Acura P1658: Electronic Throttle Control System (ETCS) Control Relay ON Malfunction

Is your scanner showing Acura P1658?
No worries. We'll show you what it means and how to deal with it.

Presented by

Randy Worner

00:00/00:00

Acura P1658: Electronic Throttle Control System (ETCS) Control Relay ON Malfunction

OVERVIEW

Severity

High

DIY Difficulty Level

Intermediate

Repair Cost

$100-$250

Can I Still Drive?

Yes

What Does The Acura P1658 Code Mean?

The communication signal is input from the throttle actuator control module for at least 2 seconds, after the throttle actuator control module relay is turned off.

The execution time is once per driving cycle. DTCs P0122, P0123, P0222, P0223, P1659, P2101, P2118, P2122, P2123, P2127, P2128, P2135, P2138, P2176 are not active.

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot.

What Are The Potential Causes Of The Acura P1658 Code?

Poor connections or loose terminals at the under-hood fuse/relay box (ETCS control relay) and the PCM
“Short” in the wire between the PCM and the under-hood fuse/relay box (ETCS control relay)
“Short” to power in the wire between the PCM and the under-hood fuse/relay box (ETCS control relay)
Faulty relay control module (under-hood fuse/relay box)
PCM needs to be updated with the latest software
Faulty PCM