Scary Codes
Thread Starter
Instructor
Joined: Feb 2003
Posts: 163
Likes: 0
From: Haworth NJ
Scary Codes
Car would not start yesterday... no crank at all, but full Battery power... and I'm thinking DB... not after three years.... so end up getting it towed to the dealer.... Codes P0335 and P0340 - scary codes the dealer says could be a CAM problem or Manfold....
You would think this could be simpler
In case any of you run into this, I thought you might want to know...
- They call GM - solution 1 - replace main computer...
24 hour later - same problem - Call GM - Solution 2 - replace Starter....
24 hours later - This works.
You would think this could be simpler
In case any of you run into this, I thought you might want to know...
Safety Car
Joined: Feb 2007
Posts: 4,939
Likes: 448
From: CHOCOWINITY NC
Odd...A google search shows:
If the vehicle has any of the crank sensor codes P0335, P0336, P0385, or P0386 set, then the following should be done:
• Inspect both of the crank sensor terminals for signs of poor connection or corrosion of both crank sensors. Pin drag test all four terminals.
• Inspect the crank sensor circuit wires for signs of damage.
• Inspect the crank sensor circuits at the PCM for poor connections. The crank sensor terminals should also be drag tested.
• Remove the crank sensors and check for any debris on the sensor.
• Verify crank sensor location (A on the bottom and B on the top) and verify that the sensor circuit wires are in the correct cavities.
• Inspect the date code on the sensor. If it is before 0276, replace the crank shaft sensor and perform case learn.
• If the date code is past 0276, verify the PCM grounds. A voltage drop test should be less than 20 mV.
• If the PCM ground circuit verification is acceptable, then follow published PCM diagnostics.
If the vehicle has any of the crank sensor codes P0335, P0336, P0385, or P0386 set, then the following should be done:
• Inspect both of the crank sensor terminals for signs of poor connection or corrosion of both crank sensors. Pin drag test all four terminals.
• Inspect the crank sensor circuit wires for signs of damage.
• Inspect the crank sensor circuits at the PCM for poor connections. The crank sensor terminals should also be drag tested.
• Remove the crank sensors and check for any debris on the sensor.
• Verify crank sensor location (A on the bottom and B on the top) and verify that the sensor circuit wires are in the correct cavities.
• Inspect the date code on the sensor. If it is before 0276, replace the crank shaft sensor and perform case learn.
• If the date code is past 0276, verify the PCM grounds. A voltage drop test should be less than 20 mV.
• If the PCM ground circuit verification is acceptable, then follow published PCM diagnostics.
Thread Starter
Instructor
Joined: Feb 2003
Posts: 163
Likes: 0
From: Haworth NJ
They did the inspection of the PCM connections etc when they replaced the main computer, as the leads were fine and the scope showed good data so they thought it was a computer problem...
I am glad I bought the extended warranty... this was at 56k miles (daily ride)
I am glad I bought the extended warranty... this was at 56k miles (daily ride)
Me too!
