Fault code P1614 – a step-by-step guide to diagnosing and fixing it

The meaning of error code P1614 – SBDS Interactive Codes

P1614: Causes, signs and repairs

Error code P1614 is displayed and the check engine light is on - what does this mean?

The DTC P1614 is recognized by the OBD/EOBD system if there is a problem with the immobilizer or the engine control unit. This manufacturer-specific trouble code mainly concerns the communication system between the immobilizer and the ECU. The exact meaning of this fault code can vary for different manufacturers.

What causes can this fault code have?

Defective immobilizer
Damaged engine control unit (ECU)
Faulty cable connections between immobilizer and ECU
Defective ignition key or transponder
Corroded or loose plug connections
Software error in the control unit
Defective immobilizer antenna
Voltage problems in the vehicle electrics

What symptoms occur in parallel with fault code P1614?

Starting problems: The vehicle cannot be started or only starts sporadically
Immobilizer active: The immobilizer completely prevents the engine from starting
Flashing indicator lights: Immobilizer light flashes continuously
No fuel supply: The engine turns but does not start
Communication error: Diagnostic tools cannot communicate with the ECU
Intermittent problems: Vehicle sometimes starts, sometimes does not

How to fix the problem of error code P1614?

Repairing the P1614 fault code requires a systematic approach to diagnosis and rectification.
Check the key and transponder: Test all available keys and have a new key programmed if necessary
Check cable connections: Check all connections between the immobilizer and engine control unit for damage, corrosion or loose contacts and repair them
Replace immobilizer antenna: Replace the antenna around the ignition lock if it is defective
Update ECU software: Flash or reset the engine control unit with the latest firmware
Reprogram immobilizer: Reset the entire system and have all keys reprogrammed
Replace the engine control unit: In the event of irreparable ECU damage, replace and program the entire control unit
Check power supply: Test the battery and alternator and check all relevant fuses

FAQ - Frequently asked questions about DTC P1614

Can I continue driving with error code P1614?

No, code P1614 usually prevents the engine from starting completely. The vehicle is not ready to drive and must be repaired before it can be used again.

How much does it cost to repair error code P1614?

The repair costs vary between 150-800 euros, depending on the cause. A simple key programming costs around 150-250 euros, while an ECU replacement can cost 500-800 euros.

How long does it take to diagnose the P1614 trouble code?

A professional diagnosis usually takes 1-2 hours. The actual repair can take between 30 minutes and a whole working day, depending on the cause.

Can I repair the P1614 trouble code myself?

Basic checks such as cable checks are possible, but most repairs require special diagnostic equipment and programming software. A specialist workshop is usually necessary.

Does the P1614 code reappear after the repair?

If the repair has been carried out correctly, the code should not recur. If it does, there is usually an additional problem or the repair was incomplete.

Which diagnostic devices can read the P1614 EOBD code?

Professional OBD scanners and manufacturer-specific diagnostic devices can read this code. Simple code readers may not show all the details.

Vehicles in which the error code P1614 occurs most frequently

Error code P1614 is a manufacturer-specific DTC that indicates problems with the immobilizer and engine control unit and can occur in various vehicle brands, but is most common in the following vehicles:

Ford: Focus, Mondeo, Fiesta, Kuga, Galaxy (2005-2018)
Mazda: 3, 6, CX-5, CX-7, MX-5 (2008-2019)
Volvo: S60, V70, XC90, S80, V50 (2004-2016)
Nissan: Qashqai, X-Trail, Micra, Note, Juke (2007-2020)
Infiniti: Q50, QX70, G37, FX35, M35 (2008-2017)
Subaru: Impreza, Forester, Legacy, Outback, XV (2010-2021)

If code P1614 occurs in your vehicle, you should first test all available keys and check the battery voltage. As this is a safety-relevant error code that affects the immobilizer system, a professional diagnosis at a specialist workshop is usually unavoidable. The repair often requires special programming devices and manufacturer software, which is why self-repairs are only possible to a limited extent.

How to change front wheel bearing on MERCEDES-BENZ M W163 TUTORIAL | AUTODOC

151K views

Published on: 26/07/2018
How to change fuel filter BMW 3 (E90) [TUTORIAL AUTODOC]

241K views

Published on: 17/04/2019
How to change Front wheel bearing on VW GOLF 4 TUTORIAL | AUTODOC

177K views

Published on: 26/07/2018
How to change a rear brake pads FORD FOCUS 3 TUTORIAL | AUTODOC

169K views

Published on: 27/07/2018
How to change pollen filter / cabin filter on AUDI A6 (C6) [TUTORIAL AUTODOC]

150K views

Published on: 25/10/2019
How to change engine thermostat on PEUGEOT 207 [TUTORIAL AUTODOC]

147K views

Published on: 09/12/2020
How to change fuel filter NISSAN X-TRAIL T30 TUTORIAL | AUTODOC

139K views

Published on: 27/07/2018
How to change front wheel bearing TOYOTA YARIS XP10 TUTORIAL | AUTODOC

120K views

Published on: 26/07/2018

How to change serpentine belt on MERCEDES-BENZ A-Class (W169) – replacement guide

Free download PDF
1.38 MB
How to change engine oil and filter on BMW 1 Hatchback (F20) – replacement guide

Free download PDF
1.62 MB
How to change engine thermostat on VW Golf VI Hatchback (5K1) – replacement guide

Free download PDF
4.12 MB
How to change water pump & timing belt kit on Ford Fiesta JA8 – replacement guide

Free download PDF
7.83 MB
How to change front strut mount on AUDI A1 Hatchback (8X1, 8XK) – replacement guide

Free download PDF
3.8 MB
How to change water pump & timing belt kit on Peugeot 307 SW – replacement guide

Free download PDF
7.01 MB

Want to get more useful information?

Ask questions or share your repair experience on the car forum. Subscribe to updates so you don't miss out on new guides.

Ask on the forum

Why Checking Your Oil is Crucial for Engine Performance

6K views

Published on: 23/02/2023
Transform Your Car's Look: 6 Simple Accessories You Need to Try!

3K views

Published on: 18/11/2021
Engine Overheating? Replace Your Cooling Fan to Fix It

7K views

Published on: 15/11/2020
5 Essential Tips to Prepare Your Car for Winter | AUTODOC tips

6K views

Published on: 05/02/2024