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no throttle response
Vehicle: 06 isuzu npr 5.2 dsl
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1 Answer

Hi there,

This code indicates an issue with the fuel pressure sensor. Here is some info for you.

P0091 ISUZU - Fuel Pressure Regulator Solenoid 1 Control Circuit Low Voltage

Read more: https://www.autocodes.com/p0091_isuzu.html

answered by (9.9k points)

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