BMW i4 OBD-II Diagnostic Guide

20248★

0 complaints • 3 recalls

20237.5★

0 complaints • 7 recalls

20224.9★

9 complaints • 8 recalls

20219.5★

20209.5★

20199.5★

20189.5★

20179.5★

20169.5★

Est. DIY Parts: $250 - $900 (DIY: $50 - $200)

Model-Specific Telemetry

Top Check Engine Trouble Codes for BMW i4

U0100i4 Specific

U0100 on BMW i4: Diagnosis & Fix

Troubleshooting procedure for U0100: U0100: Lost Communication With Engine Control Module (ECM / PCM) specifically affecting BMW i4 (Single / Dual Motor EV (eDrive35, eDrive40, M50 536HP)).

Est. DIY Parts: $200 - $700 (DIY: $40 - $180)

U0121i4 Specific

U0121 on BMW i4: Diagnosis & Fix

Troubleshooting procedure for U0121: U0121: Lost Communication With Anti-Lock Brake System (ABS) Control Module specifically affecting BMW i4 (Single / Dual Motor EV (eDrive35, eDrive40, M50 536HP)).

Est. DIY Parts: $220 - $750 (DIY: $45 - $190)

U0140i4 Specific

U0140 on BMW i4: Diagnosis & Fix

Troubleshooting procedure for U0140: U0140: Lost Communication With Body Control Module (BCM) specifically affecting BMW i4 (Single / Dual Motor EV (eDrive35, eDrive40, M50 536HP)).

Est. DIY Parts: $180 - $600 (DIY: $40 - $150)

U0155i4 Specific

U0155 on BMW i4: Diagnosis & Fix

Troubleshooting procedure for U0155: U0155: Lost Communication With Instrument Panel Cluster (IPC) specifically affecting BMW i4 (Single / Dual Motor EV (eDrive35, eDrive40, M50 536HP)).

Est. DIY: $100 - $600 (DIY: $30 - $120)

Full Diagnostic Library

All OBD-II Codes for BMW i4

Showing 1–18 of 122 codes

Active:

1. Filter by Vehicle Manufacturer (25 Makes)

2. DTC System Category

3. Risk Severity Level

P0300Critical Severity

P0300: Random or Multiple Cylinder Misfire Detected

Flashing Check Engine Light (CEL) • Engine shaking, vibrating, or jerking at idle

Est. DIY: $400 - $1,800 (DIY: $150 - $400)

P0420Medium Severity

P0420: Catalyst System Efficiency Below Threshold (Bank 1)

Illuminated Check Engine Light (steady) • Rotten egg / sulfur odor from exhaust

Est. DIY: $80 - $350 (DIY: $15 - $70)

P0171Medium Severity

P0171: System Too Lean (Bank 1)

Check Engine Light on • Rough idling or engine hesitation on acceleration

Est. DIY: $120 - $300 (DIY: $25 - $60)

P0128Low Severity

P0128: Coolant Temperature Below Thermostat Regulating Temperature

Check Engine Light • Cabin heater takes too long to warm up

Est. DIY: $15 - $250 (DIY: $15 - $50)

P0455Low Severity

P0455: Evaporative Emission Control System Leak Detected (Gross Leak)

Check Engine Light on • Gas cap loose warning message on dashboard

Est. DIY: $45 - $220 (DIY Clean: $12)

P0101Medium Severity

Mass Air Flow (MAF) Sensor Circuit Range/Performance

Check Engine Light (CEL) illuminated • Rough or erratic engine idle

4 Step DIY GuideTroubleshoot

P0135Low to Medium Severity

Est. DIY: $80 - $240 (DIY Sensor: $45)

O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)

Check Engine Light on • Slightly increased fuel consumption on short trips

Est. DIY: $30 - $280 (DIY Clean: $15)

P0172Medium Severity

System Too Rich (Bank 1) - Symptoms, Causes & Step-by-Step Fix

Check Engine Light on • Strong unburnt fuel odor from exhaust

P0442Low Severity

Est. DIY: $25 - $200 (DIY: $15)

EVAP System Small Leak Detected - Diagnosis & Repair Guide

Check Engine Light on • Intermittent faint fuel odor near rear wheel well

Est. DIY: $40 - $250 (DIY Throttle Relearn: $0)

P0507Medium Severity

Idle Control System RPM Higher Than Expected - Diagnosis

Engine idles at 1,000+ RPM in park/neutral • RPM surges or hunts at red lights

Est. DIY: $120 - $350 (DIY: $40 - $80)

P0010Moderate Severity

P0010: Camshaft Position Actuator Circuit / Open (Bank 1)

System alert or indicator light illuminated (P0010) • Intermittent performance throttling or unexpected operation halts

Est. DIY: $150 - $450 (DIY: $50 - $120)

P0011High Severity

P0011: Camshaft Position - Timing Over-Advanced or System Performance (Bank 1)

System alert or indicator light illuminated (P0011) • Intermittent performance throttling or unexpected operation halts

Est. DIY: $150 - $450 (DIY: $50 - $120)

P0012High Severity

P0012: Camshaft Position - Timing Over-Retarded (Bank 1)

System alert or indicator light illuminated (P0012) • Intermittent performance throttling or unexpected operation halts

Est. DIY: $120 - $320 (DIY: $40 - $75)

P0013Moderate Severity

P0013: Exhaust Camshaft Position Actuator Circuit / Open (Bank 1)

System alert or indicator light illuminated (P0013) • Intermittent performance throttling or unexpected operation halts

Est. DIY: $150 - $420 (DIY: $45 - $90)

P0014High Severity

P0014: Exhaust Camshaft Position Timing Over-Advanced (Bank 1)

System alert or indicator light illuminated (P0014) • Intermittent performance throttling or unexpected operation halts

Est. DIY: $300 - $1,200 (DIY: $80 - $250)

P0016Critical Severity

P0016: Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A)

System alert or indicator light illuminated (P0016) • Intermittent performance throttling or unexpected operation halts

Est. DIY: $300 - $1,200 (DIY: $80 - $250)

P0017Critical Severity

P0017: Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor B)

System alert or indicator light illuminated (P0017) • Intermittent performance throttling or unexpected operation halts

Est. DIY: $100 - $300 (DIY: $15 - $80)

P0100Moderate Severity

P0100: Mass or Volume Air Flow Circuit Malfunction

System alert or indicator light illuminated (P0100) • Intermittent performance throttling or unexpected operation halts