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How do I reset the pcm on my truck? - 2002 Chevrolet Silverado 2500HD

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2 Answers

Resetting the pcm my alternator not chargin


I don't know what kind of testing you have done? Are there any codes for the charging system? I don't like taking negative battery cable loose trying to reset some system, if may cause more problems than you have, now.
In the diagram, the wire from generator to pcm has a duty cycle signal on it.
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Nov 13, 2016 | Cars & Trucks

1 Answer

What do codes P0411, P1000


P1000 code means the codes were cleared or the battery was disconnected
Powertrain Control Module (PCM) Reset Description All OBDII scan tools support the powertrain control module (PCM) reset.
The PCM Reset allows the scan tool to command the PCM to clear all emission-related diagnostic information. When resetting the PCM, a DTC P1000 will be stored in the PCM until all the OBD II system monitors or components have been tested to satisfy a drive cycle, without any other faults occurring. For more information about a drive cycle, refer to Drive Cycles .
The following events occur when a PCM reset is performed:
  • Clears the number of Diagnostic Trouble Codes (DTCs).
  • Clears the DTCs.
  • Clears the freeze frame data.
  • Clears diagnostic monitoring test results.
  • Resets status of the OBD II system monitors.
  • Sets DTC P1000.

P0411 Secondary Air Injection System Incorrect Flow Detected

neither of these could cause a no start or no crank problem . Is the battery good an do you have good connections on the battery ? Do the headlamps show bright when on ?

Oct 14, 2015 | 1997 Lincoln Continental

2 Answers

I got a 2000 gmc Jimmy no start, no spark and diagnostic computer says no link or communication from pcm. Any ideas? I did check all the fuses and the wiring to the distributor, crank sensor, ignition...


If vehicle has been submerged, PCM is likely dead. If vehicle has been struck by lightning, PCM could be locked up or dead. Assuming none of these has happened:
Check power to PCM, not just fuses. You can check through the backside of the connectors ON the PCM.
Check connectors on PCM.
Check ground to PCM.
Make sure you've had no rodent activity on vehicle wiring.
Reset PCM by disconnecting battery (+) lead, waiting 15 seconds, then grounding battery (+) to battery (-) lead. Reconnect battery (+) lead to battery. All user memory sets such as radio and seat settings will be lost.
With no output from PCM, after resetting, the highest probability is dead PCM. It's rare, but it happens.

Nov 10, 2014 | 2000 GMC Jimmy

1 Answer

Limp mode reset


limp mode means something is broken, with
PCM or TCM. (bad sensors or actuators)
resetting PCM.
1: press reset on scan tool.
2: pull memory fuse to ECU.
3: pull battery neg lug and radio bricks and need to do relearn modes. on many things.

if the problem remains, resetting it does nothing, it come back fast.

Jun 14, 2014 | 2006 Suzuki Grand Vitara

1 Answer

Reset pcm


usa? no location makes this impossible but...
ill try.
IN USA plug in the $9 scan tool and push reset. (all cars 96+ or newer)
outside of usa, pull the memory fuse, for PCM.
if desperated, pull battery neg lug for 5min, step on brake
and put back battery,
oops lost the radio codes, so get the radio codes first , always)

hondas use different fuse for the memory wire. so RTm
so read the FSM
read at alldata.com. it all there.'

Nov 29, 2013 | 2001 Acura MDX

1 Answer

Reset check engine light


we get it serviced,? or better, SCAN it>? !!!!
but all cars with EFI, from ~1988 to now, (about) the PCM
is reset , by 3 ways,
1: scan tool reset. push the button, bingo.
2: pull the PCM memory fuse for 5min (now called, IOD )
3: pull battery NEG lug, and this bricks Radio, NAV and all things with learn mode, just forgot and the "entanglements there of"


posted like 1000 times here, so 1001.
if repair, PCM,s so this is my bag (jones), (retried)


easy as 1,2,3,
#2 is free, not a dime of cost. or risk of done correct.
if only PCM IOD is pulled. mine has 6 OIDs, the PCM is the correct one.

Oct 20, 2013 | 2008 Jeep Patriot

1 Answer

Changed PCM


new PCM and security system has to reprogrammed at dealership when you replace the PCM.VECHICLES 1995 to 1981 you could replace PCM.NO NEED REPROGRAM.

Jun 12, 2013 | 1998 Pontiac Sunfire

1 Answer

How to install a pcm on a 1996 seabring convertable


Right. Just like you said should work. Connect pcm, then the battery.

Oct 28, 2012 | Cars & Trucks

2 Answers

How do I reset the PCM on 2001 LeSaber?


The PCM can be cleared/reset by either using a scan tool or by disconnecting the battery negative cable for 5 minutes.

Jan 26, 2012 | 2001 Buick LeSabre

1 Answer

I just replaced the altenator and got a new battery but now my car is still acting the same by not starting. It is hardly turning over. Would this be the voltage regulator?


ON the older model cars and trucks it would be the voltage regulator. On the newer model cars and trucks the pcm (power control module ) controls the voltage from the alternator. The newer model cars and trucks will have to go back to a dealer to reset the pcm,if they cannot reset the pcm it will have to be replaced. Hope this will help you.

May 20, 2010 | Cars & Trucks

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