P064EInternal Control Module O2 Sensor Processor Performance Bank 2
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- Wide-band oxygen sensors need a pump current control; inside the engine module a dedicated chip (ASIC, for example Bosch's CJ125 family) regulates it, measures lambda, diagnoses sensor wiring and heater, and talks to the main processor via SPI. P064E is the bank 2 counterpart of P064D and only occurs on V and boxer engines with two sensors before the catalysts. Ford sets it when the SPI communication with the bank 2 chip fails (10 s; an internal chip fault adds Ford's P1647); GM uses the same error counters as for bank 1 (128 of 160 samples, lamp after two trips). Fuel control on bank 2 then runs open loop, with higher consumption and emissions. Check the bank 2 sensor 1 wiring and sensor first; if they are fine, the engine module is the likely cause.
- What you may notice
- Check engine light
- Higher fuel consumption, rough running
- Failed emissions test
- Codes for the bank 2 sensor 1 wide-band sensor
- Likely causes
- LikelyEngine module (lambda chip bank 2) faulty
- PossibleWiring or connector fault of the bank 2 sensor 1
- PossibleBank 2 wide-band sensor faulty
- RareVoltage dips or software
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €150 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.