Engine codes

gonnagetagt · 04-05-2003, 10:12 PM

I scanned my car today and I got three codes.

KOEO code 63 TP Sensor Below Minimum Voltage
My guess is the Throttle Position Sensor is bad.

KOEO code 10 Low cylinder compression on #1
Any ideas?

The next code didn't appear until after I ran a cylinder balance test.

KOEO code 98 Hard Fault Present FMEM Mode Engaged
Any ideas?

Any help is appreciated and thanks in advance.

Michael Smith · 04-07-2003, 05:22 PM

code 98 should have been a koer. Code98 comes on when the computer is compensating for the current hard faults to keep the engine running. If you fix the other faults 98 should go away.

code 63 TP sensor; You can check two things the VREF or TPsignal. If you need info on this let me know and I will try to help you. Its pretty easy you just need a multimeter.

code 10; I dont know what to tell you about that because
code 11 should be the lowest code given and 11 is system pass.

Try this first, dissconect your battery for 20min this will be enough time to clear the codes. Drive around till the engine reaches operating tempature then re-code to see if those codes are still present. Do it in order 1. KOEO 2.timing check as per code scanner. 3. KOER keep in mind some scanners will not give a solid code when doing KOER until the faults in KOEO are fixed and code 11 system pass is present in KOEO. 4. Cylinder balance test.

Let me know how it goes and good luck.

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04-05-2003, 10:12 PM	#1
gonnagetagt Registered Member Join Date: Dec 2002 Location: Romeo Posts: 6	Engine codes I scanned my car today and I got three codes. KOEO code 63 TP Sensor Below Minimum Voltage My guess is the Throttle Position Sensor is bad. KOEO code 10 Low cylinder compression on #1 Any ideas? The next code didn't appear until after I ran a cylinder balance test. KOEO code 98 Hard Fault Present FMEM Mode Engaged Any ideas? Any help is appreciated and thanks in advance.

04-07-2003, 05:22 PM	#2
Michael Smith Registered Member Join Date: Feb 2003 Location: Washington Posts: 33	code 98 should have been a koer. Code98 comes on when the computer is compensating for the current hard faults to keep the engine running. If you fix the other faults 98 should go away. code 63 TP sensor; You can check two things the VREF or TPsignal. If you need info on this let me know and I will try to help you. Its pretty easy you just need a multimeter. code 10; I dont know what to tell you about that because code 11 should be the lowest code given and 11 is system pass. Try this first, dissconect your battery for 20min this will be enough time to clear the codes. Drive around till the engine reaches operating tempature then re-code to see if those codes are still present. Do it in order 1. KOEO 2.timing check as per code scanner. 3. KOER keep in mind some scanners will not give a solid code when doing KOER until the faults in KOEO are fixed and code 11 system pass is present in KOEO. 4. Cylinder balance test. Let me know how it goes and good luck.