C1182
Park Lamp Flash Relay Circuit Failure
Chassis Chassis/Safety Lighting Control 🔴 Serious — Stop or limit driving
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What This Actually Means
In plain language — no jargon

The park lamp flash relay isn't working properly, so your lights can't flash as intended. Think of it like a light switch that's stuck and won't toggle on and off smoothly.

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Symptoms You May Notice
3 known symptoms for this code
Park lamps fail to flash or flash intermittently
Park lamps stay on or off continuously
Dashboard warning light illuminated
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Embedded Systems Insight
What the ECU/ECM is actually computing

The ECU monitors the park lamp flash relay circuit for proper voltage and current delivery during flash sequences. It detects open or short circuits by measuring relay coil voltage and output circuit resistance. A fault occurs when voltage levels fall outside expected parameters or the relay fails to respond to control signals.

Voltage & Parameter Thresholds

Parameter Normal Range Fault Condition
Relay Coil Voltage 12-14V when commanded Below 10V or above 16V
Output Circuit Resistance Less than 2 ohms Greater than 5 ohms or open circuit
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Diagnostic & DIY Fix Guide
Check these in order — from cheapest to most complex
1
Park lamp relay
Locate the relay in the fuse/relay box and swap it with an identical relay to test; replace if faulty.
2
Wiring harness and connectors
Inspect relay socket pins and wiring for corrosion, loose connections, or damage; clean or reseat as needed.
3
Park lamp bulbs and sockets
Test bulbs for continuity and inspect sockets for corrosion or poor contacts; replace defective bulbs or clean sockets.