The Powertrain Control Module (PCM) has detected that the calibration data, serial number, or electrical identification code for the cylinder 10 fuel injector does not match the values stored in its memory. This usually occurs when a replacement injector has not been properly programmed to the computer, the injector’s internal memory is faulty, or there is a communication interruption on the data line.
When a new injector is installed, its specific calibration codes must be entered into the PCM; skipping this step causes a data mismatch.
The injector contains a memory chip that stores its unique characteristics; if this chip fails, the PCM cannot read valid data.
Corrosion, opens, or shorts in the serial communication circuit (often LIN bus) between the injector and PCM prevent proper data exchange.
Rarely, a software glitch or outdated calibration causes the PCM to misread valid injector data; a reflash may resolve it.
Very uncommon; the PCM’s internal driver or memory for injector data is defective only after verifying all other causes.
Almost never. This code specifically indicates a data mismatch for one injector, which is almost always caused by an unprogrammed replacement injector, a faulty injector, or wiring issues. PCM replacement is a last resort after confirming the injector and wiring are correct.
Many modern fuel injectors contain digital calibration data that must be transferred to the PCM. If the technician did not program the new injector’s specific codes into the computer, the PCM will flag the data as incompatible.
Clearing the code will not resolve the underlying data mismatch. The vehicle will likely continue to run poorly, and the code will return immediately or shortly after, potentially causing long-term catalyst damage from misfires.
P2695 is specifically an electrical/data compatibility issue concerning the injector’s identification or calibration memory, not mechanical wear like a clogged nozzle or stuck pintle.