2002 Ford F150 SuperCrew P0356, P1000, P1635 Codes: Rough Idle & No Acceleration After Coil Replacement
I'm frustrated with my 2002 Ford F150 SuperCrew equipped with a 4.6L Triton V8 engine. I've been experiencing persistent rough idle and lack of acceleration. I took the truck to a mechanic who replaced the ignition coils for the third time, believing it would resolve the issue. However, after driving home, the problem remained—and now my vehicle displays three Diagnostic Trouble Codes (DTCs): P0356, P1000, and P1635. These codes were not present before the repair. I understand what P0356 and P1000 mean based on online references, but I'm confused about the meaning of 'tire/axle out of acceptable range' in the P1635 code. What exactly is failing or misbehaving in this case? My truck has 73,000 miles. The last oil change was performed 300 miles ago with a clean filter installed. I'm seeking clarity on how to diagnose and fix these codes, especially the P1635 issue.
First, confirm whether your 2002 F150 has a coil pack or individual coil-on-plug (COP) ignition system. If it's a coil pack design, each cylinder is connected via plug wires. Did the shop perform a full tune-up during the service? For P0356—related to a faulty spark plug circuit—the best diagnostic step is using a digital volt/ohm meter (DVOM) to check for open or short circuits in the coil driver wiring. As for P1635, which indicates a 'tire/axle out of acceptable range,' this typically stems from an incorrect calibration in the Powertrain Control Module (PCM). The most reliable fix is visiting a Ford dealership to have the Vehicle Identification Data (VID) reprogrammed—this updates the PCM's calibration file. Regarding P1000, it appears when all required system monitors haven't passed. Resolving underlying issues like misfires or sensor faults and completing an OBD-II drive cycle should clear this code.