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REMANUFACTURED INJECTORDiesel Fuel Injectors
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12-Month Warranty
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RHK Injector Problems – Symptoms, Causes & Fixes

Engine: RHK 1 compatible injectors From £90

Common Injector Failures on the RHK

The RHK engine uses high-pressure common rail diesel injection. Over time, injector nozzles wear, seals degrade, and internal components lose calibration. This leads to a range of drivability symptoms that worsen if left unaddressed. We stock 1 tested replacement injectors for this engine from Siemens VDO / Continental.

Vehicles fitted with the RHK include models from Citroen, Ford, Peugeot, Volvo. If you are experiencing any of the symptoms below, your injectors may need testing or replacement.

Symptoms of Injector Failure

Black Smoke
White Smoke
Rough Idle
Hard Starting
Engine Knock

Related Fault Codes

P0201P0202P0203P0204P0263P0266P0269P0087P0089P0300

How to Test RHK Injectors

Leak-off test: Connect clear hoses to the injector return lines and compare fuel volumes at idle. The injector returning the most fuel is likely worn.

Correction values: Use a scan tool to read injector correction (IMA) values. Readings beyond ±3 mg/stroke indicate wear.

Resistance check: Measure resistance across the injector connector pins with a multimeter. Compare to manufacturer specs.

Complete Testing Guide Leak-Off Test Guide

RHK Injector Replacement Cost

Parts (per injector)

£90–£90

Labour

£150–£400

Total (per injector)

£240–£490

Full replacement cost guide

Compatible Injectors for the RHK1 found

5WS40156-Z
5WS40156-ZSiemens VDO / Continental
£90.00

Most Common Injector Part Numbers for RHK Engine

5WS40156-Z
5WS40156-ZSiemens VDO / Continental
£90.001 vehicle

Related Cross Reference Numbers for RHK

5WS401565WS40156-Z5WS40156ZA2C59511601

Vehicles Using the RHK Engine

Peugeot 307RHK
Peugeot 407RHK
Citroen C4RHK
Ford MondeoRHK
Ford S-MaxRHK
Volvo S40RHK

Related Engine Codes

D4204T D4204T2 QXBB QXWA QXWB QXWC

Frequently Asked Questions

What are common injector problems on the RHK engine?
The RHK engine commonly suffers from injector seal failure, nozzle wear causing poor spray patterns, and back-leak issues. Symptoms include rough idle, black or white exhaust smoke, hard starting, and increased fuel consumption. These issues typically appear after 100,000–150,000 miles.
How much does it cost to replace injectors on a RHK engine?
A remanufactured injector for the RHK engine typically costs £90–£90 per injector. Labour adds £150–£400 depending on accessibility. We found 1 compatible injectors for this engine.
Which vehicles use the RHK engine?
The RHK engine is found in vehicles from Citroen, Ford, Peugeot, Volvo. Common models include Citroen C4, Ford Mondeo, Ford S-Max, Peugeot 307, Peugeot 407.
How do I test the injectors on a RHK engine?
Perform a leak-off test by connecting clear hoses to each injector return line and comparing fuel volumes at idle. You can also check injector correction values with a diagnostic scan tool or measure electrical resistance with a multimeter.

Injector Compatibility Checker

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Diagnostic Guides

Need a Replacement RHK Injector?

We stock 1 tested replacement injectors for the RHK engine. All remanufactured, bench-tested, and supplied with a 12-month warranty.

View All InjectorsReplacement Cost Guide Call 020 3355 6581