Hi,
The knock sensors manipulate timing. Did you replace both or only one? Also, the transmission could be causing an issue as well. When you day a delayed shift, is it slipping or does it just seem to take longer to shift?
Next, when I think of power loss, one of the first things that comes to mind is a partially plugged catalytic converter. Are there any odd sounds or odors coming from the exhaust?
The other thing to consider is the signal plate on the crankshaft. The NE signal plate has 12 teeth and is mounted on the crankshaft. The NE signal sensor generates 12 NE signals per engine revolution. The engine control module detects the standard crankshaft angle based on the G1, G2 signals, and the actual crankshaft angle, and the engine speed by the NE signals. It could be loose or damaged. Have you checked it?
Also, according to my manual, DTC51 is a switching-related issue. I attached the information below along with diagnostics. Let me know if you are finding something different.
Let me know.
Joe
See pics below.
Images (Click to enlarge)
Jul 27, 2023 at 9:39 PM
