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ZPJ —
the 605 and XM's 3.0

The ZPJ is PSA's reading of the 3.0 litre 12-valve: 2,975 cc, bore × stroke 93 × 73 mm, 9.5 compression ratio, 170 bhp DIN at 5,600 rpm. One engine for the Peugeot 605 and the Citroën XM — Peugeot codes apply group-wide — which a Douvrin cousin, Renault's Z7X, matches displacement for displacement.

2 975
CC
170
BHP
2
MARQUES
PSA's 3.0

One engine, two lions — and a chevron

In the 605 era Peugeot struck only one code for two marques: the 605's ZPJ is the XM V6's, identically — Citroën Technical Note no. 4 says so in as many words about the S6A version to 15-04 standards for export: “the engine is identical to the ZPJ, only the engine number changes”. Fenix 3B injection, 750 rpm idle governed by a solenoid valve, mapped ignition: nothing is adjusted by hand.

Its displacement is exactly that of the Alpine A610's Z7X-744 and of the American 3.0 in the Eagle Premier and Dodge Monaco: 2,975 cc. And it is on its block that PSA built, from 1990, the 200 bhp 24-valve ZPJ4 with ACAV variable intake — 62-link chains instead of 64, its own heads and timing. After 1997 a 60° “PR” V6, the ES9, replaces the PRV on the 605 and XM: that engine is not here.

ZPJ
PSA CODE · 2,975 CC · FENIX 3B INJECTION · 12 VALVES
2975
CC
170
BHP
12
VALVES
Identity

What makes a ZPJ a ZPJ

Figures read in the constructor's documents held in our Library — repair manuals, Pub et Trade data sheets, period bulletins. Nothing here comes from a web fact sheet.

ZPJ 2,975 cc · 12 valves · Fenix 3B · third generation Technical Note no. 4 →
93 × 73
2,975 cc, 93 mm bore × 73 mm stroke, 9.5 compression ratio — 123 kW EEC, i.e. 170 bhp DIN at 5,600 rpm, and 24.5 m.kg DIN at 4,600 rpm. The XM's S6A version to 15-04 standards is identical, only the engine number changes.
750 tr/min
Non-adjustable idle: about 750 rpm with the engine warm, set by the idle solenoid valve driven by the ECU — do not touch the throttle stop screw. Nor is the ignition: the timing is defined by the Fenix 3B map.
Bougies
Flat-seat Eyquem RFC 58 LS3, gap 1 ± 0.1 mm, torque 1.5 mdaN. And no cylinder-head retorque at 1,500 km — the Technical Note is explicit.
Boucle ouverte
The XM V6 to 15-04 standards runs without an oxygen sensor, in open loop: its Fenix 3B is specific, and mixture is set with the Bendix potentiometer in the electronics box.
64 maillons
64-link timing chains — the 24-valve ZPJ4, for its part, has 62 and its own guide arrangement.
Known variants

One code for two marques

The same 12-valve at Peugeot and at Citroën — the full code table is on the Engines page.

ZPJ 167 to 170 bhp Every known code →
ZPJ167–170 bhp
Fenix 3B injection12-valve
Peugeot 605 SR and SV 3.0 V6 · Citroën XM V6 — 167 to 170 bhp; S6A for the XM to 15-04 standards.
On the road

The cars of the ZPJ

Peugeot 605 V6 →

605 SR and SV 3.0 V6: the 170 bhp ZPJ, with its Pub et Trade workshop sheet in the Library.

Citroën XM V6 →

The XM V6: the same ZPJ — and Technical Note no. 4 on its S6A version, with the Fenix 3B's full diagnostic tree.

In the workshop

What the documents say about the ZPJ

Answers taken from our FAQ, each one read in the Library. The full FAQ holds several hundred more, engine code by engine code.

The ZPJ, in the documents The full FAQ →
S6A
What is the S6A engine of the Citroën XM V6?
The three-litre 12-valve PRV V6 of the XM in its 15-04 standard form, built for export outside the stricter emission markets. Same dimensions as the ZPJ — 93 mm bore, 73 mm stroke, 2,975 cc, 9.5:1 compression — for 123 kW EEC, that is 170 bhp DIN at 5,600 rpm, and 24.5 m.kg DIN at 4,600 rpm. Citroën Technical Note no. 4 is explicit: the engine is identical to the ZPJ, only the engine number differs.
Ralenti
Can the idle be adjusted on a 15-04 Citroën XM V6?
No. Idle speed is set by the ECU-controlled idle valve at about 750 rpm when hot. The note says it in capitals: do not touch the throttle stop screw. Ignition is not adjustable either — timing comes from the map programmed into the ECU.
Codes défaut
How do I read the fault codes of a Citroën XM V6 with Fenix 3B injection?
With the 4097 T decoder or a Citroën 26 A station plugged into the green self-diagnosis socket: the ECU stores faults and reads them back as codes. Citroën Technical Note no. 4 lists them all — 12 sequence start, 11 sequence end, 13 air temperature, 14 water temperature, 15 fuel pump relay, 21 throttle potentiometer, 33 absolute pressure sensor, 56 coded immobiliser — then two pages of methodical tables giving, code by code, what to check, where, and to what value. One warning the note prints in capitals: cutting the ECU's power supply erases the stored list, resets the adaptive corrections and arms the immobiliser.
Eagle
What is the exact capacity of the Eagle Premier's PRV, and its power?
2,975 cc — 180 cubic inches —, 93 mm bore, 73 mm stroke, 9.3 compression ratio. Exactly the capacity of the A610's Z7X-744 and the 605 and XM's ZPJ. Power: 150 hp at 5,000 rpm, torque 232 N·m (171 ft-lbs) at 3,750. ⚠️ Note that the two Chrysler documents do not give the same capacity: the service manual writes “3.0 LITER (182 CU. INCH)” at folio 9-2, the overhaul book “180 CU. IN. (2975 cc)”. Arithmetic settles it — 93 × 73 over six cylinders is indeed 2,975 cc, that is 181.6 cubic inches. Chrysler overhaul book, page 3; 1990 service manual, folio 9-2.

In the Library

PSA's 3.0 12-valve documents, searchable page by page: ZPJ workshop sheet — Peugeot 605 SR and SV, 170 bhp · ZPJ/SFZ workshop sheet — Citroën XM V6, 170 bhp · Citroën Technical Note no. 4 — XM V6 S6A

The rest of the family

Architecture, generations and every known engine code of the PRV V6 — on the main Engines page.

ZPJ4 — the 24-valve →Z7X — the 3.0 at Renault → All PRV engines →