P1696 Pcm Failure Eeprom Write Denied

There are a few things that can cause this. The first is if the PCM isn’t getting power, which can be caused by a blown fuse or a bad connection. The second is if the ground wire to the PCM is loose or damaged.

The third is if the battery voltage is low. If any of these are the case, then the PCM will need to be replaced.

If you’re driving a late-model car or truck, chances are good that it has an on-board computer, commonly called the powertrain control module (PCM). This little black box controls everything from the engine and transmission to the anti-lock brakes and traction control system. In short, it’s responsible for keeping your vehicle running smoothly.

Unfortunately, sometimes these PCMs can fail, leaving you stranded on the side of the road. One of the most common failures is known as the P1696 code, which indicates that the PCM is unable to write to the EEPROM (electrically erasable programmable read-only memory). This can be caused by a number of things, including a faulty connection or damaged wiring.

If you find yourself facing this problem, don’t panic! There are a few things you can do to try and fix it. First, check all of the connections to make sure they’re tight and free of corrosion.

Next, take a look at the wiring harness for any signs of damage. If everything looks good there, then your best bet is to take your car or truck to a qualified technician who can diagnose and repair the problem quickly and efficiently.

P1696 Pcm Failure Eeprom Write Denied

Q: What is P1696

P1696 is a powertrain diagnostic trouble code (DTC) for “Engine Misfire Detected – Rough Idle.” This code indicates that the engine’s computer has detected an engine misfire. The most common cause of an engine misfire is a spark plug that has failed or become fouled.

Other causes could include a fuel injector that is not working properly, a vacuum leak, or an ignition coil that has failed.

Q: Why Would the Eeprom Write Be Denied

There are a few reasons why the EEPROM write might be denied. The most likely reason is that the device is either not connected to the EEPROM or the wrong type of EEPROM is being used. Another possibility is that the power supply to the EEPROM is insufficient or interrupted.

Q: How Can I Fix This Problem

If you’re experiencing a problem with your computer, there are a few things you can try to fix it yourself. First, restart your computer and see if that solves the problem. If not, try running a virus scan to see if there are any malicious programs causing the issue.

Sometimes simply updating your drivers can solve the problem as well. If you’re still having trouble, you can contact a computer technician for help.

Otherwise, You May Need to Replace the Module Entirely

If your car’s check engine light is on, there’s a good chance that the problem lies with the mass airflow sensor (MAS). The MAS is responsible for detecting the amount of air flowing into the engine so that the ECU can properly adjust fuel delivery. If it senses that there’s not enough air, it’ll deliver too much fuel and vice versa.

This can lead to all sorts of problems, from decreased fuel economy to loss of power. Fortunately, you don’t always have to replace the MAS when the check engine light comes on. First, try cleaning it with some carburetor cleaner.

If that doesn’t work, you may need to replace the filter. If neither of those things does the trick, then you’re probably looking at replacing the entire MAS assembly.

How to bypass SKIM immobilize on a Jeep Grand Cherokee 1999 to 2004


If your GM vehicle won’t start and you’ve been told that you have a PCM failure, there’s some good news and some bad news. The good news is that there is a TSB (technical service bulletin) from GM that says to replace the PCM with an updated unit.

The bad news is that the TSB also says that this updated PCM may not fix the problem and you may need to have the car towed to a dealer for further diagnosis.