Error Codes P0117 and P1229 - 1997 XK8 won't stay running
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Error Codes P0117 and P1229 - 1997 XK8 won't stay running
Has anyone experienced a car that performed perfectly one day, then the next the car won't stay running? Error codes P0117 and P1229, dash warnings: Engine Fault, Stability Control Failure, Poor vehicle performance.
Additional info: Drove the car from AZ to Chicago without a hitch. 2 days later on a local trip, car shudders and dies. Will restart and will run briefly, then start running rough and eventually quits.
Because of P0117 error, replaced the coolant temp sensor. No difference. P1229 code indicates throttle body circuit problem. Disconnected all wire harnesses, sprayed with electrical connection cleaner, reassembled. No better.
Finally replaced the Throttle Body with one from identical car which was running perfectly. No better.
Any ideas greatly appreciated.
Additional info: Drove the car from AZ to Chicago without a hitch. 2 days later on a local trip, car shudders and dies. Will restart and will run briefly, then start running rough and eventually quits.
Because of P0117 error, replaced the coolant temp sensor. No difference. P1229 code indicates throttle body circuit problem. Disconnected all wire harnesses, sprayed with electrical connection cleaner, reassembled. No better.
Finally replaced the Throttle Body with one from identical car which was running perfectly. No better.
Any ideas greatly appreciated.
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UPDATE: Cleaned and rechecked all wiring harnesses to no avail. Brought to a local shop which works on imports. Everything checked out okay so they looked at the ECM. It had 3 blackened spots on the circuit board. Purchased a replacement from Specialized ECU Repair in Oakland Park, FL. For the '97 XK8 it's plug in and play, no reprogramming. Swapped out the ECM's and runs perfectly. Not sure of the cause? Cost was $350 for the ECM.
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