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Re: P0089 fault code
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Posted by SWEDECAR [Email] (#112) [Profile/Gallery] (more from SWEDECAR) on Wed, 19 Oct 2022 07:59:33 Share Post by Email
In Reply to: P0089 fault code, Brian Brown, Wed, 19 Oct 2022 05:29:50
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Usually two reasons for that code. A failing fuel pressure sensor or fuel pump.
Fuel pressure sensor is the easiest to replace first and it might cure the problem but otherwise it probably needs a fuel pump.

With the Tech 2 scanner, the health of the fuel pump can be studied by looking at fuel pump duty cycle.

With a new fuel pump it is usually 35% at idle and 65% at full throttle acceleration (WOT).

A bad fuel pump might show 50% at idle and spring up to max 94.5% at WOT.

Anders

SWEDECAR

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