| ID | Status | Date | Year | Make | Model | Transmission Type | A/C Controls | Public/Private |
|---|---|---|---|---|---|---|---|---|
| #13798 | Closed | 2007 | Chevrolet | Tahoe | public |
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I have read your answers regarding a 2007 GMC Yukon multiple misfires codes; P0300, P302, P0304, P0306 and P0308. My car has exactly the same symptoms as it was described in the answer. However, the codes that I’m getting are P300, P301, P303, P305 and P307. I have located the G200 on my engine block and will attempt to look for any short in the ground wire(s). My car was running poorly the night before as I parked it to get to it today. This morning. I tried to start the car to move and work on the problem but the car does not even start! Another thing I noticed that the car keeps on starting for a few seconds even if I let go of the key!! Please advise… |
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The starter continuing to work after letting go of the key is normal for your vehicle. Turning the key to the start position merely sends a signal to the BCM and then the PCM that a crank condition has been requested. The computers can keep the starter engaged up to thirty seconds with no further input from the driver. The article I wrote about misfires concerning the G200 connector had ignition coil control malfunction codes P0352, P0354, P0356 and P0358. Those types of codes are very different from P0302, P0304, P0306 and P0308. A P0352 indicates that the computer cannot control the coil due to a missing electrical input. A P0302 would indicate that the coil control circuit is functioning from the computers perspective but that proper combustion is not occurring in the #2 cylinder all of the time. There could still be an issue with the G200 connection but the misfires could be caused by a lot of other things as well. |
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I sincerely apologize for my mistakes as I just realized that I got my codes mixed up. You are absolutely correct!! Your article was for P0352, P0354,… and I’m getting P0351, P0353, P0355, P0357. I’m sorry that I got those numbers mixed up. I never got the other codes!!! I would appreciate your input if there is anything to add to your previous reply. |
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Because you do have the same general codes except for yours applying to bank one you may want to focus in on the following paragraph from that article. “Since the P0352, P0354, P0356 & P0358 codes have to deal with the coil control circuits for all of the bank two ignition coils, I started by checking the basic power and ground supplies to the bank two ignition coils. There was no problem with the voltage signal on the red wires at the harness terminal position “A”. Checking the ground circuit on the black wire at the harness terminal position “D” yielded a varying voltage reading of between .120 and 6 volts depending on how well or how poorly the engine was running. When the ground signal was relatively okay at .120 volts the engine would run okay. As the voltage on this wire rose the engine would start running worse. As a quick confirmation test, I piggybacked a good ground into this circuit to prove that repairing the faulty ground would indeed fix the customer’s complaint.” |
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Thank you for your reply. I will follow the directions in the paragraph but currently, the engine does not start! As a reminder, the engine was running intermittently poor after getting warmed up the night before. Next morning, she does not start! I checked all the fuses and relays in the fuse box in the engine bay and did not find any problem there. Is there any other component need to be tested? |
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Does the engine crank over but will not run or is the starter also not working? |
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Yes, the engine cranks over but it does not start running. |