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Land Rover Disco I Misfire Codes P1313 and P1314: Causes, Symptoms, and Fixes

Model: Land Rover Fault Code: P1313 Posted: 2007-02-16 12:56

I recently performed an engine swap on my Land Rover Disco I. Since then, I've been consistently seeing Diagnostic Trouble Codes P1313 (Bank 1) and P1314 (Bank 2), both related to misfire rates. The vehicle runs smoothly under normal conditions, but these codes appear specifically when the engine is cold. After clearing the codes, the truck operates normally for several hours. However, as it cools down, the codes return upon restart. Clearing them again temporarily resolves the issue until the next cold start. I'm looking for reliable explanations and troubleshooting steps to identify the root cause of this recurring problem.

Related fault codes
P1313P1314
Comments (6)
Anonymous 2007-02-16 15:04

Could this be an ignition system issue? What components should I inspect first?

Anonymous 2007-02-16 18:14

I've already replaced the spark plugs and ignition wires. I’ve ordered four oxygen sensors, but at a cost of over $100 each, I’m holding off on that as a last resort. If it's an ignition issue, what could be failing? Are injector problems likely? What symptoms should I look for? The truck runs strong and smooth—would faulty injectors show up consistently or only intermittently? Any insights would be appreciated!

Anonymous 2007-10-24 11:38

Have you found a solution to this issue? My Jaguar X-Type is exhibiting the same P1313 and P1314 codes under identical conditions.

Anonymous 2008-05-12 21:47

Did you ever resolve this problem? What steps did you take? I'm experiencing exactly the same symptoms.

Anonymous 2008-05-17 17:38

As Jeff mentioned, start with checking the ignition system—replace spark plugs and cables, and verify spark quality. After that, inspect fuel pressure to ensure it's within specifications.

Anonymous 2008-05-24 09:47

Hey guys—I've worked on Land Rovers for over 20 years. The issue you're experiencing might be a vacuum leak at the intake manifold or in one of the hoses. Visit your local parts store and get a few bottles of brake cleaner. Spray it around the engine's intake system and hoses—any noticeable change in RPM indicates a leak. Also remember that Land Rover’s V8 engines are made from aluminum, which expands and contracts with temperature changes. The intake manifold is often the culprit. Check all vacuum hoses, especially the one connected to the cruise control servo—it frequently breaks and can cause both misfire codes and loss of cruise control functionality.