Jeep OBD Codes: Meaning & Fixes
Jeep: 74 error codes with meaning, severity, likely causes and repair cost estimates.
36Codes
2.7Average severity
19%High or critical
11%DIY-friendly
Severity distribution
Generic codes with Jeep data
Field data · Jeep
Source: NHTSA Complaints API (US government open data), analyzed by DTC mention.
Most viewed
P0302
Powertrain
Cylinder 2 keeps misfiring. On inline engines it's a middle cylinder, so rule out coolant…
Moderate
P0304
Powertrain
Cylinder 4 is misfiring. Its end or rear position makes water, oil and intake leaks common…
Moderate
P0300
Powertrain
The engine computer sees misfires that jump between cylinders or hit several cylinders at once.
High
P0105
Powertrain
The PCM lost a usable signal from the manifold pressure sensor: dropouts, noise or values it…
Moderate
P2101
Powertrain
The throttle plate isn't reaching the position the computer asks for, fast enough or accurately…
Moderate
P0420
Powertrain
The bank 1 catalytic converter no longer stores enough oxygen to clean the exhaust properly.
Low
All codes (36)
P2404
Powertrain
The switch that reports the leak pump's position isn't changing state the way it should during…
Low
P2503
Powertrain
The alternator can't reach the voltage the ECM asks for – usually a worn alternator or slipping…
Moderate
P2504
Powertrain
The charging system is overcharging – too much voltage can boil the battery and damage…
High
U0141
Network
A body module labeled "A" went silent; on many trucks and SUVs it is the smart fuse box under…
Moderate
U0402
Network
The transmission module is online, but the gear, range or torque data it sends doesn't add up.
Moderate
U0404
Network
The electronic shifter reports a lever position the transmission can't trust, so Park may not…
High