Fault codes P1400–P1499
P14xx codes mainly cover: egr valve, tank venting and fuel vapours. Our list has 15 codes in this range. With most of them you can drive gently, but get the car checked soon. Repairs cost roughly €10–700, depending on the fault. The most common are P1400, P1401, P1403. Based on AI combined with our hands-on workshop experience and knowledge.
Most common in this range
P1400EGR differential pressure sensor (DPFE): signal too lowP1401EGR valve circuit shorted to groundP1403EGR system flow deviationP1405DPFE sensor upstream hose off or blockedP1406DPFE sensor downstream hose off or blockedP1411Secondary air flow too low (bank 2)P1416Secondary air valve fault (bank 2)P1421Secondary air valve circuit shorted to ground
All codes in this range
P1400EGR differential pressure sensor (DPFE): signal too lowP1401EGR valve circuit shorted to groundP1403EGR system flow deviationP1405DPFE sensor upstream hose off or blockedP1406DPFE sensor downstream hose off or blockedP1411Secondary air flow too low (bank 2)P1416Secondary air valve fault (bank 2)P1421Secondary air valve circuit shorted to groundP1425Purge valve circuit shorted to groundP1434Fuel vapour leak check pump (DMTL)P1450Unable to pull vacuum in the fuel tankP1453Secondary air pump relay circuit faultP1456Fuel vapour leak on the tank sideP1457Fuel vapour leak on the canister sideP1491EGR valve lift insufficient
Want a definite answer?
Bring the car to our workshop in Estonia for diagnostics. We read the fault codes, test the sensors and tell you what is wrong. Repair price depends on the work involved, generally €45 per hour.