Question about 2008 Chevrolet Express
2 days turned over didn't start but started o.k. about an hr. later. this morning started first time.pulled codes po25a and po69e.
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Posted on Jan 02, 2017
Does your security light flash if you turn your key to the 'on' position? If so, this is a Passlock problem. It should restart after 10 minutes. Here`s a possible solution that has worked for me. Have a new key cut from origional key or best condition key you have. Buy some Electronic cleaner and spray lots into the lock cylinder. Then, put your key in the ignition and turn from off to on position several times (5 to 10 times quickly). Then remove your key and spray again and repeat key turning. Do this several times. I don`t recomend any spray that is oil based. I no longer have issues with my Passlock system and I have almost 500 000Kms on my Impala.
Posted on Jul 11, 2010
SOURCE: I just bought a 2003
Hello, I read your problem, and a lot of the symptoms you are describing seem like itmis possible, that you have a bad 02 sensor, this is part of your emissions, relating to the cadilac converter, it mostly acts up at lower speeds, like coming to a stop or slowing to make a corner. Sometimes also a bad fuel filter could cause this when rpms are down such as slowing or on corners. That is the two things I would check. Thanks mike
Posted on Sep 05, 2011
Trouble Code: P1336
CKP Sensor System Variation Not Learned
Set the parking brake and block the drive wheels for safety. Verify the hood is closed. Read the trouble codes. If a code is set, refer to that code. Start the engine. Allow engine temperature to reach at least 158?F (70?C). Then key off. Select Crankshaft Position Variation Learn procedure on Scan Tool & start the vehicle. Apply the brake pedal firmly and verify the selector is in Park. Increase accelerator pedal position until fuel cutoff is reached at the test rpm (e.g., 5150). Quickly release the accelerator pedal after fuel cutoff is reached. The CKP system variation compensating values are learned when the engine speed (rpm) decreases back to idle speed and the procedure terminates. Read the trouble codes and recheck for DTC P1336. If DTC P1336 runs and passes, the CKP system variation "learn" procedure is complete. If not, look for other codes. If no codes are set, repeat the test procedure.
Posted on Jul 24, 2012
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