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Engine surges only at idle. Bring rpm up to 700 engine idles great till put in gear then surges

Vehicle: 2001 Isuzu npr 6 cyl diesel

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Hi there,

These codes indicate an issue with the engine temp sensor. Here is some info for you.

P0118 ISUZU - Engine Coolant Temperature Sensor 1 Circuit High Voltage

Read more: https://www.autocodes.com/p0118_isuzu.html

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