P2591 code meaning
Cruise Control Front Distance Range Sensor Left
What P2591 means
P2591 is reserved for the left front distance sensor in cruise systems that combine several radars across the front; a single or centre unit uses P2583 and the right one P2592. No manufacturer documents P2591 publicly. Honda's bulletins on P2583 show what such a sensor typically reports: a view blocked by ice or dirt, or a misalignment the unit detects itself. A left corner sensor sits behind the bumper cover, so parking knocks, a repainted or replaced bumper, thick paint over the sensor area and bent brackets are prime suspects, before wiring or the sensor itself. CARB cites a cruise control that turns itself off on a detected fault as a diagnostic without emission impact, so a check engine lamp is not to be expected. Adaptive cruise and related assistance remain unavailable.
P2591 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyHard
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2591
- Adaptive cruise control not available
- Driver assistance warning message
Common causes of P2591
- Most likelyBumper cover damaged, replaced or repainted over the left sensor
- PossibleLeft sensor bracket bent, sensor aimed wrongly
- PossibleIce, mud or stickers covering the sensor area
- Less likelySensor or wiring to the left corner faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Acc radar sensor left
What each part of P2591 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 5 | Area: vehicle speed, idle control and auxiliary inputs. |
| 91 | The exact fault in that area. |
What to do next
- Note P2591 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2591
What does P2591 mean?
P2591 means "Cruise Control Front Distance Range Sensor Left". P2591 is reserved for the left front distance sensor in cruise systems that combine several radars across the front; a single or centre unit uses P2583 and the right one P2592. It is a generic code, so it means the same on every make.
Is it safe to drive with P2591?
P2591 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will P2591 fail an emissions test?
P2591 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is P2591 to fix?
Difficulty: hard. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P2591 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.