Subaru OBD Codes: Meaning & Fixes
Subaru: 27 error codes with meaning, severity, likely causes and repair cost estimates.
16Codes
2.4Average severity
0%High or critical
25%DIY-friendly
Severity distribution
Generic codes with Subaru data
Field data · Subaru
Source: NHTSA Complaints API (US government open data), analyzed by DTC mention.
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P0420
Powertrain
The bank 1 catalytic converter no longer stores enough oxygen to clean the exhaust properly.
Low
P0171
Powertrain
The engine computer is adding the maximum extra fuel it's allowed on bank 1 and still sees…
Moderate
P0700
Powertrain
The transmission computer found a fault and asked for the check engine light – read the TCM…
Moderate
P2138
Powertrain
The two sensors in the gas pedal report different pedal positions, so the PCM limits throttle…
Moderate
P0011
Powertrain
The bank 1 intake cam sits further advanced than the PCM asked for, usually an oil or control…
Moderate
P0021
Powertrain
The bank 2 intake cam is more advanced than commanded or slow to respond; compare it with bank…
Moderate
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