Chrysler 52 Fuel System Rich
How to read it
Code 52 reads as 5 flashes, pause, 2 flashes on the check-engine light. Cycle the ignition key on, off, on, off, then leave it on with the engine off, and count the flashes on the power loss or check-engine light.
New to flash codes? The How to Read Chrysler OBD-I Codes with the Key Cycle walks through the test and what the numbers mean. The general OBD-I guide covers the rest.
What does Chrysler code 52 mean?
Fuel System Rich
Common causes of 52
- Leaking fuel injector or high fuel pressure
- Saturated charcoal canister purging excess vapor
- Restricted air filter or intake
- Failed oxygen sensor stuck rich
- On some models an ignition coil or power transistor fault sets this same code
How to fix 52
- Check fuel pressure and leak down against specification
- Inspect the air filter and intake duct for restriction
- Watch oxygen sensor cross counts on a scan tool
- Check the canister and purge system for saturation
- Test the ignition coil or power transistor on models that share this code
- Clear the code and road test
Source
Qualified source review
Sources and review
Review: qualified. Read the source limits below.
- Chrysler OBD-I trouble codes, model and year page
live reference page (troublecodes.net)
Supports: code identity and Chrysler meaning
Fetched directly from the linked model page. Single publisher, so the record is qualified, not verified. Causes and check order are curator-written from the circuit the code names.
https://www.troublecodes.net/chrysler/84-95tbi/
- Chrysler OBD-I trouble codes, model and year page
live reference page (troublecodes.net)
Supports: code identity and Chrysler meaning
Fetched directly from the linked model page. Single publisher, so the record is qualified, not verified. Causes and check order are curator-written from the circuit the code names.
https://www.troublecodes.net/chrysler/85-95_22-25/
Last updated 2026-10-10.
Report a correction for 52. Include your vehicle, the issue and a source if you have one.