P0302 indicates your engine's computer has detected consistent misfires specifically in cylinder 2. This single-cylinder code narrows the problem to that cylinder's ignition coil, spark plug, fuel injector, or internal compression, making targeted diagnosis significantly easier compared to a random misfire code like P0300.
DTC/P0302·Peugeot
P0302 on Peugeot: Causes, Symptoms and Fix Cost
Quick Answer
High SeverityNot safe to drivePeugeot
P0302 on a Peugeot indicates your engine's computer has detected consistent misfires specifically in cylinder 2. This single-cylinder code narrows the problem to that cylinder's ignition coil, spark plug, fuel injector, or internal compression, making targeted diagnosis significantly easier compared to a random misfire code like P0300.
Repair cost on Peugeot€37 - €1890
What does P0302 mean on a Peugeot?
Peugeot 308
2007-2024The 1.2 PureTech 3-cylinder engine (EB2) in 2014+ models has a known issue with carbon buildup and timing chain stretch causing misfires. Since it is a 3-cylinder, cylinder 2 is the middle cylinder and can be more difficult to access. The 1.6 THP (EP6) also suffers coil and plug failures.
What causes P0302 on a Peugeot?
Beyond the generic causes listed on the main P0302 page, these are the Peugeot-specific patterns we see most often:
Peugeot 308Timing chain stretch on 1.2 PureTech (EB2)
Peugeot 308Ignition coil failure on 1.6 THP (EP6)
How to diagnose P0302 on a Peugeot with OBD2
Follow these steps to pinpoint the root cause of P0302:
- Read freeze-frame data and note engine RPM, load, and temperature when the misfire occurred
- Swap the ignition coil from cylinder 2 to a different cylinder. Clear codes and drive. If the misfire code moves to the new cylinder, the coil is faulty
- Inspect the spark plug on cylinder 2 for wear, oil fouling, or abnormal electrode erosion. Replace if needed
- Test the fuel injector on cylinder 2 using a noid light or by listening for the click pattern with a mechanic's stethoscope
- If spark and fuel are confirmed good, perform a compression test on cylinder 2. Compare results against the manufacturer's specification and other cylinders
How much does P0302 cost to fix on a Peugeot? (EUR)
Estimated repair costs on a Peugeot (Peugeot parts and labour typically run 5% above the average for this code).
Prices estimated as of May 2026. Costs vary by region, vehicle, and shop.
Related codes that often appear with P0302 on Peugeot
These codes commonly cluster with P0302 on Peugeot vehicles:
FAQ: P0302 on Peugeot
What does P0302 mean?
P0302 means your engine's control module has identified that cylinder 2 is misfiring. The ECU monitors crankshaft acceleration after each firing event and flags the code when cylinder 2 consistently fails to produce the expected power.
How do I fix P0302?
Start with the cheapest and most common fix: replace the spark plug on cylinder 2. If that does not help, swap the ignition coil with another cylinder to test it. Beyond that, check the fuel injector and then compression.
Can P0302 cause catalytic converter damage?
Yes. Unburned fuel from the misfiring cylinder enters the catalytic converter and ignites there, raising temperatures far above normal. Prolonged driving with a misfire can destroy the converter, adding hundreds of euros to the repair bill.
Why does my car shake with P0302?
When cylinder 2 misfires, it produces no power during its combustion stroke. This creates an imbalance in the engine's rotational forces, which you feel as vibration through the chassis, especially at idle when the engine speed is low.
Is P0302 an expensive repair?
Usually not. The most common causes are a spark plug or ignition coil, which cost between 30 and 150 EUR including labour. It only becomes expensive if the root cause is low compression from a burnt valve or head gasket failure.
Looking for the full P0302 reference (all makes, full diagnosis flow, complete repair cost matrix)?
See the main P0302 guideSkanyx · Peugeot
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