OBD-II Code · Network

U0155

Lost Communication with Instrument Panel Cluster

Severity

high

Left alone, this one tends to take other parts with it.

Can you drive it

Only if running normally

A short trip to a shop may be reasonable if the light is steady and the car runs normally. Stop safely for a flashing light, severe shaking, overheating, loss of power, or another urgent warning. The code alone cannot confirm safety.

Indicative cost (USD)

$300–$1,500

Varies by vehicle, diagnosis, parts, and local labor. This is not a repair quote.

IPC communication lost.

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 work the likely-causes list in the order shown.
That order is what a shop checks first for this code — wiring and connections before the component they run to, because a connector costs nothing to inspect and is a common answer.

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

Dead gauges
No warning lights

Likely causes

Failed clusterMost common
Wiring
Power

Read the full diagnostic procedureU0155 means the Instrument Panel Cluster (IPC) has stopped communicating, which is significant because on many vehicles the IPC contains one of the t…+

U0155 means the Instrument Panel Cluster (IPC) has stopped communicating, which is significant because on many vehicles the IPC contains one of the two 120-ohm CAN bus terminators. If the cluster goes dark and you lose communication with multiple downstream modules, you may have a terminator problem masquerading as a cluster problem.

Cheapest-first

check cluster fuses (usually two: ignition and constant battery for trip memory), then verify ground at the cluster connector.
A common shortcut is a key-off 60-ohm reading across DLC pins 6 and 14; if you read 120 ohms instead, the cluster terminator is open (or the cluster is disconnected) and that alone will cause U0155 plus a cascade of comm faults.
With the cluster still installed, scope CAN-H/CAN-L at the cluster connector to confirm 2.5V each at idle.
Be aware that 2007+ clusters are odometer-coded and VIN-locked, so a used cluster requires either dealer programming or specialized re-flash (Mileage Plus, XTOOL X100 Pad3, Autel IM608).
Buying a $600 used cluster off eBay without confirming the bus has both terminators and the cluster has VIN-match capability is the classic U0155 rabbit hole.

Vehicle-specific patterns2003-2006 GM trucks (Silverado, Tahoe, Suburban) suffer the famous stepper-motor and backlight failure on the cluster, often accompanied by intermitt…+

2003-2006GM trucks (Silverado, Tahoe, Suburban) suffer the famous stepper-motor and backlight failure on the cluster, often accompanied by intermittent U0155 from cold-solder joints on the cluster PCB; rebuild services restore the original cluster keeping the VIN/odometer intact.
2007-2014Chrysler/Dodge with TIPM sees U0155 with no-crank and dead cluster as the TIPM ignition relay fails.
2004-2008Ford F-150 has known cluster fade and U0155 from cold solder; Ford issued service actions on early trucks.
2006-2011BMW E90 sees U0155 from the cluster's K-CAN line corroded at the X14 connector behind the glove box.

Estimated repair$90 to $1100.

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U0155 — frequently asked

What does a U0155 code mean?

IPC communication lost.

What causes a U0155 code?

Common causes: Failed cluster; Wiring; Power.

What are the symptoms of a U0155 code?

Typical symptoms: Dead gauges; No warning lights.

Is it safe to drive with a U0155 code?

Only if running normally. A short trip to a shop may be reasonable if the light is steady and the car runs normally. Stop safely for a flashing light, severe shaking, overheating, loss of power, or another urgent warning. The code alone cannot confirm safety. Estimated repair: $300-$1,500.

How do I diagnose a U0155 code?

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. 1. Note every code that is set, not just this one. 2. Read the freeze frame — the conditions the fault was recorded under. 3. Confirm the fault is current rather than history. 4. Then work the likely-causes list in the order shown.

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