I'm having fault code P1520(b) continuously

Tiny
JHUMUNN1
  • 2003 ISUZU
  • 150,000 MILES

On my 2003 isuzu kb 300. First time got fault codes p1335, p1612, p1613 and p1520. ECU reset p1520 left.

It has a 3.0 4jh1 engine with manual transmission. Loss of power noted and check engine light remains on constantly. All sensor are tested good.

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Monday, November 21st, 2011 AT 12:08 PM

1 Reply

Tiny
2CARPROS KEN
  • ADMIN
  • 5,510 POSTS

Hey JHUMUNN1,

IT sounds like you have a intake runner valve problem, check the linkage and the servo diaphragm becasue these parts fail often. If these parts or okay try clearing the codes and then drive the car again. Before the check engine light come on or as soon as the light comes out scan it for codes to get the more prominent one, this is becasue the other codes could be caused by the first code and you don't want to be lead down the wrong trail.

If you have replaced sensors, checked wiring. The ECM itself may be bad.

Please let us know happens so it will help others.

Best, Ken

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Wednesday, December 14th, 2016 AT 4:10 PM

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