My daughtrs 2001 Chevy s10 has an itermitant starting problem.

1988 chev s10 This can't be the year of the vehicle . Did not have P or U code's in 1988 , you must mean 98 ?

You need to test the start wire at the starter when the key is turned to crank position to make sure it has power during cranking. Sometimes tapping on the starter motor with a hammer while cranking will engage a bad starter motor

It could be the Bendix inside the starter which engages the
starter drive.

Wouldn't expect ant codes with this issue. If you have a volt meter check for 12v on the small terminal of the solenoid. 12V should appear when the key is turned to the start position. If 12V dose not appear when key is turned to start your switch circuit has a problem. If you have no volt meter you can do this test by turning the key to the run position. Then tap the small terminal of the solenoid with a wire that is connected to 12Vs. This can be from battery or the hot terminal on the solenoid. If the starter dose not engage the solenoid part of the starter is not working. You got a bad starter take it back for a replacement. If the starter engages your switch circuit has a problem. & good luck with that.

replace the ignition switch as there is a problem in the contacts

Read this link. The Anti theft security system may be your problem. Read thru the symptoms and compare to your situation

http://vatspasslockpasskeysecurityhelp.yolasite.com/

Starter drive (bendix) is bad. Starter drive is spring loaded and when cold sometimes hangs up or spring goes bad. 2 options - remove starter, disassemble and install new starter drive or just buy rebuilt start (has new drive in)

It is so confusing though I had a go at one sometime and it took a whole lot out of us before we realised that it needed a touch from Chevy garage.

Please visit the Chevy Garage it won't cost you much to fix.

Good luck and thanks for using Fixya.

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there is a solinoid that enguages the starter it is stuck tap the round cylinder that is atached to the top of the starter it should disenguage the solinoid if not try to hit it harder. dont beat it up though. it also may need a new starter.

could be a loose wire on the starter , check your connections