The Honda Code P1659 is a diagnostic trouble code that occurs when the Electronic Throttle Control System (ETCS) Control Relay OFF Malfunction is detected. This code is triggered when the ignition switch is ON (II), the battery voltage is 10 volts minimum, and the diagnostic trouble codes P0122, P0123, P0222, P0223, P2101, P2118, P2122, P2123, P2127, P2128, P2135, P2138, P2176 are not active. It is imperative to record all freeze data and any on-board snapshot before attempting to troubleshoot this code. The cause of the error is due to several factors, such as a blown fuse, poor connections or loose terminals at the under-hood fuse/relay box (ETCS control relay) and the PCM, an “Open” or “Short” in the wire between the PCM and the under-hood fuse/relay box, a faulty right side engine compartment wire harness, a faulty relay control module (under-hood fuse/relay box), a PCM that needs to be updated with the latest software, or a faulty PCM.
Causes and Solutions of Honda Code P1659
| Cause | Solution |
|---|---|
| Blown Fuse | Replace the fuse. |
| Poor Connections or Loose Terminals at the Under-hood Fuse/Relay Box (ETCS Control Relay) and the PCM | Tighten the connections and terminals. |
| Open or Short in the Wire Between the PCM and the Under-hood Fuse/Relay Box | Diagnose and repair the wire. |
| Faulty Right Side Engine Compartment Wire Harness | Replace the faulty wire harness. |
Blown Fuse
The Honda Code P1659 is triggered when a blown fuse is detected. This can cause the Electronic Throttle Control System (ETCS) Control Relay OFF Malfunction. The solution to this problem is to replace the fuse.
Poor Connections or Loose Terminals
This code can also be triggered when there are poor connections or loose terminals at the under-hood fuse/relay box (ETCS control relay) and the PCM. To fix this issue, the connections and terminals should be tightened.
Open or Short in the Wire
An open or short in the wire between the PCM and the under-hood fuse/relay box can cause the Honda Code P1659. To repair this, the wire needs to be diagnosed and repaired.
Faulty Right Side Engine Compartment Wire Harness
Honda Code P1659 can be caused by a faulty right side engine compartment wire harness. To fix this, the faulty wire harness needs to be replaced.
Conclusion
The Honda Code P1659 can be caused by several different issues, such as a blown fuse, poor connections or loose terminals at the under-hood fuse/relay box (ETCS control relay) and the PCM, an “Open” or “Short” in the wire between the PCM and the under-hood fuse/relay box, or a faulty right side engine compartment wire harness. To address each issue, the corresponding solution must be employed. By following the solutions listed in this article, drivers can easily fix the Honda Code P1659 and get back on the road.
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