Is it safe to drive with this code?

Driving with P045E may result in reduced performance, poor fuel economy, and potentially increased emissions; while it may not cause immediate breakdown, the issue can lead to further engine stress if ignored, so assessment by a technician is advisable (see our disclaimer).

P045E may affect MOT eligibility if the malfunction indicator lamp (check engine light) is illuminated at the time of test; the emissions system is also assessed, though the outcome depends on actual emissions readings (see our disclaimer).

Roughly how much does it cost to fix?

Repair costs typically fall in the low to mid three-figure range, though this varies widely; a simple cleaning of carbon deposits may cost low three-figure, whilst a replacement EGR valve plus labour can reach mid three-figure at an independent garage or higher at a main dealer.

Can I clean the EGR valve instead of replacing it?

In many cases carbon fouling can be cleaned if caught early, potentially saving on parts costs; however, if the valve itself is mechanically worn or the solenoid has failed, replacement is often necessary for a reliable repair.

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← All fault codes | Emissions

P045E

Powertrain

Exhaust Gas Recirculation B Control Stuck Open

The engine control module has detected that the exhaust gas recirculation valve for bank B appears to be stuck in the open position, potentially allowing excessive exhaust gas back into the intake.

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ⓘ Information only. This page provides general educational information about fault code P045E. We do not assess the urgency or safety implications of any specific fault. That requires in-person diagnosis by a qualified mechanic. Full terms.

Recommended next steps

Whether a fault is urgent, drivable, or routine depends entirely on the cause on a specific vehicle, and that can only be determined by a qualified mechanic with diagnostic equipment. If a warning light is illuminated, the most reliable next step is professional diagnosis.

What does P045E mean?

P045E is a Powertrain (engine, transmission, fuel system) fault code. It indicates: Exhaust Gas Recirculation B Control Stuck Open.

This is a standardised OBD-II code. The technical definition is the same regardless of the make or model of vehicle, although specific causes and symptoms can vary between vehicles.

About Emissions codes

Emissions codes relate to systems that control or monitor exhaust gas composition, catalytic converters, oxygen sensors, exhaust gas recirculation (EGR), and the evaporative emissions (EVAP) system. These rarely affect drivability dramatically but can cause MOT failures.

P045E is one of 258 codes in this category. Browse all Emissions codes →

What we know about P045E specifically

We record the SAE J2012 standardised definition and the system this code belongs to, but we have not yet published detailed driver-reported symptoms, common causes, or step-by-step diagnostic guidance for P045E.

Rather than invent that information by generating generic content from a template, we leave it out. For specific guidance, the most reliable sources are:

•your vehicle's own service manual or manufacturer-specific technical bulletins
•a qualified mechanic with a manufacturer-level diagnostic tool
•a marque specialist familiar with your make and model

Codes nearby

Codes adjacent to P045E in the P-code series. Many fault codes appear together with their neighbours because they relate to the same circuit or component.

P045B Exhaust Gas Recirculation "B" Control Circuit Range/Performance

P045C Exhaust Gas Recirculation "B" Control Circuit Low

P045D Exhaust Gas Recirculation "B" Control Circuit High

P045F Exhaust Gas Recirculation B Control Stuck Closed

P0460 Fuel Level Sensor Circuit Malfunction

P0461 Fuel Level Sensor Circuit Range/Performance

Other Emissions codes

Other fault codes in the same system as P045E. The ones with detailed guides have plain-English explanations, symptoms, causes, and diagnostic steps.

P0401

EGR Flow Insufficient Detected Detailed guide

P0402

EGR Flow Excessive Detected Detailed guide

P0403

EGR Circuit Malfunction Detailed guide

P0404

EGR Circuit Range/Performance Detailed guide

P0405

EGR Sensor A Circuit Low Detailed guide

P0420

Catalyst System Efficiency Below Threshold (Bank 1) Detailed guide

Spotted an issue or have something to add? Mechanics, technicians, and drivers who have first-hand experience with P045E can submit a correction or expansion. We review every submission before publishing, mechanic submissions are prioritised.

Information only, not professional advice

The information on this page is provided for general guidance and educational purposes only. It is not a substitute for diagnosis or repair advice from a qualified mechanic. Always verify any fault before paying for repairs. carfaultcodes.co.uk accepts no liability for decisions made based on this information. Full terms →

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