OBD-II Code

P0805

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)

$20–$280

From this code's diagnostic notes. Varies by vehicle, diagnosis, parts, and local labor. This is not a repair quote.

P0805 sets when the PCM detects an out-of-range or implausible signal from the clutch position sensor on a manual transmission, which the engine computer uses for cruise control disable, starter inhibit, and rev-hang management on drive-by-wire engines.

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 procedureP0805 sets when the PCM detects an out-of-range or implausible signal from the clutch position sensor on a manual transmission, which the engine comp…+

Cheapest first

confirm this is a manual-transmission vehicle and scan-tool watch the Clutch Position PID while operating the pedal through full travel; the signal should sweep smoothly from one end of its range to the other (typically 0.5V at rest to 4.5V fully pressed).
A flatlined or jumpy signal points to the sensor itself; a signal that reads correctly at one end of pedal travel but goes dead at the other often points to a broken plunger or a pedal-position switch that has fallen out of its bracket.
Caveat: replacing the clutch master or slave cylinder, or the entire clutch assembly, on a P0805 is a massive misdiagnosis since this code is almost always a $40 sensor or a $5 retainer clip.

Vehicle-specific patterns2006 to 2014 VW Golf, Jetta, GTI, and Audi A3 with manual transmission have a documented clutch master cylinder pin and clip failure where the small…+

2006to 2014 VW Golf, Jetta, GTI, and Audi A3 with manual transmission have a documented clutch master cylinder pin and clip failure where the small retaining clip at the pedal-to-master-cylinder pivot pops off, the master cylinder pin walks out, and the clutch position sensor reads a permanent half-pressed value setting P0805; the fix is the updated clip kit and is sub-$20 in parts.
2008to 2013 BMW E90/E92 335i and 1M with the 6-speed manual fail the clutch position sensor on the master cylinder, often after a clutch hydraulic bleed where fluid contaminates the sensor.
2010to 2015 Hyundai Genesis Coupe and 2013 to 2016 Veloster Turbo with manual trans trip P0805 from a failed clutch switch on the pedal bracket.
2005to 2010 Ford Mustang GT with the TR-3650 has clutch position switch failures from the rubber boot tearing.

Estimated repair$20 to $280.

Look up another code

← All OBD-II codes

More free tools

See all 9 tools