[SOLVED] P1491 Code – Fix Insufficient Lift In Exhaust Gas Recirculation Valve

If you’ve noticed the Engine Light ON or the Service Engine Soon Warning Light in your car, it could be due to the fault code P1491. This code indicates a problem with the Exhaust Gas Recirculation (EGR) system.

The possible causes include a faulty EGR valve, open or shorted EGR valve harness, poor electrical connection, clogged EGR valve, or exhaust gas leaks. To fix this issue, you should visually inspect the wiring harness and connectors, checking for any damage or corrosion. Additionally, look out for broken, bent, pushed out, or corroded connector pins.

The repair time for this issue is estimated to be around 1.0. Remember to check the “Possible Causes” mentioned above to ensure a proper fix.

Repair Importance Level10.0 (Out of 10)
Estimated Repair TimeApproximately 1.0 hour
Repair Difficulty Level10.0 (Out of 10)

If you see the Engine Light ON or the Service Engine Soon Warning Light, it could be due to the p1491 fault code.

  • The symptoms of the automobile fault code p1491 include the Engine Light being ON or the Service Engine Soon Warning Light being illuminated.

The automobile fault code p1491 can be caused by a faulty Exhaust Gas Recirculation Valve, open or shorted harness, poor electrical connection, clogged valve, or exhaust gas leaks.

  • The fault code P1491 can be caused by several factors, including a faulty Exhaust Gas Recirculation (EGR) Valve, an open or shorted EGR Valve harness, poor electrical connection in the EGR Valve circuit, a clogged EGR Valve, and exhaust gas leaks.

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To fix the p1491 fault code, start by visually inspecting the wiring harness, connectors, and components for any damage or corrosion.

  • To fix the automobile fault code p1491, follow these steps: 1.
  • Check the possible causes mentioned above.
  • 2.
  • Visually inspect the wiring harness and connectors related to the fault code.
  • 3.
  • Look for any damaged components.
  • 4.
  • Check for broken, bent, pushed out, or corroded pins in the connectors.
  • The estimated repair time for this fix is 1.0 hour.

The automobile fault code P1491 diagnosis and fixing cost is influenced by the estimated repair time of 1.0 hour.

Most auto repair shops typically charge between $75 and $150 per hour for their services.

The P1491 fault code indicates a problem with the Exhaust Gas Recirculation (EGR) valve.

The EGR system helps reduce emissions by recirculating inactive exhaust gas into the airfuel mixture, lowering combustion temperatures and reducing nitrogen oxide (NOx) emissions. The EGR valve position sensor, which is built into the EGR valve, detects the amount of valve lift.

The Powertrain Control Module (PCM) stores a target valve lift value to optimize exhaust gas recirculation based on driving conditions.

When the PCM compares the command value with the EGR valve position sensor output signal value and finds a significant difference for a set period of time, it considers either the EGR valve or the EGR valve position sensor faulty. This triggers the P1491 fault code and stores a Diagnostic Trouble Code (DTC). In summary, the P1491 code indicates that the EGR valve is not lifting sufficiently, which can lead to increased emissions.

It is important to address this issue promptly to ensure proper functioning of the EGR system and reduce environmental impact.

What are the possible causes of the automobile fault code P1491?

If you see the engine light or service engine soon warning light on, the fault code P1491 could be the culprit. This code is often caused by a faulty exhaust gas recirculation (EGR) valve, an open or shorted EGR valve harness, poor electrical connection in the EGR valve circuit, a clogged EGR valve, or even exhaust gas leaks. To fix this issue, start by visually inspecting the wiring harness and connectors. Look for any damaged components and check for broken, bent, pushed out, or corroded connector pins. Don’t forget to address the possible causes mentioned above.

How can I visually inspect the wiring harness and connectors to fix the P1491 fault code?

If you’re dealing with the P1491 fault code and your engine light is on, it’s time to take action. The culprit could be a faulty Exhaust Gas Recirculation (EGR) valve, an open or shorted EGR valve harness, poor electrical connection in the EGR valve circuit, a clogged EGR valve, or even exhaust gas leaks. To fix this issue, start by visually inspecting the wiring harness and connectors. Look for any damaged components and check for broken, bent, pushed out, or corroded pins in the connectors. Don’t delay, get to the bottom of this problem now!

What should I look for when checking for damaged components and connector’s pins to resolve the P1491 fault code?

If you’re dealing with the P1491 fault code and your engine light is on, it’s time to roll up your sleeves and get to work. The culprit could be a faulty Exhaust Gas Recirculation (EGR) valve, an open or shorted EGR valve harness, a poor electrical connection in the EGR valve circuit, a clogged EGR valve, or even exhaust gas leaks. To resolve this issue, start by visually inspecting the wiring harness and connectors. Look out for any damaged components and check for broken, bent, pushed out, or corroded connector’s pins. Don’t skip this step, as it could be the key to fixing the problem.

p1491 error fault code explained

If your engine light is on and you’re dealing with a P1491 fault code, it could be due to a faulty Exhaust Gas Recirculation (EGR) valve, open or shorted EGR valve harness, poor electrical connection, clogged EGR valve, or exhaust gas leaks. To fix this issue, visually inspect the wiring harness and connectors, check for damaged components, and look for any broken, bent, pushed out, or corroded connector pins.

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