P1774 on Infiniti

Low coast brake solenoid valve function fault in a Nissan or Infiniti RE5R05A 5-speed automatic

Severity: Severity not verified — if the car runs badly, have it inspected

Owners report clanking, dropping to first gear and a burning smell with this code, but we found no source that says how far it is safe to drive.

It gets more serious if:

Inspect soon: The transmission drops into one gear, clanks, slips or smells burnt.

This page covers only what differs on Infiniti. For what P1774 means, the ranked causes and the test order, see the P1774 guide.

2004 · QX56
Supported by vehicle data
Infiniti bulletin 04047 covers a 2004 QX56 with the MIL on and P1774.
2005 · FX35
Supported by vehicle data
Infiniti bulletin ITB-10-006A lists P1774 for RE5R05A 5-speed automatics, including the FX35.

ITB-10-006AStatus unverified
INFINITI: 5 SPEED A/T DTC DIAGNOSES FOR P1701, P1702, P1703, P1704, P1705, P1754, P1759, P1764, P1769, P1774.
2003–2010ex35, fx, fx35, fx45, g35, g37, i30, i35, infiniti, j30, m, m35, m45, q45, qx4, qx56 · issued July 29, 2010 · NHTSA 10033227
Lists P1774 with other RE5R05A 5-speed automatic codes and points to a repair flow chart, or reports the MIL on with P1774. Only the NHTSA flat-file summary was read, not the bulletin itself.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
04047Status unverified
MALFUNCTION INDICATOR LAMP (MIL) ON WITH DIAGNOSTIC TROUBLE CODE (DTC) P1774.
2004qx56 · issued November 5, 2004 · NHTSA 10010174
Lists P1774 with other RE5R05A 5-speed automatic codes and points to a repair flow chart, or reports the MIL on with P1774. Only the NHTSA flat-file summary was read, not the bulletin itself.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Infiniti bulletin 04047: MIL on with P1774 — Infiniti (Nissan North America) , November 5, 2004
Infiniti ITB-10-006A: 5-speed automatic DTC diagnoses (RE5R05A) — Infiniti (Nissan North America) , July 29, 2010
RE5R05A Trouble Code Chart — Sonnax Transmission Company , January 1, 2013
NHTSA complaint 1504451: 2007 Nissan Pathfinder, P1774 — NHTSA (owner complaint)
NHTSA complaint 1383999: 2008 Nissan Pathfinder, P1774 low coast brake — NHTSA (owner complaint)

This page explains what a code usually means; it is not a substitute for a professional inspection. How we source and review · Report an error