ECU & Outputs Trouble Codes: List & Fixes
P06xx codes come from the engine or powertrain control module itself and from the output circuits it drives: internal memory or processor checks, sensor reference voltage and driver circuits for relays and actuators. Before condemning an expensive module, check battery condition, ground connections and fuses, and ask a dealer whether a software update exists. A replacement module often has to be programmed to the vehicle.
54Codes
2.9Average severity
15%High or critical
22%DIY-friendly
Severity distribution
Most viewed
P0562
Powertrain
The engine computer sees too little supply voltage – usually a charging, battery or ground…
Moderate
P0606
Powertrain
The engine computer failed its own internal self-test – check its power and grounds before…
Moderate
P1000
Ford · Powertrain
Ford's computer hasn't finished all its self-tests yet. It's a status message, not a fault.
Minor
P0217
Powertrain
The engine overheated. Stop driving: continuing can warp the head, blow the head gasket…
Critical
P0219
Powertrain
The engine was spun faster than its maximum allowed rpm, usually by a missed shift or wheelspin.
Moderate
P0480
Powertrain
Fault in the circuit that switches the main radiator fan – the engine can overheat in traffic.
Moderate
All codes (8)
P0217
Powertrain
The engine overheated. Stop driving: continuing can warp the head, blow the head gasket…
Critical
P0641
Powertrain
The PCM's shared 5-volt supply 'A' is missing or out of range – often one shorted sensor…
High
P0642
Powertrain
The PCM's 5-volt supply 'A' is being pulled below spec, usually by a short to ground in one…
High
P0685
Powertrain
The engine computer can't switch its own main power relay – open coil, blown fuse or broken…
High
P06DD
Powertrain
The ECM commanded an oil pressure change and the measured pressure didn't respond – check…
High
P1217
Nissan · Powertrain
Nissan's ECM saw engine coolant get hotter than it should, usually because the radiator fan…
Critical
P1682
Chevrolet · Powertrain
The engine computer's two ignition power feeds disagree, which can cause stalling or Reduced…
High
P2504
Powertrain
The charging system is overcharging – too much voltage can boil the battery and damage…
High