Is It Safe to Drive With a P2229 Code?
Common Symptoms of a P2229 Fault
P2229 Symptoms at a Glance
EML on
Reduced fuel economy
Rougher idle when stationary
Occasional misfires
Possible Causes of P2229
A P2229 code can be triggered by faults across several systems. Identifying the exact root cause requires proper diagnostic equipment and live data — not just reading the code.
Common Causes of P2229
Faulty BARO Sensor
Internal short or degradation in the sensor.
Short to Power / Broken Ground
A short to +12V or a broken ground in the wiring harness.
Connector Corrosion
Damaged pins or water ingress at the connector.
ECM Fault
Rare, but the ECM's input circuit itself can fail.
Why we don't list the exact part: A P2229 code tells you what's happening but not why. Replacing parts without diagnosis is the most common way drivers waste money. A proper diagnosis identifies the specific cause first.
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P2229 and Your MOT
A stored P2229 fault code will cause your car to fail its MOT due to the illuminated engine management light. Get the fault diagnosed and repaired, then have the code cleared before booking your test.