Question about 1995 Jeep Grand Cherokee

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Thanks so much for your reply...what is the PCM that you said is possibly shorting out.

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Powertrain Control Module.
Do'nt go changing this.
I did not mean the PCM is shorted.
It's possible there could be wires touching metal in one of the doors,bad door lock relays.
This should be looked at by a technician who knows electrical systems(Jeep Dealer).
Ask how much the diagnostics is first.

Posted on Oct 06, 2008

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What dose it mean when engin light falshes contstantly


Flashing Diag Code P0122
TP circuit low input
DETECTION CONDITION
• If PCM detects TP sensor voltage at PCM terminal 89 below 0.10 V after engine start, PCM determines
that TP circuit has a malfunction.
POSSIBLE CAUSE
• TP sensor malfunction
• Connector or terminal malfunction
• Open circuit between TP sensor terminal C and PCM terminal 89
• Short to ground circuit between TP sensor terminal C and PCM terminal 89
• Open circuit between TP sensor terminal A and PCM terminal 90
• Short to ground circuit between TP sensor terminal A and PCM terminal 90
• PCM malfunction

Flashing Diag Code P0123
TP circuit high input

DETECTION CONDITION
• If PCM detects TP sensor voltage at PCM terminal 89 is above 4.77 V after engine start, PCM determines
that TP circuit has a malfunction.
POSSIBLE CAUSE
• TP sensor malfunction
• Connector or terminal malfunction
• Open circuit between TP sensor terminal B and PCM terminal 91
• Short to reference voltage (Vref) supply circuit between TP sensor terminal C and PCM terminal 89
• PCM malfunction

Jun 26, 2014 | 2000 Mazda Protege

1 Answer

Error code p0446, 2006 4wd, 3 lt. ford escape


P0446 Evaporative Emmission Control System Vent Control Circuit
Evap vent valve has only one purpose. It closes in order to seal the vent so the EVAP system can pressurize and ensure there are no leaks. Evap vent valve is usually supplied Batt. voltage with key on. The ECM's driver controls the ground, and when grounded, activates the valve (closing it). If the ECM detects a short to ground, and open,or a short to battery voltage on the control circuit, P0446 will set. Code also may refer to ECM detecting that EVAP system is unable to achieve or maintain vacuum during test.
Symptoms There will be no obvious symptoms to driver, other than MIL illumination.
Causes A code P0446 could mean one or more of the following has happened:
  • Faulty vent valve
  • Open, short or excessive resistance on Vent valve control circuit
  • Blockage of vent valve
  • Bad PCM
Possible Solutions With a P0446 OBD-II trouble code, here are some things to try:
  • Replace Vent valve
  • Repair open, short, or resistance problem in control circuit
  • Repair open, or short, or resistance problem in power circuit
  • Replace PCM
In case of a problem or clarification or my solution was insufficient, don't hesitate to post me a reply.

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Jun 09, 2011 | 2006 Ford Escape

1 Answer

P0703


The PCM monitors changes in input voltage from the brake switch. If the PCM does not detect PCM terminal 1AU voltage changes while alternately accelerating and decelerating 8 times, the PCM determines that brake switch circuit has malfunctioned.

• Brake switch malfunction
• Poor connection of brake switch connector or PCM connector
• Short to power supply in wiring harness between brake switch terminal D and PCM connector terminal 1AU
Open circuit in wiring harness between brake switch terminal D and PCM connector terminal 1AU
• Open circuit in wiring harness between battery positive terminal and brake switch terminal A
• PCM malfunction

Do you have an immobilizer on this truck? Possible short circuit? Do you have added trailer wiring on this truck? Possible short circuit? Are your brake lights working normally? If not, is the brake light fuze OK?

Jan 04, 2011 | 2004 Dodge Ram 1500

1 Answer

On my 1998 crysler sebring I am getting OBD II codes of 40 and 41,Transmission & engine module,any suggestions where to start? Thanks.


code 40-
Possible causes - 1/1 And 2/1 O2 sensors harness circuit shorted
- 1/1 And 2/1 O2 sensors harness circuit connectors (wrong connection)
- Faulty Powertrain Control Module (PCM) P0040 CHRYSLER Description At ignition on the Powertrain Control Module (PCM) checks the voltage on the ground side of the O2 sensor harness connector. If voltage is higher than two volts the P0040 code will set. code 41- Possible causes - 1/2 And 2/2 O2 sensors harness circuit shorted
- 1/2 And 2/2 O2 sensors harness circuit connectors (wrong connection)
- Faulty Powertrain Control Module (PCM) P0041 CHRYSLER Description At ignition on the Powertrain Control Module (PCM) checks the voltage on the ground side of the O2 sensor harness connector. If voltage is higher than two volts the P0041 code will set.

Dec 01, 2010 | 1998 Chrysler Sebring

1 Answer

Timing belt busted and replaced belt, OBD 2 shows that # 3 spark plug misfires. Possibles causes # 3 valve damaged if correct plz reply


yes its possible, start by checking the spark plug and if the saprk plug wire is shorting down in the tube. if all is ok, then check compression.

Jun 27, 2010 | 2000 Hyundai Elantra

1 Answer

Thanks for your reply but the alternator is fine so is the battery & the jump fuse box all checked out ok.still have fault. i think its computer generated ie not activating the alternator to charge...


The voltage regulator is part of the pcm (powertrain control module) The pcm regulates the amount of voltage to the battery and system. The pcm will have to be replaced to correct the problem. Hope this will help you.

May 20, 2010 | Cars & Trucks

1 Answer

Thanks for your quick reply. The brake switch


I didn't see the first question ... I'm glad you were satisfied ...

No, what you describe is not normal ... the alarm should not sound when you step on the brake. You have something crossed.

BEWARE ... there are wires down there that control the air bag ... they should be specially marked ... just so you know they are there ... dont mess with them.

May 02, 2010 | 1997 Chevrolet S-10 Pickup

1 Answer

Error code 0108 2005 chevy malibu


your MAP sensor is receiving a High Input. possible causes are as follows: this means that the circuit is open or shorted to the VREF, the grounding circuit is open between the sensor and the PCM, the sensor is damaged, PCM has failed. possible causes for the sensor to fail, extended engine cranking or a backfire. I hope this helps you, thanks

Oct 06, 2009 | 2005 Chevrolet Malibu

1 Answer

A p0340 code


Code P0340... camshaft position sensor circuit fault.

Note: this is a CIRCUIT fault, meaning it may or may not be the sensor itself. It could be a wiring problem (loose, short, open), a bad pcm (computer) or the sensor itself. You can try replacing the sensor, but understand there's the possibility that it might not be the cure you hope for. If the sensor itself is not bad then you will have to do some electrical troubleshooting. Depending on your troubleshooting skills, anything beyond sensor replacement might require you to seek help from a local shop.

If this reply answers your question then please take a moment to rate this post. - Thanks.

Jun 30, 2009 | 2001 Ford Mustang

1 Answer

A p0340 trouble code and i changed the cam position sensor and all 4 o2 sensor's on a 01 ford mustang gt with a 4.6


Code P0340 is a camshaft position sensor CIRCUIT fault. This means it can be a bad sensor, wiring fault (loose connector, short, open), or even a bad PCM. Since you've already changed the camshaft position sensor you've eliminated that possibility. It's time to do some electrical troubleshooting. That, of course, depends upon your skill set for this type of work and equipment (mostly a good dmm and schematics). If you're not equipped for this then you'll likely have to seek assistance from a local shop.

If this reply answers your question then please take a moment to rate this post. - Thanks.

Jun 30, 2009 | 2001 Ford Mustang

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