OBD-II Code
P0348
Severity
Not yet reviewed
Nobody on our side has assessed this code yet, so we are not going to guess at how serious it is.
Can you drive it
We cannot say
Treat it as unknown until a shop reads it with live data. If the check-engine light is FLASHING, stop driving as soon as it is safe to — that means an active misfire, whatever the code.
Indicative cost (USD)
$60–$340
From this code's diagnostic notes. Varies by vehicle, diagnosis, parts, and local labor. This is not a repair quote.
P0348 is the opposite of P0347 - the Bank 2 CMP A signal is pinned high (typically above 4.9V on a 5V Hall-effect circuit), which the PCM interprets as an open signal circuit, an open ground, or a sensor that has gone fully open internally.
How a shop works this
Work from evidence to part, not the other way round. A code names a circuit or a symptom; it does not name the part that failed.
Note every code that is set, not just this one.
Codes that appear together usually narrow the cause faster than any one of them read alone.
Read the freeze frame — the conditions the fault was recorded under.
Cold or warm, idle or load, road speed and engine speed. A fault that only appears cold is a different fault from one that only appears under load, even with the same code on the scanner.
Confirm the fault is current rather than history.
Clear the code and see whether it returns under those same conditions. A code that does not come back may have been logged during a repair, a flat battery, or a bad connection that has since been disturbed.
Then follow the diagnostic notes further down this page, in the order they are written.
They are written in the order a shop works this code, cheapest checks first. Where they name a component, inspect its wiring and connector before replacing it.
If the code comes back after a repair, the underlying fault is still there. That is the point to bring in a scanner with live data and freeze-frame, or a shop that has one.
Common symptoms
- Check engine light
Read the full diagnostic procedureP0348 is the opposite of P0347 - the Bank 2 CMP A signal is pinned high (typically above 4.9V on a 5V Hall-effect circuit), which the PCM interprets…
P0348 is the opposite of P0347 - the Bank 2 CMP A signal is pinned high (typically above 4.9V on a 5V Hall-effect circuit), which the PCM interprets as an open signal circuit, an open ground, or a sensor that has gone fully open internally.
Cheapest-first ladder
- jump the signal pin to the sensor ground pin at the Bank 2 CMP harness connector with key-on - if the PCM now reports a valid (typically pinned-low) cam signal, the sensor is open internally and replacement clears it.
- If jumping the pins produces no PCM response, the open is in the signal wire, the sensor ground, or the PCM input itself - verify ground continuity (under 0.1 ohm to PCM ground), then resistance-check the signal wire end-to-end.
- Confirm the 5V reference at the connector is 4.9 to 5.1V key-on.
- On Hall-effect CMPs the live signal should toggle 0 to 5V square wave; on VR sensors the live signal swings 0.5 to 8V AC depending on RPM. Verify the sensor air gap to the reluctor wheel is within spec (typically 0.020 to 0.050 inch) - a sensor that has walked in its bore reads pinned-high exactly like an open circuit.
- The expensive misdiagnosis is replacing the PCM for an open coil-driver when the actual fault is a corroded ground splice or a broken signal wire under harness loom - always verify ground path and wire continuity before condemning the PCM.
Vehicle-specific patterns2007-2014 Ford 3.5L/3.7L Cyclone V6 Bank 2 CMP harness chafes against the rear cylinder head exhaust manifold heat shield, opening the signal wire af…
- 2007-2014Ford 3.5L/3.7L Cyclone V6 Bank 2 CMP harness chafes against the rear cylinder head exhaust manifold heat shield, opening the signal wire after long highway miles.
- 2011-2018Chrysler 3.6L Pentastar Bank 2 CMP connector backs out of the sensor at the rear of the cylinder head from vibration - reseat the connector with a fresh CPA lock before replacing parts.
- 2010-2016Hyundai/Kia 3.3/3.8 Lambda V6 Bank 2 CMP loses ground continuity at the underhood ground stud near the rear cylinder head - clean and retorque the ground before swapping the sensor.
- 2007-2013Toyota 2GR-FE V6 (Camry, RAV4, Highlander, Sienna) Bank 2 CMP can develop an internal open after 150k miles and reads pinned-high cold but recovers warm; verify with key-on cold backprobe before condemning.
- 2008-2014Nissan VQ35DE/VQ40DE Bank 2 CMP can lose its sensor ground when the underhood harness is disturbed during a valve cover gasket job - a common return-visit complaint.
Estimated repair$60 to $340.
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