P2D99

Starter/Generator Phase Y Current Circuit Intermittent/Erratic

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–222 (est.)

Symptoms

Unstable engine operation
Problems starting the engine
Battery charge indicator flashing
Generator power reduction
Errors in other electrical systems

Causes

Damage to phase Y wiring harness
Oxidation or poor contact in connectors
Starter-generator malfunction
Problems with the control module
Short circuit in the circuit

How to Fix

Check the integrity of the phase Y wiring harness
Clean and check connector contacts
Test the starter-generator
Check control module
Measure the resistance and voltage in the circuit

Related codes

P2D98 P2D9A P2D9B