OBD-II Code
P0655
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)
$75–$700
From this code's diagnostic notes. Varies by vehicle, diagnosis, parts, and local labor. This is not a repair quote.
$75 (cluster rebuild) to $700 (cluster replacement + programming).
P0655 means the PCM detected a fault on the Engine Hot Lamp (or coolant overtemp warning lamp) output control circuit — the dedicated low-side driver that grounds the dash overtemp indicator when ECT exceeds the manufacturer's hot threshold (typically 235-250F).
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 procedureP0655 means the PCM detected a fault on the Engine Hot Lamp (or coolant overtemp warning lamp) output control circuit — the dedicated low-side driver…
P0655 means the PCM detected a fault on the Engine Hot Lamp (or coolant overtemp warning lamp) output control circuit — the dedicated low-side driver that grounds the dash overtemp indicator when ECT exceeds the manufacturer's hot threshold (typically 235-250F).
Same control logic as P0650 for the MIL
the PCM grounds the wire to illuminate the lamp, releases it to extinguish, and monitors feedback continuity. P0655 sets on open circuit, short to ground (lamp stuck on), short to power, or cluster failure to acknowledge the CAN engine-hot request. Shop-floor ladder, cheapest first: cycle the key to ON and observe the cluster bulb check — most platforms light the engine-hot indicator briefly at KOEO. If the lamp never illuminates during the bulb check, you've got either a blown bulb, a broken cluster trace, or an open control wire. On CAN-driven clusters, scan the network and verify the cluster sees the lamp-on request from the PCM; if the message arrives but the lamp stays dark, the cluster driver or LED is the problem. Backprobe the discrete lamp wire (where applicable) at the PCM output pin — should read battery voltage with lamp off, 0V with lamp commanded on. Drive the vehicle until ECT crosses 230F and watch the PID; if the PCM commands the lamp on but the cluster never lights, the fault is downstream of the PCM. Expensive-misdiagnosis caveat: P0655 on a GM cluster with multiple lamp faults usually means a cluster solder issue, not a PCM driver issue — same rebuilder fix as P0650 for $75-150 versus a $600 cluster replacement.
Vehicle-specific patterns2007-2014 GM full-size trucks and SUVs (Silverado, Sierra, Tahoe, Yukon, Suburban) commonly throw P0655 alongside P0650 from the same cluster solder-…
- 2007-2014GM full-size trucks and SUVs (Silverado, Sierra, Tahoe, Yukon, Suburban) commonly throw P0655 alongside P0650 from the same cluster solder-joint failure pattern — when the cluster's lamp driver bank cracks, multiple lamp-control codes set together.
- 2004-2010Ford F-150 / Expedition with the gauge cluster throws P0655 from cluster IC failure or from a broken engine-hot bulb socket.
- 2003-2009Dodge Ram throws P0655 from gauge-cluster solder failures at the hot-lamp driver IC. Any vehicle with a missing bulb-check on the temperature warning indicator at KOEO is a primary P0655 candidate.
Estimated repair$75 (cluster rebuild) to $700 (cluster replacement + programming).
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