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General discussion

2000 Jeep Grand Cherokee issues

Feb 23, 2011 12:06PM PST

Hello, I've been having intermittent issues with my 2000 GC. It surges and shifts when driving at a constant rate down the free way and in town. I had suspected it could be transmission related but some of the posts here make me think that it might actually be related to the ECM. I did pull engine codes from the odometer as well and they seem to be leaning in that direction as well.

The codes from the odometer are as follows:
P 0121 TPS signal does not correlate to MAP sensor signal.
APPS voltage input below the minimum acceptable voltage.

P 0201 An open or shorted condition detected in control circuit for Injector # 1 or the INJ 1 injector bank.

P 0202 An open or shorted condition detected in control circuit for Injector # 2 or the INJ 2 injector bank.

P 0203 An open or shorted condition detected in control circuit for Injector # 3 or the INJ 3 injector bank.

P 0204 Injector # 4 or INJ 4 injector bank output driver stage does not respond properly to the control signal.

P 0206 Injector # 6 output driver stage does not respond properly to the control signal.

P 0207 Injector # 7 output driver stage does not respond properly to the control signal.

P 0208 Injector # 8 output driver stage does not respond properly to the control signal.

P 1594 Battery voltage sense input above target charging voltage during engine operation.

Anyone have any advice on where to look from here based on the engine codes I'm getting?

Discussion is locked

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2000 Jeep Grand Cherokee issues
Feb 23, 2011 12:08PM PST

Forgot to mention, the problem does seem to be worse in wet weather or on hot days when the AC has been running for a long time. Both of which also make me think it could be electrical rather than the trans.

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2000 Jeep grand cherokee p0202,0204,0207,0121
Mar 11, 2011 10:17AM PST

Having exact same issues, EXACT, have you had any updates to this problem. I have read many posts that seem to think the tps is the main culprit, looking forward to hearing an update, the dealership said they could not get it to repeat issue codes had cleared before I took it to them. It seems to always do the surging thing on the highway along with a slight increase/decrease in rpm's but does not always throw the code. SO FRUSTRATING.

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No update
Mar 14, 2011 12:46PM PDT

No updates thus far. I'm guessing this forum doesn't see a ton of traffic like some of the others I've been to. Sad

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TPS
Mar 17, 2011 1:20AM PDT

Bought a Throttle postition sensor today, going to put it in tomorrow, and will be on the highway sat, and sun to test it out. Hoping this will solve the issue. I will let you know the outcome.

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(NT) Any writers
Apr 1, 2011 10:03AM PDT
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Any update?
Apr 1, 2011 10:05AM PDT

Just wondering if you had any luck replacing the TPS.

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So far so good
Apr 4, 2011 10:22AM PDT

New tps is in and haven't had a chance to have on a long highway trip yet, but the short trips I have taken it seems to have solved the problem. No more rpm fluctuations, no more check engine light, no more of that shifting type feeling. So crossing my fingers that it solved the issue. Sorry I didn't get back on here sooner, been extremely busy here, getting all the other toys ready for a much needed spring. I WILL update this thread with news good or bad just to give you a heads up. Hope this will work for you, the tps was only 34 dollars at my local oreillys, hopefully it doesn't hurt that i put in non mopar part. peace out

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So far so good
Apr 15, 2011 7:32PM PDT

I just changed mine out too and it seems to have done the trick. Soooo happy it wasn't the computer that needed changing.

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Mine too
Apr 16, 2011 2:31AM PDT

keep me up to date and I will do the same