Check 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)

P2578 Meaning

The powertrain control module (PCM) monitors the signal from the turbocharger speed sensor circuit. The PCM sets the OBDII code when the turbocharger speed sensor signal is outside factory specifications.

P2579 – Turbocharger Speed Sensor Circuit Range/Performance

P2579 Possible Causes

  • Faulty turbocharger speed sensor
  • Turbocharger speed sensor harness is open or shorted
  • Poor electrical connection in turbocharger speed sensor circuit

How to Fix Code P2579

Check 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

Illuminated engine light (or service engine soon warning light)

P2579 Meaning

The Powertrain Control Module (PCM) monitors the signal from the turbocharger speed sensor circuit. The PCM sets the OBDII code when the turbocharger speed sensor signal is outside factory specifications.

P257A – Vacuum Reservoir Control Circuit / Open

P257A Possible Causes

  • Faulty vacuum reservoir control
  • Vacuum reservoir control harness is open or shorted
  • Poor electrical connection in vacuum reservoir control circuit

How to Fix Code P257A

Check 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

Illuminated engine light (or service engine soon warning light)

P257A Meaning

The Engine Control Module (ECM) monitors the vacuum reservoir control circuit signal. The ECM sets the OBDII code when the vacuum reservoir control circuit signal is outside factory specifications.

P257B – Low Vacuum Reservoir Control Circuit

P257B Possible Causes

  • Faulty vacuum tank control
  • Vacuum tank control harness is open or shorted
  • Poor electrical connection in vacuum tank control circuit

How to Fix Code P257B

Check 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

Illuminated check engine light (or service engine soon warning light)

P257B Meaning

The Engine Control Module (ECM) monitors the vacuum tank control circuit signal. The ECM sets the OBDII code when the vacuum tank control circuit signal is outside factory specifications.

P257C – High Vacuum Tank Control Circuit

P257C Possible Causes

  • Faulty vacuum reservoir control
  • Vacuum reservoir control harness is open or shorted
  • Poor electrical connection in vacuum reservoir control circuit

How to Fix Code P257C

Check 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

Illuminated engine light (or service engine soon warning light)

P257C Meaning

The Engine Control Module (ECM) monitors the vacuum reservoir control circuit signal. The ECM sets the OBDII code when the vacuum reservoir control circuit signal is outside factory specifications.

P257D – Engine Hood Switch Circuit Range / Performance

P257D Possible Causes

  • Faulty engine hood switch
  • Engine hood switch wiring harness is open or short-circuited
  • Poor electrical connection in the engine hood switch circuit

How to Fix Code P257D

Check 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)

P257D Meaning

The Powertrain Control Module (PCM) monitors the signal from the engine hood switch circuit. The PCM sets the OBDII code when the engine hood switch signal is outside factory specifications.

P257E – Engine Hood Switch Circuit Low

P257E Possible Causes

  • Faulty hood switch
  • Hood switch harness is open or shorted
  • Poor electrical connection in hood switch circuit

How to Fix Code P257E

Check 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 illuminated (or service engine soon warning light)

P257E Meaning

The Powertrain Control Module (PCM) monitors the signal from the hood switch circuit. The PCM sets the OBDII code when the hood switch signal is outside factory specifications.

P257F – High Engine Hood Switch Circuit

P257F Possible Causes

  • Faulty engine hood switch
  • Engine hood switch wiring harness is open or short-circuited
  • Poor electrical connection in the engine hood switch circuit

How to Fix Code P257F

Check 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 illuminated (or service engine soon warning light)

P257F Meaning

The Powertrain Control Module (PCM) monitors the signal from the engine hood switch circuit. The PCM sets the OBDII code when the engine hood switch signal is outside factory specifications.